• 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 utilizing geothermal heat, which arrangement comprises a closed heat collection circuit (14) placed in a heat well (10), which is arranged higher than the bottom (15) of the heat well (10) and the heat well comprises devices (26) for transferring heat upwards. from the lower part of the heat well (10), characterized in that the devices (26) comprise a circulation circuit (16), which comprises circulation pipes (18, 19), one of which is located at a collector (11) included in the heat collection circuit (14) and the second closer to the bottom (15) of the heat well (10), and the arrangement further comprises a protective tube (17), which extends from the ground surface substantially to the depth of the entire heat well (10) and inside which the heat collection circuit (14) and the circulation circuit (16) are arranged. . In addition, the protection requirements 2-5.
    公开号:FI13030Y1
    申请号:FIU20214073U
    申请日:2021-06-24
    公开日:2021-10-08
    发明作者:Veli-Pekka Vähäkangas
    申请人:Kaivonporaus Olympia Oy；
    IPC主号:
    专利说明:

    The invention relates to an arrangement for the utilization of geothermal energy, which arrangement comprises a closed heat collection circuit located in a heat well arranged above the bottom of the heat well and the heat well comprising means for transferring heat from the bottom of the heat well.
    Efforts have been made to increase the depth of thermal wells in order to make more efficient use of geothermal energy. Technically, it is also possible to drill a deep hole, even if the cost per meter increases the deeper it is drilled. In addition, the deeper the heat recovery circuit becomes, the more challenging the transfer of geothermal energy becomes. The operating temperature of the submersible pump quickly reaches. The plastic pipes in the heat recovery circuit can withstand higher temperatures than the submersible pump, but as the pressure increases, the pipes flatten, which prevents or at least slows down the flow.
    The object of the invention is to provide a new type of arrangement for the utilization of a geolamp, which is even more efficient and reliable and which operates in even deeper heat wells with better efficiency than before. The characteristic features of the arrangement according to the invention appear from the appended protection requirement. The arrangement enhances the transfer of heat O in the heat well, thus keeping the heat collection circuit s simple. In addition, the charging of the heat well is simpler than before. Even when there is no heat demand N, it is possible to transfer heat from the upper end of the heat well to the lower end of the main well. In addition, the two-circuit system enables a separate circuit for heating and cooling. At the same time, one circuit can store energy and the other can deliver it.
    The invention will now be described in detail with reference to the accompanying drawings, which illustrate an embodiment of the invention. Figure 1 shows an arrangement according to the invention in connection with a heat well, Figure 2a shows a partial enlargement of a modification of the arrangement according to the invention, Figure 2b shows a part of a known heat collection circuit.
    Figure 1a shows an arrangement according to the invention for the utilization of geothermal energy. One heat well 10 is shown here, but the arrangement may include several heat wells. A heat well is a hole drilled in the bedrock in which the means for transferring heat are installed. The heat well has a collector 11 consisting of two parallel pipes connected to each other at their lower ends. In this case, a closed heat recovery circuit is formed, in which fluid is circulated to transfer heat from the heat well to the ground. The ground surface has a heat exchanger 12 or a ground source heat pump, by means of which heat is transferred to the heating network of the buildings 13. In the invention, the collector 11, more generally the heat recovery O 25 circuit 14 is arranged above the bottom 15 of the heat well 10 and the O arrangement comprises means 26, more specifically a circulation circuit 16 for transferring heat from the lower part z of the heat well 10. In the embodiment shown, a fluid in the heat well, such as water, is pumped from the collector and pumped to the bottom of the heat well. Thus, the heat is transferred in the heat well towards the collector and further on to the ground in the heat recovery circuit. Thus, the arrangement includes two circuits adapted for cooperation. Fluid, such as water, can also be recycled by pumping from top to bottom, as the recirculation can occur in both directions.
    When recycling, gravity helps in recycling.
    When the cold return fluid is led to the bottom of the heat well, it forces the warm water to rise upwards towards the collector.
    In this case, the temperature on the collector rises and increases the efficiency of the arrangement.
    Figure 2a shows a more detailed application of the arrangement.
    Here, a protective tube 17 is used, which extends substantially above the ground to the lower part of the heat well.
    Both the collector 11 and the circulating tubes 18 and 19 are located inside the protective tube.
    The protective tube has a bottom weight 20 as in the collector, so that the tubes remain in place despite the lift.
    Here is a bottom-weight protective tube 17, inside which closed turns take place.
    In other words, the protective tube is closed at its lower end.
    Thanks to the closed protective pipe, the water seeping into the heat well and flowing out of the environment remains outside the protective pipe.
    In this case, the circuit can also be made closed, in which case a fluid other than water can be used.
    In the heat recovery circuit, the fluid is preferably a mixture of water and ethanol, whereby the fluid remains flowing even at a negative degree.
    The protective pipe can be replaced by concreting the heat well.
    In this case, the protective pipe consists of concreting the heat well.
    In addition, the recycling works without a protective pipe or concreting, but in this case contaminants can enter the circulation circuit from the heat well, which hinders the pumping and heat exchange. x a n The circuit is primarily for circulating fluid in a thermal S 30 well.
    In the embodiment of Fig. 1, in addition to the pump 21 N, a heat exchanger 22 is arranged in the circuit 16, in which case, for example, the waste heat of the buildings can be transferred to the circuit and thus a heat well can be charged.
    On the other hand, cool water can be used to cool a building.
    Therefore, the circuit can be used in both directions. Solid arrows indicate the first direction of rotation and dashed arrows indicate the second direction of rotation. The same logic works in the collector tubes 23 and 24.
    For example, a pair of tubes shown in Figure 2b can be used in the collector, with a base 25 between the tubes 23 and 24 to keep the tubes apart. In addition, the pipes are oval, so they can fit in even a small borehole. The tubes are, for example, PU plastic, as are the tubes of the circuit and the protective tubes, but other materials can also be used. In addition, traditional € round tube collectors can be installed in the arrangement, where the tubes are detached or supported. In the arrangement, the depth of the heat well is 400 to 10,000 meters. The collector is placed at a depth of about 200 to 5000 meters. Preferably, the remainder of the heat well can be drilled with a smaller drill bit than the initial part. This significantly reduces drilling costs. For example, the diameter of the initial part may be 220 mm, while the diameter of the final part is, for example, 115 mm. Depending on the depth of the heat well, whether the heat well is drilled with the same diameter from the top to the bottom of the heat well or whether the hole size is changed to a smaller size when going down.
    - Recycling is also possible with only one pipe in the heat sink, for example by means of air or a similar fluid in a partially open or closed system. In this case, use a suitable pump or pressure generator if necessary.
    x a n In an internal closed collection circuit (collector), S 30 water or a lighter substance can be used. The internal heat recovery circuit N operates in such a way that the pump circulates fluid, S heat recovery fluid through the exchanger to the collection circuit. In the internal, closed heat recovery circuit, water and all suitable substances in their various states can be recycled. Kol-
    A thermal well cap that insulates the surface water and protects the internal circulation is installed at the upper end of the lecturer. In the external circulation circuit, the heat recovery medium circulates through the pump and the circulation pipe (s), bringing heat from the bottom of the heat well 5 upwards to the internal heat recovery circuit. The circuit can also be adapted as a heat recovery circuit, in which case the arrangement has two closed heat recovery circuits, which significantly increases the efficiency of the arrangement. The internal and external collection circuit can be made of all suitable materials. In a two-circuit system, an exceptionally frost-resistant heat transfer medium can be used in the external collection circuit for deep-hole systems currently on the market, which can be negative. A negative return flow has previously been known in shallow heat wells. In addition, in the arrangement in the external collection circuit of the heat well, the energy at the bottom of the heat well can be charged to the internal collection circuit even when no energy is taken from the heat well. In this way, the energy of the deep hole can be utilized more comprehensively. OF O OF
    O <Q + OF
    I Jami a O
    KK oO + OF O OF D
    权利要求:
    Claims (5)
    [1]
    An arrangement for the utilization of geothermal, the arrangement comprising a closed heat recovery circuit (14) located in the heat well (10) and arranged above the bottom (15) of the heat well (10) and the heat well comprising means (26) for transferring heat to the heat well (10). ) from the lower part, characterized in that the means (26) comprise a circulation circuit (16) comprising circulation tubes (18, 19), one of which is located at the collector (11) belonging to the heat recovery circuit (14) and the other closer to the heat well (10) the base (15), and the arrangement further comprises a protective tube (17) extending from the ground to substantially the entire depth of the heat well (10) and into which the heat collection circuit (14) and the circulation circuit (16) are arranged.
    [2]
    Arrangement according to Claim 1, characterized in that the protective tube (17) is closed at its lower end.
    [3]
    Arrangement according to Claim 1 or 2, characterized in that the protective tube (17) consists of concreting the heat well (10).
    [4]
    Arrangement according to one of Claims 1 to 3, characterized in that the O 25 recyclable fluid in the closed heat recovery circuit (14) is a mixture of 25 to 35% ethanol and the remainder water. Arrangement according to one of Claims 1 to 4, characterized in that a heat exchanger S 30 (22) is arranged in the circuit (16) to charge the heat well (10).
    [5]
    S> ”
    类似技术:
    公开号 | 公开日 | 专利标题
    US4392531A|1983-07-12|Earth storage structural energy system and process for constructing a thermal storage well
    EP2649311B1|2018-04-18|Passive heat extraction and power generation
    US8820394B2|2014-09-02|Convection enhanced closed loop geothermal heat pump well
    US4566532A|1986-01-28|Geothermal heat transfer
    JP5990652B2|2016-09-14|Operation method of fluid storage equipment
    KR20090110904A|2009-10-23|Multi-faceted designs for a direct exchange geothermal heating/cooling system
    US8997491B2|2015-04-07|Power generation system
    WO2012140324A1|2012-10-18|Apparatus for implementing a ground source heat system and method for exploiting the same
    GB2058334A|1981-04-08|Method of extracting heat from the earth and apparatus for performing the method
    FI13030Y1|2021-10-08|Arrangement for utilisation of geothermal heat
    US10598160B2|2020-03-24|Systems and methods of generating electricity using heat from within the earth
    CN109812998A|2019-05-28|A kind of mid-deep strata high efficient heat exchanging geothermal well system
    CN109340864A|2019-02-15|A kind of mid-deep strata and shallow layer geothermal energy combined heat and shallow layer geothermal energy concurrent heating system
    CN110986401B|2020-11-06|Geothermal resource development system adopting multi-branch radial horizontal well and method thereof
    CA1166242A|1984-04-24|Geothermal heat transfer
    EP2896910A1|2015-07-22|Geothermal probe
    CN104235801A|2014-12-24|High-power LED | phase-change temperature control device with heat pipes
    US20180080686A1|2018-03-22|Support member with dual use rebar for geothermal underground loop and methods
    FI13055Y1|2021-11-10|Arrangement for utilizing geoheat
    CN209689222U|2019-11-26|Shallow layer geothermal energy based on surface water body utilizes device
    KR20080041611A|2008-05-13|Geothermal heat exchanger
    KR20090111782A|2009-10-27|Heat pipe-type geothermal heat exchanger
    RU2701029C1|2019-09-24|Method of petrothermal heat extracting
    RU51637U1|2006-02-27|GEOTHERMAL HEAT PUMP SYSTEM OF HEAT SUPPLY AND COOL SUPPLY OF BUILDINGS AND STRUCTURES
    CN202547093U|2012-11-21|Heating water tank for water source heat pump
    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-10-08| FGU| Utility model registered|Ref document number: 13030 Country of ref document: FI Kind code of ref document: U1 |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20205749|2020-07-10|
    [返回顶部]