CN210441697U - Water well type spiral ground heat exchanger and heat exchange system - Google Patents
Water well type spiral ground heat exchanger and heat exchange system Download PDFInfo
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- CN210441697U CN210441697U CN201920768106.4U CN201920768106U CN210441697U CN 210441697 U CN210441697 U CN 210441697U CN 201920768106 U CN201920768106 U CN 201920768106U CN 210441697 U CN210441697 U CN 210441697U
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Abstract
The utility model provides a water well type spiral ground heat exchanger and a heat exchange system, wherein the water well type spiral ground heat exchanger comprises a heat storage device, a heat exchange device and a heat transfer device; the heat storage device comprises a well cover and a shaft with the lower end arranged in a sealing cover manner, the shaft is used for being arranged in a drilled hole, heat-conducting liquid is filled in the shaft, the wall of the shaft is in heat conduction with surrounding rocks so as to enable the heat-conducting liquid to exchange heat with the surrounding rocks, and the well cover covers the upper end of the shaft; the heat exchange device comprises a buried pipe, wherein the buried pipe is arranged in the shaft so as to enable water in the buried pipe to exchange heat with the heat-conducting liquid; the heat transfer device comprises a second water inlet pipe and a second water outlet pipe, one end of the second water inlet pipe is connected with the water inlet end of the buried pipe, one end of the second water outlet pipe is connected with the water outlet end of the buried pipe, and the other ends of the second water inlet pipe and the second water outlet pipe are used for being connected with the heat pump system. The utility model has the advantages that: the heat exchange performance of the ground heat exchanger is improved.
Description
Technical Field
The utility model relates to a be used for ground source heat pump heat transfer system technical field, especially relate to a well formula spiral ground heat exchanger and heat transfer system.
Background
The energy problem in the world is an important factor for restricting the development of the economic society, and the concept of green, healthy and sustainable development gradually enters the visual field of the public. The excessive use of traditional fossil fuels causes the emission of a large amount of greenhouse gases, so that the search for clean, renewable, widely distributed and high-reserve energy sources is urgent. Geothermal resources are one of new energy sources in an energy family, are not only important energy minerals, but also renewable, clean and environment-friendly green energy sources. The reasonable utilization of geothermal resources is an important strategic measure for relieving resource constraint and environmental pressure and realizing economical development, clean development, safe development and sustainable development. The shallow geothermal energy resource is widely applied at home and abroad at present, the technology is relatively mature, the temperature of the shallow geothermal energy is slightly higher than the local average temperature by 3-5 ℃, the temperature is relatively stable, the distribution is wide, the development and the utilization are convenient, and the development and the utilization prospect is very wide.
The shallow geothermal energy is mainly utilized by converting a low-grade heat source existing in a stratum into a high-grade heat source which can be utilized through a heat exchange mode of a heat pump technology, so that heat supply and refrigeration can be realized. The shallow geothermal energy is developed, the energy consumption structure of China can be improved, and the emission of carbon dioxide is reduced. Compared with the foreign countries, the development of shallow geothermal energy by utilizing the ground source heat pump technology in China is fast although the development is late, the range is wide, and the scale is far beyond the foreign countries.
The ground heat exchanger is used as the most important component of a heat pump system and directly participates in determining the heat exchange efficiency of a heat pump unit. In engineering practice, the arrangement mode of the buried pipes generally comprises a horizontal mode and a vertical drilling mode, and the horizontal mode and the vertical drilling mode respectively have advantages and disadvantages. The underground buried depth is shallow in a horizontal mode, but the occupied area is large, so that the waste of land resources is caused; in contrast, vertical buried pipes occupy a small footprint and underground boreholes typically have depths greater than 100 meters. In contrast, vertical drilling is common. When the buried pipe is buried underground in the drilling hole, a backfill material is needed to fill the drilling hole gap, otherwise, the heat exchange efficiency of the heat pump unit is reduced, and meanwhile, the surface water infiltrates to cause the pollution of underground water. The backfill material of the ground source heat pump heat transmitter is a key factor for the good and bad heat exchange effect of the ground source heat pump heat exchanger. The backfill material of the heat exchanger of the ground source heat pump of the buried pipe is a heat transfer medium for connecting the heat exchanger and a soil layer, and the performance of the heat transfer performance of the backfill material directly influences the performance of the whole heat exchanger.
In fact, the existing ground heat exchangers are arranged in a horizontal mode and a vertical mode from a drilling mode, but according to the field situation, the arrangement mode commonly used in engineering is the vertical arrangement mode. The laying of the buried pipe is provided with a single U-shaped and a double U-shaped, the middle of the buried pipe and the surrounding rock and soil media is backfilled by concrete, quartz sand, phase change materials, bentonite and other materials, and the buried pipe heat exchanger is formed by the combination of the single U-shaped and the double U-shaped, the drilling depth of the heat exchanger is generally within the range of 100 plus 200m, the drilling cost is increased along with the increase of the drilling depth, and thus the initial investment of the heat pump is greatly increased; another type of heat exchanger is an energy pile, i.e. a ground pipe is tied to a reinforcement cage and then concrete is poured as part of the building foundation, the length of the ground pipe heat exchanger generally depends on the length of the pile, and the ground pipe has the form of single U, double U, W and spiral. But the heat exchange performance of the energy pile is influenced by the load of the building to a certain extent, and the heat exchange performance is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a well formula spiral ground heat exchanger aims at improving ground heat exchanger's heat transfer performance.
An embodiment of the utility model provides a well formula spiral ground heat exchanger, include:
the heat storage device comprises a well cover and a shaft with the lower end arranged in a sealing cover manner, the shaft is used for being arranged in a drilled hole, heat conduction liquid is filled in the shaft, the wall of the shaft is in heat conduction connection with surrounding rocks so that the heat conduction liquid and the surrounding rocks perform heat exchange, and the well cover covers the upper end of the shaft;
the heat exchange device comprises a buried pipe, and the buried pipe is arranged in the shaft so as to enable water in the buried pipe to exchange heat with the heat-conducting liquid; and the number of the first and second groups,
the heat transfer device comprises a second water inlet pipe and a second water outlet pipe, one end of the second water inlet pipe is connected with the water inlet end of the buried pipe, one end of the second water outlet pipe is connected with the water outlet end of the buried pipe, and the other ends of the second water inlet pipe and the second water outlet pipe are used for being connected with a heat pump system.
Further, the heat-conducting liquid is water.
Furthermore, a first through hole and a second through hole are arranged in the well lid in a penetrating manner;
the buried pipe comprises a spiral pipeline and a connecting pipeline, the spiral pipeline extends upwards and downwards to form a water inlet lower end and a water outlet upper end, the connecting pipeline comprises a first water inlet pipe and a first water outlet pipe, one end of the first water inlet pipe is connected with the second water inlet pipe, the other end of the first water inlet pipe penetrates through the first through hole, the water inlet lower end is connected with the second water outlet pipe, one end of the first water outlet pipe is connected with the second water outlet pipe, and the other end of the first water inlet pipe penetrates through the second through hole and the water outlet upper end.
Furthermore, a first temperature monitoring device is arranged on the second water inlet pipe and used for monitoring the temperature of the water in the second water inlet pipe; and/or a second temperature monitoring device is arranged on the second water outlet pipe and used for monitoring the temperature of the water in the second water outlet pipe.
Further, the well lid runs through and is equipped with the perforation, well formula spiral ground heat exchanger still includes the supply pipeline, supply pipeline one end is passed the perforation is located in the pit shaft, the other end is located outside the pit shaft for be connected with the outer replenishing device of pit shaft, to supply heat-conducting liquid in the pit shaft.
The water level meter is arranged in the shaft and used for recording the water level height of the heat-conducting liquid in the shaft.
Further, the water well type spiral ground heat exchanger further comprises a third temperature monitoring device, and the third temperature monitoring device is used for monitoring the temperature of the heat conducting liquid in the shaft.
The embodiment of the utility model also provides a heat exchange system, which comprises a heat exchanger inside the building, a heat pump system and the water well type spiral ground heat exchanger, wherein the water well type spiral ground heat exchanger is arranged in the drill hole; and the other ends of the second water inlet pipe and the second water outlet pipe in the water well type spiral ground heat exchanger are connected with one end of the heat pump system, and the other end of the heat pump system is connected with the heat exchanger inside the building.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: through being provided with the pit shaft, pack heat conduction liquid between buried pipe and country rock, can enlarge the area of heat exchange, regard heat conduction liquid as the transition medium of heat exchange, can store energy effectively, improve the efficiency of heat transfer.
Drawings
FIG. 1 is a schematic structural view of a water well type spiral ground heat exchanger provided by the present invention;
in the figure: the water level monitoring device comprises a well cover 1, a well cover 11, a first through hole, a second through hole 12, a perforation 13, a shaft 2, a buried pipe 3, a spiral pipeline 31, a connecting pipeline 32, a first water inlet pipe 321, a first water outlet pipe 322, a second water inlet pipe 4, a water inlet valve 41, a first temperature monitoring device 42, a second water outlet pipe 5, a water outlet valve 51, a second temperature monitoring device 52, a supply pipeline 6, a supply pipeline 61, a water level meter 7 and a third temperature monitoring device 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
The embodiment of the utility model provides a heat exchange system, which comprises a heat exchanger inside a building, a heat pump system and a water well type spiral ground heat exchanger, wherein the water well type spiral ground heat exchanger is arranged in a drill hole; the water well type spiral ground heat exchanger is connected with one end of the heat pump system, and the other end of the heat pump system is connected with the heat exchanger inside the building. Wherein, the utility model discloses a point lies in well formula spiral ground heat exchanger, and the following concrete explanation is done to well formula spiral ground heat exchanger.
Referring to fig. 1, an embodiment of the present invention provides a water well type spiral ground heat exchanger, which includes a heat storage device, a heat exchange device and a heat transfer device.
The heat storage device comprises a well cover 1 and a shaft 2 with the lower end being arranged in a sealing cover mode, the shaft 2 is arranged in a drilled hole, heat conduction liquid is filled in the shaft 2, and the wall of the shaft 2 is in heat conduction with surrounding rocks so that the heat conduction liquid and the surrounding rocks can exchange heat; in the embodiment, the depth of the shaft 2 is 30-50m, the diameter is 0.8-1.5m, the heat-conducting liquid is water or other liquid with larger heat capacity, the diameter of the shaft 2 is larger, so that the contact area between the surrounding rock and the water in the shaft 2 is larger, the heat exchange rate between the surrounding rock and the water can be improved, and the heat loss can be better avoided. The well lid 1 covers in 2 upper ends of pit shaft can avoid receiving the pollution in the pit shaft 2, well lid 1 passes through and is equipped with first through-hole 11, second through-hole 12 and perforation 13.
The heat exchange device comprises a buried pipe 3, and the buried pipe 3 is arranged in the shaft 2 so as to enable the water in the buried pipe 3 to exchange heat with the heat-conducting liquid, in this embodiment, the water in the buried pipe 3 exchanges heat with the water in the shaft 2. The buried pipe 3 comprises a spiral pipe 31 and a connecting pipe 32, the spiral pipe 31 extends in the up-down direction and is provided with a water inlet lower end and a water outlet upper end, in the embodiment, the spiral pipe 31 is a copper pipe, the pipe diameter is 32-50mm, the effective contact area of the buried pipe 3 and the water in the shaft 2 is increased, the heat exchange between the water in the spiral pipe 31 and the water in the shaft 2 can be fully realized, the working performance of the heat pump is greatly improved, and the drilling depth can be reduced. The connecting pipe 32 includes a first water inlet pipe 321 and a first water outlet pipe 322, in this embodiment, the first water inlet pipe 321 and the first water outlet pipe 322 are copper pipes, the pipe diameter is 32-50mm, and the copper pipes are used for conveying the surface fluid into the spiral pipe 31, and the heat conductivity of the copper pipes is higher than that of a common plastic pipe, so that the heat exchange efficiency can be improved. In this embodiment, the first water inlet pipe 321 and the first water outlet pipe 322 are straight pipes and extend along the vertical direction, the lower end of the first water inlet pipe 321 is connected to the lower end of the inlet water, the upper end of the first water inlet pipe passes through the first through hole 11 and is located outside the shaft 2, the lower end of the first water outlet pipe 322 is connected to the upper end of the outlet water, and the upper end of the first water outlet pipe passes through the second through hole 12 and is located outside the shaft 2.
The heat transfer device comprises a second water inlet pipe 4 and a second water outlet pipe 5, wherein one end of the second water inlet pipe 4 is connected with the water inlet end of the buried pipe 3, in this embodiment, the second water inlet pipe is connected with the upper end of the first water inlet pipe 321, one end of the second water outlet pipe 5 is connected with the water outlet end of the buried pipe 3, in this embodiment, the second water inlet pipe is connected with the upper end of the first water outlet pipe 322, and the other ends of the second water inlet pipe 4 and the second water outlet pipe 5 are connected with the heat pump system, in this embodiment, the second water inlet pipe 4 and the second water outlet pipe 5 are respectively provided with a water inlet valve 41 and a water outlet valve 51 so as to control the flow of water in the second water inlet pipe 4 and. A first temperature monitoring device 42 is arranged on the second water inlet pipe 4, and the first temperature monitoring device 42 is used for monitoring the temperature of the water in the second water inlet pipe 4; and a second temperature monitoring device 52 is arranged on the second water outlet pipe 5, and the second temperature monitoring device 52 is used for monitoring the temperature of the water in the second water outlet pipe 5. In this embodiment, the first temperature monitoring device 42 and the second temperature monitoring device 52 are both temperature sensors and thermometers.
The water well type spiral ground heat exchanger further comprises a supply pipeline 6, one end of the supply pipeline 6 penetrates through the through hole 13 and is arranged in the shaft 2, the other end of the supply pipeline is arranged outside the shaft 2 and is used for being connected with a supply device outside the shaft 2 and supplying heat-conducting liquid into the shaft 2, and in the embodiment, the supply device supplies water into the shaft 2. And a supply pipeline valve 61 is arranged on the supply pipeline 6 and used for controlling the flow of water in the supply pipeline 6. The water well type spiral ground heat exchanger further comprises a water level gauge 7, wherein the water level gauge 7 is arranged in the shaft 2 and used for recording the water level height of heat conducting liquid in the shaft 2. In this embodiment, adopt electronic monitoring technique, utilize fluviograph 7 to acquire 2 interior water level heights of pit shaft in real time, when the water level reduces to the minimum scale mark of design in the well, supply pipe valve 61 is automatic to be opened, through supply pipe 6 to 2 interior water injections of pit shaft for the water level reaches the required water level height of engineering in the well, supply pipe valve 61 self-closing is prior art to supply pipe valve 61's automatic monitoring technique, does not do the concrete description here.
Well formula spiral ground heat exchanger still includes third temperature monitoring devices 8, and in this embodiment, third temperature monitoring devices 8 are temperature sensor and thermometer, and the lower extreme is located in pit shaft 2, the upper end is passed well lid 1 and is fixed in 1 top of well lid, third temperature monitoring devices 8 are used for the monitoring the temperature of 2 interior waters of pit shaft.
When the device is used, the supply pipeline valve 61 is opened, water is injected into the shaft 2 through the supply pipeline 6, so that the water level in the shaft 2 reaches the water level height required by the engineering, and the supply pipeline valve 61 is automatically closed after the water level reaches the corresponding height; heat exchange is carried out between the water in the shaft 2 and the surrounding rocks, and a third temperature monitoring device 8 in the shaft 2 records the temperature of the water in the shaft 2 until the temperature reaches the actually required temperature; opening the water inlet valve 41 and the water outlet valve 51 to enable water in the buried pipe 3 to flow from the second water inlet pipe 4, the buried pipe 3 and the second water outlet pipe 5 to the heat pump system, transferring heat of the water in the buried pipe 3 to the heat exchanger in the building through the heat pump system, enabling low-temperature water to flow back to the buried pipe 3 through the second water inlet pipe 4 again, and enabling the water in the buried pipe 3 to exchange heat with surrounding rocks, so that shallow geothermal energy can be continuously transferred to the heat exchanger in the building; when the water of the buried pipe 3 passes through the second water inlet pipe 4, the temperature in the second water inlet pipe 4 is recorded through the first temperature monitoring device 42, when the water of the buried pipe 3 enters the second water outlet pipe 5, the temperature in the second water outlet pipe 5 is recorded through the second temperature monitoring device 52, when the water level in the shaft 2 is reduced to the preset lowest water level, the supply pipeline valve 61 is opened, the water is supplied into the shaft 2 until the water level reaches the preset water level, and the supply pipeline valve 61 is closed.
The utility model is provided with the shaft 2, water is filled between the buried pipe 3 and the surrounding rock, the heat exchange area can be enlarged, and the water has larger heat capacity, and the water is used as a transition medium for exchanging heat, thereby effectively storing energy and improving the heat exchange efficiency; due to the universality and economy of water, in regions with abundant groundwater, shallow geothermal energy in the region can be effectively utilized by utilizing water resources for heat transfer.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A water well type spiral ground heat exchanger, comprising:
the heat storage device comprises a well cover and a shaft with the lower end arranged in a sealing cover manner, the shaft is used for being arranged in a drilled hole, heat conduction liquid is filled in the shaft, the wall of the shaft is in heat conduction connection with surrounding rocks so that the heat conduction liquid and the surrounding rocks perform heat exchange, and the well cover covers the upper end of the shaft;
the heat exchange device comprises a buried pipe, and the buried pipe is arranged in the shaft so as to enable water in the buried pipe to exchange heat with the heat-conducting liquid; and the number of the first and second groups,
the heat transfer device comprises a second water inlet pipe and a second water outlet pipe, one end of the second water inlet pipe is connected with the water inlet end of the buried pipe, one end of the second water outlet pipe is connected with the water outlet end of the buried pipe, and the other ends of the second water inlet pipe and the second water outlet pipe are used for being connected with a heat pump system.
2. A well-type spiral ground heat exchanger as claimed in claim 1, wherein said heat transfer liquid is water.
3. A well-type spiral ground pipe heat exchanger as claimed in claim 1, wherein the well lid is provided with a first through hole and a second through hole therethrough;
the buried pipe comprises a spiral pipeline and a connecting pipeline, the spiral pipeline extends upwards and downwards to form a water inlet lower end and a water outlet upper end, the connecting pipeline comprises a first water inlet pipe and a first water outlet pipe, one end of the first water inlet pipe is connected with the second water inlet pipe, the other end of the first water inlet pipe penetrates through the first through hole, the water inlet lower end is connected with the second water outlet pipe, one end of the first water outlet pipe is connected with the second water outlet pipe, and the other end of the first water inlet pipe penetrates through the second through hole and the water outlet upper end.
4. A well-type spiral ground heat exchanger as claimed in claim 1, wherein a first temperature monitoring device is provided on the second water inlet pipe for monitoring the temperature of water in the second water inlet pipe; and/or a second temperature monitoring device is arranged on the second water outlet pipe and used for monitoring the temperature of the water in the second water outlet pipe.
5. The water well type spiral ground pipe heat exchanger of claim 1, wherein the well lid is perforated with a perforation, and the water well type spiral ground pipe heat exchanger further comprises a supply pipe, one end of the supply pipe passes through the perforation and is arranged in the well shaft, and the other end of the supply pipe is arranged outside the well shaft and is connected with a supply device outside the well shaft for supplying heat-conducting liquid into the well shaft.
6. A well-type spiral ground heat exchanger as claimed in claim 1, further comprising a water level gauge disposed in said well bore for recording the water level of the heat conductive liquid in said well bore.
7. A water well spiral ground heat exchanger as claimed in claim 1, further comprising a third temperature monitoring device for monitoring the temperature of the heat transfer liquid in the wellbore.
8. A heat exchange system, comprising a building internal heat exchanger, a heat pump system and a water well type spiral ground heat exchanger according to any one of claims 1 to 7, wherein the water well type spiral ground heat exchanger is arranged in a drill hole; and the other ends of the second water inlet pipe and the second water outlet pipe in the water well type spiral ground heat exchanger are connected with one end of the heat pump system, and the other end of the heat pump system is connected with the heat exchanger inside the building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920768106.4U CN210441697U (en) | 2019-05-24 | 2019-05-24 | Water well type spiral ground heat exchanger and heat exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920768106.4U CN210441697U (en) | 2019-05-24 | 2019-05-24 | Water well type spiral ground heat exchanger and heat exchange system |
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| Publication Number | Publication Date |
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| CN210441697U true CN210441697U (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920768106.4U Expired - Fee Related CN210441697U (en) | 2019-05-24 | 2019-05-24 | Water well type spiral ground heat exchanger and heat exchange system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345782A (en) * | 2019-05-24 | 2019-10-18 | 中国地质大学（武汉） | A kind of well-type spiral ground heat exchanger and heat-exchange system |
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2019
- 2019-05-24 CN CN201920768106.4U patent/CN210441697U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345782A (en) * | 2019-05-24 | 2019-10-18 | 中国地质大学（武汉） | A kind of well-type spiral ground heat exchanger and heat-exchange system |
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