• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An arrangement for geothermal heating, the arrangement comprising: a geothermal well (4) extending into the soil (1), the geothermal well (4) being provided with a liquid heat transfer medium (17), the geothermal well (4) having a first depth (A) of the geothermal between the upper end (5) of the well (4) and the lower end (6) of the geothermal well (4), characterized in that the first depth (A) is at least 300 m, and the arrangement further comprises: a heat collector loop (20) for circulating the primary working medium in the geothermal well (4); ), which heat collector loop (20) is arranged in the geothermal well (4) and arranged to extend to a second depth (B) in the geothermal well, which second depth is equal to or less than 75% of the first depth; a flow channel (10) arranged in the geothermal well (4), the flow channel (10) comprising an upper flow opening (11) and a lower flow opening (13), the flow channel extending in the geothermal well (4) from the top of the geothermal well (4) and the geothermal well (4) between the lower part so that the lower flow opening (13) is provided for a third depth (E) in the geothermal well (4), which third depth (E) is greater than the second depth (B); and a propulsion arrangement (12, 90) arranged in connection with the flow channel (10), the propulsion arrangement (12, 90) being arranged to transfer the liquid heat transfer medium (17) along the flow channel (10) between the upper flow opening (11) and the lower flow opening (13). for circulating the heat transfer medium (17) in the geothermal well (4) between the upper part of the geothermal well (4) and the lower part of the geothermal well (4). In addition, protection requirements 2-5.
    公开号:FI12723Y1
    申请号:FIU20204058U
    申请日:2020-04-01
    公开日:2020-08-14
    发明作者:Rami Niemi
    申请人:Quantitative Heat Oy；
    IPC主号:
    专利说明:

    ARRANGEMENT FOR GEOTHERMAL HEATING
    FIELD OF THE INVENTION The invention relates to an arrangement for geothermal heating according to claim 1. - BACKGROUND OF THE INVENTION Geothermal heating - based on the extraction of thermal energy from the soil. The soil temperature gradually rises as a function of depth from the ground = downwards. The rising temperature of the soil is traditionally utilized to generate thermal energy with collectors installed - in the soil or in a hole provided in the soil, and by circulating a working medium such as ethanol in the collector. The working medium takes heat energy from the soil and the taken thermal energy is released from the working medium for use in a heat pump or heat exchanger. Higher soil temperatures are more advantageous because more thermal energy can be produced by utilizing higher temperatures.
    Thus, it is more advantageous to install the collector to extend deeper into the soil where higher temperatures are available.
    Installing the collector deeper also becomes more difficult as a function of depth. In addition, moving the fluid deep from a high temperature is difficult because the fluid tends to release thermal energy as it flows - upward as the ambient temperature drops upwards.
    BRIEF DESCRIPTION OF THE INVENTION The object of the invention is to provide an arrangement for geothermal heating in such a way that the disadvantages of the prior art are solved or at least alleviated.
    The objects of the invention are achieved by an arrangement for geothermal heating according to independent protection claim 1 N.
    Preferred embodiments of the invention are set out in the dependent claims.
    a The invention is based on the provision of an arrangement for geothermal O 30 heating, which arrangement comprises a geothermal well extending 3 into the soil and having an upper end and a lower end. The geothermal well is also equipped with S liquid heat transfer medium. Thus, the geothermal well is filled or is> substantially filled with a liquid heat transfer medium. The arrangement further comprises a heat collector loop for circulating the primary working medium in the geothermal well.
    The heat collector loop is arranged in a geothermal well.
    Thus, the heat collector loop is arranged in a liquid heat transfer medium in a geothermal well.
    The arrangement further comprises a flow channel provided - to the geothermal well.
    The flow channel comprises an upper flow opening and a lower flow opening and extends in the geothermal well between the upper part of the geothermal well and the lower part of the geothermal well.
    Thus, the flow channel is arranged in a liquid heat transfer medium in a geothermal well and extends between the upper part of the geothermal well and the lower part of the geothermal well.
    Thus, the flow channel comprises an upper flow opening at the top of the geothermal well and a lower flow opening at the bottom of the geothermal well.
    The arrangement also comprises a propulsion arrangement arranged in connection with the flow channel =.
    The propulsion arrangement is arranged to transfer - a liquid heat transfer medium along a flow channel between the upper flow opening and the lower flow opening to circulate the liquid heat transfer medium in the geothermal well between the upper part of the geothermal well and the lower part of the geothermal well.
    Thus, the propulsion arrangement transfers the liquid heat transfer medium - in the flow channel from the upper flow opening to the lower flow opening, or from the lower flow opening to the upper flow opening, recirculating the liquid heat transfer medium in the geothermal well and between the top and bottom of the geothermal well.
    In one embodiment, the geothermal well has a first - depth between the upper end of the geothermal well and the lower end of the geothermal well, and the heat collector loop is arranged to extend to a second depth S from the upper end of the geothermal well.
    The second depth is equal to or less than 75% of the first depth, or the second depth is between 5 and 75% of the first depth G, or preferably between 5 and 60% of the first depth.
    A 30 Thus, the heat collector loop is arranged only for a part of the first depth of the geothermal E well.
    The heat collector loop extends from the upper end of the geothermal well © along at least a portion of the first depth of the geothermal well.
    S The flow passage and propulsion arrangement are thus arranged to transfer thermal energy to the heat collector loop at the bottom of the N geothermal well by circulating the liquid S 35 heat transfer medium in the geothermal well.
    In one embodiment of the present invention, the lower flow opening of the flow channel is arranged in the geothermal well to a third depth from the upper end of the geothermal well. The third depth is equal to or greater than the second depth. Alternatively, the third depth is at least 75% of the first depth or preferably at least 80% of the first depth or between 75% -100% of the first depth or preferably between 90% and 100% of the first depth.
    Thus, in the present invention, the flow channel and the propulsion arrangement are arranged to take the liquid heat transfer medium from the third depth of the geothermal well through the lower flow opening and transfer it - in the flow channel to the upper flow opening. Alternatively, in the present invention, the flow channel and the propulsion arrangement are arranged to take the liquid heat transfer medium through the upper flow opening and transfer it in the flow channel to the lower flow opening at the third depth. In addition, alternatively, the flow channel and propulsion arrangement are arranged to supply new liquid heat transfer medium from outside the geothermal well to the flow channel and transfer new liquid heat transfer medium in the flow channel to a lower flow opening at a third depth.
    In one embodiment, the upper flow opening of the flow channel is provided in the geothermal well to a fourth depth from the upper end of the geothermal well. The fourth depth is smaller than the second depth. Alternatively, the fourth depth is less than 50% of the first depth or preferably less than 25% of the first depth, or between 0% and 30% of the first depth, or preferably between 0% and 20% of the first depth.
    Thus, in the present invention, the flow channel and the propulsion arrangement o are arranged to take the liquid heat transfer medium from the fourth depth of the geothermal well S through the upper flow opening and transfer it. in the flow channel to the lower flow opening. Alternatively, in the present invention, the flow passage and propulsion arrangement are arranged to take A 30 liquid heat transfer medium through the lower flow opening and transfer it in the flow passage E to the upper flow opening at a fourth depth. © In one embodiment, the arrangement comprises one or more heat collector loops arranged in the S geothermal well and one or more N flow channels arranged in the geothermal well. S 35 Thus, a geothermal well comprises more than one separate heat collector loop and also more than one flow channel.
    The number of heat collector loops and the number of flow channels are not independent of each other, but can be freely selected. Increasing the number of flow channels can increase the recycling of liquid heat transfer medium in a geothermal well. Similarly, increasing the number of heat collector loops can increase - the amount of thermal energy taken from a geothermal well.
    The propulsion arrangement may comprise a pump, propeller or turbine or some other device capable of producing a flow of liquid heat transfer medium in the flow channel. Alternatively, the propulsion arrangement may be arranged to produce a pressure difference between the flow channel and the geothermal well, which pressure difference is arranged to transfer the liquid heat transfer medium in the flow channel.
    In one embodiment of the present invention, the propulsion arrangement is - arranged to circulate the liquid heat transfer medium upwards in the flow channel from the downstream opening towards the upper flow opening and from the lower part of the geothermal well to the upper part of the geothermal well.
    In another embodiment, the propulsion arrangement is arranged to circulate the liquid heat transfer medium downstream in the flow channel from the upper flow opening to the lower flow opening and from the top of the geothermal well to the bottom of the geothermal well.
    Thus, the high temperature liquid heat transfer medium can be transferred from the lower part of the geothermal well to the upper part of the flow channel geothermal well. Thus, a circulation of the liquid heat transfer medium is created, in which the high temperature liquid heat transfer medium flows upwards in the flow channel and the low temperature liquid heat transfer medium flows downwards in the geothermal well. o Alternatively, the low temperature liquid heat transfer medium S can be transported in the flow channel from the top of the geothermal well to the geothermal. to the bottom of the well. Thus, a circulation of the liquid heat transfer medium 2 is provided, in which the low temperature liquid heat transfer medium flows downwards in the A 30 flow channel and the high temperature liquid heat transfer medium flows upwards in the geothermal well. © Thus, the temperature of the liquid heat transfer medium in the geothermal well S becomes more uniform or balanced along the first depth of the geothermal well N. S 35 In one embodiment, the liquid heat transfer medium is water. Water is preferred because the geothermal well can be provided at least in part as a borehole, borehole, or hole in the soil such that the soil or rock forms at least a portion of the walls of the geothermal well.
    In addition, in one embodiment, the liquid heat transfer medium may be water and the primary working medium may be a refrigerant or ethanol or an alcohol-based working medium. The arrangement according to the present invention provides two separate cycles, one in the heat collector loop and the other in the geothermal well. Therefore, two different fluids can be used in the arrangement, which allow efficient heat transfer.
    In one embodiment, the ground hole provided in the ground is arranged - to form a geothermal well or at least a part of a geothermal well. Thus, the geothermal well may be a borehole or the like formed by drilling or excavating into the soil or rock. This allows efficient heat transfer between the soil and the liquid heat transfer medium when the liquid heat transfer medium is in direct contact with the soil in a geothermal well.
    In an alternative embodiment, the ground hole provided in the soil comprises a well pipe forming a geothermal well or at least a part of a geothermal well. The well pipe is arranged inside the earth hole so that the inner wall (s) of the well pipe define a geothermal well or part thereof. In one embodiment, the well pipe is provided in the upper part of the earth hole, where soft soil may be present and the earth hole itself forms a geothermal well in the lower part.
    A geothermal well may have a uniform cross-sectional area between the top and bottom. Alternatively, the geothermal well may have a decreasing cross-sectional area, such as a tapered shape, towards the lower end of the geothermal well.
    o In one embodiment, the geothermal well comprises a first S well section extending from the upper end of the geothermal well to the first well. to a depth, and a second well section extending from the first well section 2 toward the lower end of the well. The first well section has a first A 30 cross-sectional area and the second well section has a second cross-sectional area E. The first cross-sectional area is larger than the second © cross-sectional area. - In addition, the heat collector loop is = arranged S in the first well section and the flow channel can extend from the first well section N to the second well section. S 35 Thus, a heat collector loop may be provided in the first well section at the top of the geothermal well and having a larger cross-sectional area or diameter. The second well section extends from the first well section to the lower end of the geothermal well and is at the bottom of the geothermal well, and has a smaller cross-sectional area or diameter. The flow channel is arranged in the second well section or extends to the second well section from the first well section so that liquid heat transfer medium can be transferred from the second well section to the first well section or from the first well section to the second well section.
    In one embodiment, the flow channel is arranged in a geothermal well next to the heat collector loop. Thus, the flow channel is arranged - in a geothermal well parallel to the heat collector loop.
    In some embodiments, the flow passage comprises thermal insulation extending along the flow passage for at least a portion of the distance between the upper flow opening and the lower flow opening. In some embodiments, the flow passage comprises thermal insulation extending along the flow passage from the upper flow opening to the lower flow opening. The thermal insulation may surround the flow channel on the inner or outer surface of the flow channel or it may be provided between the inner surface and the outer surface of the flow channel. Alternatively, the flow channel may be a vacuum tube comprising a vacuum layer forming a thermal insulation.
    Thermal insulation allows high temperature liquid heat transfer medium to be transferred from the lower part or lower end of a geothermal well to the upper or upper end of the geothermal well at high temperature because thermal insulation prevents or reduces heat transfer from the liquid heat transfer medium flowing inside the flow channel. Similarly, thermal insulation allows low temperature liquid heat transfer medium to be transported — from the top or top of a geothermal well to the bottom or o bottom of a geothermal well at low temperature because thermal insulation prevents or reduces N heat transfer to the liquid flowing inside the flow channel. heat transfer medium. This makes heat transfer in geothermal well 2 more efficient. v 30 The arrangement may further comprise a heat pump connected to a heat collector loop E to transfer heat energy from the primary working medium. © Alternatively, the arrangement may comprise a heat pump and a secondary heat network S. The heat collector loop and the secondary heat network can be N connected to a heat pump to transfer heat energy from the heat collector loop S 35 to the secondary heat network.
    Thus, a heat pump, or alternatively a heat exchanger, can be utilized to transfer heat energy from the primary working fluid flowing in the heat collector loop. The advantage of the invention is that the liquid heat transfer medium, the flow channel and the propulsion arrangement = allow thermal energy to be taken - into the liquid heat transfer medium from the lower part of the geothermal well where the soil temperature is higher and from the upper part of the geothermal well with heat collector This allows the advantages of conventional geothermal heat exchangers with closed fluid loops that - utilize ethanol or other refrigerants and are not installed deep in the soil, and - installed at deep higher temperatures - geothermal heat exchangers.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in detail with reference to the accompanying drawings, in which Figure 1 schematically shows one embodiment of an arrangement according to the present invention; Figures 2, 3A, 3B and 4 schematically show different embodiments - of an arrangement according to the present invention; Figure 5 schematically shows the relative dimensions of one embodiment of the invention; and S | Figures 6 to 118 schematically show various embodiments of the arrangement according to the present invention N. 5 25 ©
    DETAILED DESCRIPTION OF THE INVENTION a Figure 1 schematically shows an arrangement for geothermal heating O. The geothermal heating arrangement comprises an earth hole 2 or a borehole provided in the soil 1 3 extending downwards into the soil 1 from the ground surface 3. S 30 - The earth hole 2 may be formed by drilling, drilling or some other> excavation method. It should be noted that in the figures, similar components and divisions are denoted by the same reference numerals and their explanation is not repeated in connection with each figure.
    Furthermore, in the present utility model, the ground hole 2 may be any type of hole extending into the soil 1, and may be a vertical hole, - a straight vertical hole or otherwise a straight hole extending into the soil 1 at an angle to the ground 3 or vertically. In addition, the ground hole 2 may comprise one or more bends or turns and the direction of the ground hole 2 may change one or more times along the length of the ground hole 2 towards the lower end 6 or bottom of the ground hole 2.
    The soil material at the lower end 6 of the soil hole 2 is generally rock material.
    Thus, the soil or rock material of the soil 1 can form the inner surface of the soil hole 2.
    In the present invention, the earth hole 2 is provided with a liquid heat transfer agent 17. Thus, the earth hole 2 forms a geothermal well 4 in which a liquid heat transfer agent is provided in the hole 2 extending to the soil 1. The geothermal well 4 or the earth hole 2 can be filled with a liquid heat exchanger from the upper end 5 to the lower end of the geothermal well 4 and the earth hole 6. Alternatively, the geothermal well 4 or earth hole 2 can be filled with liquid heat transfer medium 17 from the lower end 6 of the geothermal well 4 or earth hole 2 to a distance from the geothermal well 4 or earth hole - the opening 2 encloses or comprises a liquid heat transfer medium 17.
    The liquid heat transfer medium 17 may be water or another water-based or water-soluble liquid. Alternatively, the liquid heat transfer medium 17 may be another liquid substance. The present invention is not limited to any particular liquid heat transfer medium 17.
    o However, the liquid heat transfer medium 17 is preferably environmentally friendly N or non-hazardous, as it may be in the earth hole 2 or in the geothermal well 4. in direct contact with the ground.
    2 As mentioned above, the geothermal well 4 can be formed from a m 30 earth hole 2 provided with a liquid heat transfer medium 17.
    E Arrangement - for geothermal heating = further comprises © a heat collector loop 20 for circulating the primary working medium in the geothermal S well 4. The heat collector loop 20 is arranged in the geothermal well 4 and N at least partially in the liquid heat transfer medium 17.
    S 35 The heat collector loop 20 extends from the geothermal well 4, as shown in Fig. 1. The heat collector loop 20 can be connected to a heat exchanger or heat pump outside the geothermal well 4, as shown in Fig. 10.
    The heat collector loop 20 can be any known heat collector loop in which the primary working medium can be recycled.
    The heat collector loop 20 may comprise one loop having a first loop portion 22, or a downcomer extending downwardly and a second loop portion 24, or a riser extending upwardly in a geothermal well 4. The first loop portion 22 and the second loop portion 24 are interconnected by a first heat collector loop 20 with the coupling portion so that the heat collector loop 20 forms a U-loop or U-turn in the geothermal well 4.
    In an alternative embodiment, the heat collector loop 20 may comprise two or more turns, as shown in Figure 9. Thus, the heat collector loop 20 comprises a descent portion 22, one or more additional descent portions 25, one or more additional descent portions 27, and an ascending portion.
    24. One or more additional ascent portions 25 and one or more additional descending portions 27 are provided between the descending portion 22 and the ascending portion 24 of the heat collector loop 20. The descent portion 22, one or more additional ascent portions 25, one or more additional descending portions 27, and the ascending portion 24 are interconnected at their lower ends or at the lower end 26 of the heat collector loop 20 by first engagement portions 26. In addition, one or more additional ascending portions 25 and one or more with coupling sections 28.
    As mentioned above, the heat collector loop 20 may comprise one or more loop rounds 22, 24, 25, 27 or one or more U-turns arranged in the geothermal well 4 and the heat transfer medium o 17 in the geothermal well 4.
    S The primary working medium used in the heat collector loop 20 may be what. any refrigerant, ethanol or ethanol-based fluid or any other 2 suitable fluid working fluid that can be used as a working fluid in a geothermal A 30 heat exchanger. The closed heat collector loop 20 also allows the use of non-E environmentally friendly and more efficient working materials.
    © The primary working medium may also be water or an aqueous liquid or any other suitable liquid.
    N The heat collector loop 20 can be any pipe or S 35 hose loop in which the primary working fluid can be recycled inside the geothermal well 4. In addition, the arrangement may comprise one or more separate heat collector loops 20 arranged in the geothermal well 4. As shown in Figure 1, the arrangement for geothermal heating comprises a collector pump 30 arranged in connection with the heat collector loop 20 to recycle primary working fluid in the heat collector loop 20. to recycle the primary working medium. The collector pump 30 is arranged to circulate the primary working medium downwards in the downcomer section 22 and upwards in the upcomer section 24 in the heat collector loop 20 through the coupling section 26. thus - the collector pump 30 is provided or connected to the - heat collector loop 20 for circulating the primary = working fluid - in the heat collector loop 20.
    Alternatively, the collector pump 30 may be arranged to circulate the primary working fluid upward in the downcomer portion 22 and downwardly in the uplink portion 24 through the coupling portion 26 of the heat collector loop 20.
    The collector pump 30 may also be a reversible pump so that the flow direction of the primary fluid in the heat collector loop 20 can be changed by reversing the pumping direction of the reversible collector pump 30.
    The collector pump 30 is connected to a power supply 32, such as a motor on a power line 34, for driving the collector pump 30.
    Alternatively, the heat collector loop is provided with a first and a second heat collector pump (not shown) such that the first coil pump is - arranged = recirculated - primary = working fluid in the heat collector loop 20 in the downcomer 22 downstream and upstream of the upstream portion 24 o upwards in the lowering section 22 and downwards in the rising section 24 via the coupling section 26 N. . The arrangement for geothermal heating is further provided with 2 flow channels 10 provided in the geothermal well 4 or in the earth hole T 30 2. The flow channel 10 is arranged in the geothermal well 4 and E in the heat transfer medium 17. The flow channel 10 is further arranged to extend into the geothermal well 4 and the geothermal well 4 between the bottom. S The flow channel 10 may be a vertical flow channel, a straight vertical N or otherwise a straight flow channel extending in the geothermal well 4, or it may S 35 - extend at an angle to the vertical. In addition, the flow channel 10 may have one or more bends, and the direction of the flow channel 10 may change one or more times along the length of the flow channel 10. The flow passage 10 may have an upper end 18 and a lower end 19. Thus, the flow passage 10 may extend between the upper end 18 and the lower end 19 in a geothermal well 4. The flow passage 10 may be any pipe or hose capable of - circulating or transferring liquid heat transfer medium 17 within the flow passage. Thus, the flow channel 10 is arranged to circulate or transfer the liquid heat transfer medium 17 inside the flow channel 10 in the geothermal well 4. The flow channel 10 comprises an upper flow opening 11 and a lower flow opening 13. Thus, the liquid heat transfer medium 17 can be circulated in the flow channel 10 between the upper The liquid heat transfer fluid 17 may flow from the inflow channel 10 and outflow channel 10 of the upper flow opening 11 and a lower flow opening 13. Thus, the upper and alalempi flow opening 11, 13 provide - the flow path of the geothermal well 4 between and the flow channel between the 10 interior.
    An upper flow opening 11 can be provided in the upper part of the geothermal well 4 and a lower flow opening 13 in the lower part of the geothermal well 4. The upper and lower flow openings 11, 13 are inside the geothermal well 4 and preferably in the liquid heat transfer medium 17.
    The upper flow opening 11 may be arranged at the upper end 18 of the flow channel 10 and the lower flow opening 13 may be arranged at the lower end 19 of the flow channel 10, as shown in Fig. 1.
    The flow channel 10 may be a tube or hose with open ends 18, 19 forming flow openings 11, 13, as in Figure 1.
    Alternatively, the flow openings 11, 13 or at least one of them are arranged o differently and they, or at least one of them, can be arranged between the upper end 18 and the lower end 19 of the flow channel 10 S.
    . The flow channel 10 may be supported in the ground hole 2, in the vertical walls 2 of the ground hole 2, and / or in the structures of the ground hole 2 by support members 77 along the length of the flow channel 10 A 30. Alternatively or in addition, the flow channel 10 may be supported on the upper end 5 and / or the lower end 6 of the ground hole 2E or on some other support structures provided on the ground hole 2 or outside the ground hole 2.
    S In addition, the arrangement may comprise one or more separate N flow channels 10 arranged in the geothermal well 4. Alternatively, S 35 - or in addition the flow channel 10 may branch at or near the upper end 18 and / or lower end 19 into two or more branch channels (not shown).
    The arrangement according to the present invention further comprises a propulsion device 12 arranged in connection with the flow channel 10.
    Thus, the flow channel 10 is provided with a propulsion device 12 for circulating the liquid heat transfer medium 17 in the flow channel 10 inside the geothermal well 4.
    The propulsion device 12 is = arranged = to transfer = liquid heat transfer medium 17 along the flow channel 10 between the upper flow opening 11 and the lower flow opening 13 for circulating liquid heat transfer medium 17 in the geothermal well 4 between the upper part of the geothermal well 4 and the lower part of the geothermal well 4.
    At the lower end 6 of the geothermal well 4 the temperature of the soil 1 is higher than at the upper end 5 of the geothermal well 4 and the temperature gradually rises from the upper end 5 towards the lower end 6. Thus the liquid heat transfer medium 17 receives more heat energy at the lower end 6
    Thus, the flow channel 10 can be utilized by balancing the temperature of the liquid heat transfer medium 17 inside the geothermal well 4 by transferring the high temperature liquid heat transfer medium 17 from the lower part of the geothermal well 4 to the upper part of the geothermal well 4. to a power source 14, such as a motor on a power line 16, to drive a propulsion device 12.
    The propulsion device 12 may be a pump, propeller or turbine or the like - capable of circulating the liquid heat transfer medium 17 through the flow channel 10.
    N ”The propulsion device 12 can also be an reversible propulsion device 12 so that the flow direction of the liquid heat transfer medium 17 through the flow channel 10 2 can be changed by changing the v 30 pumping or operating direction of the reversible propulsion device 12.
    E Alternatively, the flow channel 10 may be provided with first and second propulsion devices (not shown) such that the first propulsion device S is arranged to circulate the liquid heat transfer medium 17 downwards along the flow channel 10, and the second propulsion device is arranged to circulate S 35 - liquid heat transfer medium upwards, vice versa.
    As mentioned above, the propulsion device or devices 12 may be arranged to circulate the liquid heat transfer medium 17 upwards in the flow channel 10 from the lower flow opening 13 towards the upper flow opening 11 and from the lower part of the geothermal well 4 to the upper part of the geothermal well 4.
    Thus, the liquid heat transfer medium 17 may enter the flow passage 10 through the lower flow opening 13 and discharge from the flow passage 10 through the upper flow opening 11. Alternatively, the propulsion device or devices 12 are arranged to circulate the liquid heat transfer medium 17 downstream of the upper flow opening lower part 4. Thus, the liquid heat transfer medium 17 can enter the flow channel 10 through the upper flow opening 11 and discharge from the flow channel 10 through the lower flow opening 13.
    Figure 2 shows a cross-sectional view of the geothermal well 4 along the line A-A in Figure 1.
    The geothermal well 4 comprises one flow channel 10 extending in the geothermal well 4 and one heat collector loop 20 with a downcomer 22 and a riser 24. This configuration may be optimal to utilize the cross-sectional area of the geothermal well 4.
    Figure 3A shows a cross-sectional view of another geothermal well 4 along line A-A.
    The geothermal well 4 comprises two flow channels 10 extending in the geothermal well 4 and one heat collector loop 20 with a downcomer 22 and a riser 24. Figure 3B shows a cross-sectional view of another geothermal well 4 along line A-A.
    The geothermal well 4 comprises one flow channel 10 extending in the geothermal well 4 and two heat collector loops 20 with a downcomer 22 and a riser 24. o Figure 4 shows a cross-sectional view of another geothermal S well 4 along the line A-A.
    The geothermal well 4 comprises three flow channels. 10, extending in the geothermal well 4, and two heat collector loops 20, having a descent portion 22 and an ascent portion 24. = 30 In the embodiments of Figures 3B and 4, there may alternatively be one E heat collector loop 20 having a descent portion 22, one or more additional ascending portions 25, one or more additional descending portions 27, and an ascending portion 24. S The diameter 2 can be, for example, 100 N to 200 mm.
    The diameter of the flow channel 10 can be, for example, 30 to 70 mm.
    S 35 —The diameter of the tube of the heat collector loop 10 may be, for example, 20-50 mm.
    Figure 5 schematically shows the dimensions or relative dimensions of an arrangement according to the present invention.
    The geothermal well 4 or earth hole 2 has a first depth A between the upper end 5 of the geothermal well 4 and the lower end 6 of the geothermal well 4, or from the ground 3. The first depth A may be at least 300m or at least 500m. Alternatively, the first depth A may be between 300 m and 3000 m or between 500 m and 2500 m. Thus, higher temperatures can be achieved at the lower end 6 of the geothermal well 4.
    The heat collector loop 20 is arranged to extend into the second depth B of the geothermal well 4 from the upper end 5 of the geothermal well 4. The second depth B - may be equal to or less than 75% of the first depth A. Alternatively, the second depth B may be between 5 and 75% of the first depth A or preferably between 5 and 60% of the first depth A.
    Recirculation of the liquid heat transfer medium 17 in the geothermal well 4 through the flow channel 10 and the propulsion device 12 allows the high-temperature liquid heat transfer medium 17 to be fed to the heat collector loop 20 from the lower end 6 of the geothermal well 4.
    According to the present invention, the lower flow opening 13 of the flow channel 10 is provided in the geothermal well 4 to a third depth E from the upper end 5 of the geothermal well 4. The third depth E is equal to or greater than the second depth B or at least 75% of the first depth A or preferably at least 80% of the first depth A. Alternatively, the third depth B is between 75% and 100% of the first depth A or preferably between 90% and 100% of the first depth A. Thus, the lower flow opening 13 is at the same distance or greater from the upper end 5 of the geothermal well 4 than the lower end 26 of the heat collector loop. S The upper flow opening 11 of the flow channel 10 is provided. in the geothermal well 4 to a fourth depth C from the upper end 2 of the geothermal well 4. 2. The fourth depth C is less than the second depth B. In addition, the fourth depth C may be A 30 less than 50% of the first depth A or preferably less than E 25% of the first depth A. Alternatively the fourth depth C may be between 00 0-30% of the first depth A or preferably between 0% and 20% of the first depth SA. N The third depth E is equal to or greater than the second depth B and S 35 - the fourth depth C is smaller than the second depth B so that higher temperatures of the liquid heat transfer medium 17 can be utilized from the lower or lower end 6 of the geothermal well 4. In addition, the upper flow opening 11 and the upper end 18 may be at the same level in the geothermal well 4, which means that the upper flow opening 11 is arranged in the upper end 18 of the flow channel 10, as shown in Fig. 1.
    Alternatively, the upper flow opening 11 may be arranged in the side wall of the flow channel 10 and at a distance from the upper end 18 of the flow channel 10 towards the lower end 19 of the flow channel 10, as shown in Fig. 6.
    Accordingly, the lower flow opening 13 and the lower end 19 of the flow channel 10 may be at the same level in the geothermal well 4, which means that the lower flow opening 13 is arranged at the lower end 19 of the flow channel 10, as shown in Fig. 1.
    Alternatively, the lower flow opening 13 may be arranged in the side wall of the flow channel 10 and at a distance from the lower end 19 of the flow channel 10 towards the upper end 18 of the flow channel 10, as shown in Fig. 6.
    Fig. 6 shows an embodiment of an arrangement in which the upper flow opening 11 and the lower flow opening 13 are arranged in the side wall of the flow channel 10 and / or between the upper end 18 and the lower end 19 of the flow channel 10.
    Thus, the upper flow opening 11 is arranged in the side wall of the flow channel 10 and at a distance from the upper end 18 of the flow channel 10 towards the lower end 19 of the flow channel 10. The lower flow opening 13 is arranged on the side wall of the flow channel 10 and at a distance from the lower end 19 of the flow channel 10 towards the upper end 18.
    These dimensions and relative dimensions described in connection with Fig. 5 apply to the upper flow opening 11 and the lower flow opening 13 of Fig. 6. As mentioned above, the upper flow opening 11 and the lower flow opening 13 are arranged between the upper end 18 and the lower end 19 of the flow channel 10. o In addition, the flow channel 10 can also extend from the upper end 5 of the geothermal well 4 or the earth hole 2 S to the lower end 6 of the geothermal well 4 or the earth hole 2. As shown in Fig. 6, the geothermal well 4 may be provided with 2 mixers 50 for mixing the liquid heat transfer medium 17 inside the geothermal well 30.
    The mixer 50 may be provided in the liquid E heat transfer medium 17 for mixing the high temperature and low temperature liquid heat transfer medium 17.
    S The agitator 50 may be any known agitator, such as a propeller N or the like, which provides a rotational motion or a linear thrust motion S 35 - to the liquid heat transfer medium 17. The agitator 50 may be connected to the agitator power supply 54 via the agitator connection line 52. Agitator power supply
    54 can be any known power source, such as a motor.
    The agitator 50 may be arranged at any depth in the geothermal well 4 from the upper end 5 of the geothermal well 4. However, in a preferred embodiment, the agitator 50 is arranged in the upper part of the geothermal well 4 and heat collector loop 20 or adjacent. Thus, the mixer 50 can be arranged between the upper end 5 of the geothermal well 4 and the second depth B.
    The mixer 50 may be arranged to provide a horizontal mixing force to the liquid heat transfer medium 17, as shown in Figure 6. Thus, the axis of rotation or the propulsion axis of the mixer 50 is in the horizontal direction.
    Alternatively, the mixer 50 may be arranged to provide a vertical mixing force to the liquid heat transfer medium 17, as shown in Figure 7. Thus, the axis of rotation or propulsion axis of the mixer 50 is in the vertical direction.
    In addition, the stirrer 50 may be arranged to provide a stirring force to the liquid heat transfer medium 17 in an angle at an angle to the vertical and horizontal directions. Thus, the axis of rotation or propulsion axis of the mixer 50 is at an angle to the vertical and horizontal directions.
    In the embodiments of Figures 1, 5, 6, 8 and 10, the geothermal well 4 has a — uniform cross-sectional area between the upper end 5 and the lower end 6 of the geothermal well 4. This means that the diameter of the geothermal well 4 or the earth hole 2 remains the same at the depth A of the geothermal well 4 between the upper end 5 and the lower end 6 of the geothermal well 4.
    Figure 7 shows an alternative embodiment in which the geothermal well 4 comprises a first well section 8 extending from the upper end 5 of the geothermal well 4o to the upper well depth F and a second well section 7 extending S from the first well section 8 towards the lower end 6 of the geothermal well 4. . The first well section 8 has a first cross-sectional area 1 and 2, the second well section 7 has a second cross-sectional area K. The first A30 - cross-sectional area I is larger than the second cross-sectional area K, as shown in Fig. 7. © The first well section 8 has a first lower end 9 at an upper S well depth F from the upper end 5 of the geothermal well 4. The second well section 7 extends to the lower end 6 and the first depth A of the N geothermal well 4. S 35 As shown in Fig. 7, a heat collector loop 20 is arranged in the first to the well section 8. Thus, the second depth of the heat collector loop 20
    B is equal to or less than the upper mining depth F.
    The flow channel 10 is arranged to extend from the first well section 8 to the second well section 7. Respectively, the upper end 18 of the flow channel 10 is in the first well section 8 and the lower end 19 of the flow channel 10 is in the second well section 7.
    In addition, the upper flow opening 11 of the flow channel 10 is arranged in the first well section 8. Thus, the upper flow opening 11 of the flow channel 10 is arranged in the geothermal well 4 at four depths C from the upper end 5. The fourth depth C is smaller than the second depth B and smaller than the upper well depth F.
    - Thus, the upper flow opening 11 of the flow channel 10 is arranged in the first well section 8 between the first lower end 9 of the first well section 8 of the upper end 5 of the geothermal well 4.
    The lower flow opening 13 of the flow channel 10 is arranged in the second well section 7. Thus, the lower flow opening 13 of the flow channel 10 is arranged - in the geothermal well 4 to a third depth E from the upper end of the geothermal well 4.
    5. The third depth E is greater than the second depth B and greater than the upper well depth F. Thus, the lower flow opening 13 of the flow channel 10 is arranged in the second well section 7 between the first lower end 9 of the first well section 8 and the lower end 6 of the geothermal well 4. In an alternative embodiment, the geothermal well 4 may have a decreasing cross-sectional area towards the lower end 6 of the geothermal well 4. The decreasing cross-sectional area may be provided by a tapering geothermal well 4 or land hole 2 or a progressively tapered structure. 10 comprises o a thermal insulation 15 extending along the flow channel 10 by at least a part of the distance S between the upper flow opening 11 and the lower flow opening 13. . The thermal insulation 15 may extend along the flow channel 10 from the upper 2 flow opening 11 to the lower flow opening 13 or from the upper end of the flow channel 10 to the lower end 19. E Alternatively, the thermal insulation 15 may be provided from the upper flow opening 11 towards the lower flow opening 13 towards the lower end 19 at a distance N from the lower end 19. In one embodiment, the thermal insulation 15 may extend in the first well section 8 or from the upper end 18 or the upper flow opening 11 to the second depth B or the upper well depth F.
    In addition, alternatively, the thermal insulation 15 may extend from the lower flow opening 13 towards the upper flow opening 11 to a distance from the upper flow opening 11 or from the lower end 19 towards the upper end 18 at a distance from the upper end.
    18. In one embodiment, the thermal insulation is provided in the second well section 9 or from the lower end 19 or lower flow opening 13 to the upper well depth F or alternatively to the second depth B. The thermal insulation 15 may be any known thermal insulation provided on the outer surface or surface of the flow channel 10 or between the outer surface. Alternatively, the flow channel 10 - can be formed from a vacuum tube with a vacuum insulating layer. In the embodiments of Figures 1-9, the soil 1 of the earth hole 2 is arranged to form a geothermal well 4 or at least a part of a geothermal well 4. As shown in Figure 10, the earth hole 2 comprises a well pipe 80 forming a geothermal well 4 or at least part of a geothermal well 4. extending from the upper end 5 of the ground hole 2 to the lower end 6 of the ground hole 2. In another embodiment, the well pipe 80 may extend from the upper end 5 towards the lower end 6 and the distance from the lower end 6. Thus, the well pipe 80 may be arranged in a part of the ground hole 2 with loose or soft soil. As shown in Figure 10, the arrangement may comprise a heat pump 60 connected to a heat collector loop 20 for transferring heat energy from the primary working medium. In addition, there may be a secondary heat network 70, and the heat collector loop 20 and the secondary heat network 70 may be connected to a heat pump 60 to transfer heat energy from the heat collector loop 20 to the secondary heat network 70 or to a secondary fluid flowing in the secondary heat network 70. with a known heat exchanger. Fig. 11 shows an alternative embodiment in which the A 30 - propulsion arrangement comprises a liquid heat transfer medium source 90 connected E - to the upper end of the flow channel 10 via the connection channel 91. In this embodiment, the flow channel 10 does not include an upper flow opening but only a lower flow opening 13. arranged N to a third depth E. The source of liquid heat transfer medium 90 may be a vessel, S 35 - a natural source of liquid or water, such as a river, lake or the like, or another geothermal well. The source of liquid heat transfer medium 90 can be arranged at a higher level or height than the geothermal well 4 so that the liquid heat transfer medium can be transferred or flow into the flow channel 10 and the lower flow opening 13 by gravity. Alternatively, the liquid heat transfer medium source 90 is provided with a pressure device to provide a pressure difference - between the flow channel 10 and the geothermal well 4 to transfer new liquid heat transfer medium from the liquid heat transfer source 90 along the flow channel 10 to the lower flow port 13. The pressure device can be any known device. 10 and a geothermal well 4, such as a pump or the like. In the embodiment of Figure 11, the new liquid heat transfer medium is supplied to the geothermal well 4 from the liquid heat transfer medium source 90 through the communication channel 91 and the flow channel 10 to the lower part of the geothermal well 4. In this case, the excess liquid heat transfer medium must also be removed from the geothermal well 4. The geothermal well 4 can be provided - with an outlet channel 92. The outlet channel 92 can be arranged at the upper end 5 of the geothermal well 4 or at the top of the geothermal well 4. Excess liquid heat transfer medium, which has been displaced or replaced by new liquid heat transfer medium from the liquid heat transfer medium source 90, is removed from the geothermal well 4 through the discharge channel 92. Thus, the liquid heat transfer medium can be removed from the upper end 4 of the geothermal well. This liquid heat transfer medium at the upper end of the geothermal well can be at a lower temperature than the liquid heat transfer medium at the lower end of the geothermal well 4. The outlet duct 92 can also be connected to a liquid heat transfer medium source 90 or a connection duct 91 for circulating liquid heat transfer medium outside the geothermal well 4. o In the flows shown in Figures 1-11, the flow channel 10 is arranged in the S geothermal well 4 next to or in parallel with the heat collector loop 20. with the heat collector loop 20. 2 The invention is not limited to the examples given above, A 30, but many modifications are possible while remaining within the scope of the inventive idea defined by the protection claims E. O S OF
    N> ”
    权利要求:
    Claims (5)
    [1]
    A geothermal heating device, the device comprising: - a geothermal well (4), which extends into the soils (1), and which geothermal well (4) is provided with liquid heat carrier (17), the geothermal well (4) has a first depth (A) between the upper end (5) of the geothermal well (4) and the lower end (6) of the geothermal well (4), characterized in that the first depth (A) is at least 300 m, and the device further comprises: heat collector loop (20) for circulating the primary working medium in the geothermal well (4), which heat collector loop (20) is arranged in the geothermal well (4) and arranged to extend to the second depth (B) in the geothermal well (4), which second depth is equal to or less than 75% of the first depth; flow channel (10), which is arranged in the geothermal well (4), which flow channel (10) comprises an upper flow opening (11) and a lower flow opening (13), and which flow channel (10) extends in the geothermal well (4). ) between the upper part of the geothermal well (4) and the lower part of the geothermal well (4) so that the lower flow opening (13) has been provided at the third depth (E) in the geothermal well (4), which third depth (E) is greater than other depths (B); and - operating device (12, 90), which is arranged in connection with the flow channel (10), which operating device (12, 90) is arranged to move the liquid heat carrier (17) along the flow channel (10) between the upper and the flow opening (11). ) and the lower flow opening (13) for circulating the liquid heat carrier (17) in the geothermal well (4) between the upper part of the N geothermal well (4) and the lower part of the geothermal well (4).
    O S 30
    [2]
    Device according to protection claim 1, characterized in that the lower flow opening (13) of the flow channel (10) is arranged in the co-geothermal well (4) at the third depth (E) of the geothermal well (4) from the upper end of the geothermal well (4). (5), which third depth (E) is: N - at least 75% of the first depth (A) or presumably at least 80% of the first S - depth (A); or
    between 75-100% of the first depth (A) or presumably between 90-100% of the first depth (A).
    [3]
    Device according to claim 1 or 2, characterized in that the upper flow opening (11) of the flow channel (10) is arranged in the geothermal well (4) at the fourth depth (C) of the geothermal well (4) from the upper end of the geothermal well (4). (5), which fourth depth (C) is: - less than the second depth (B); or - less than 50% of the first depth (A), or presumably less than 25% - of the first depth (A); or - between 0% - 30% of the first depth (A) or for example between 0% -20% of the first depth (A).
    [4]
    Device according to one of Claims 1 to 3, characterized in that: - the flow channel (10) comprises the thermal insulation (15), which the thermal insulation (15) extends along the flow channel (10) at least on a part of the length between the upper flow opening ( 11) and the underflow opening (13); or - the flow channel (10) comprises the thermal insulation (15), which - the thermal insulation (15) extends along the flow channel (10) from the upper flow opening (11) to the lower flow opening (13).
    [5]
    Device according to one of Claims 1 to 4, characterized in that: - the flow channel (10) is arranged in the geothermal well (4) - next to the heat collector loop (20), o - the flow channel (10) is arranged in the geothermal well (4) S parallel to the heat collector loop (20).
    N
    Sat.
    I + © 30
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