CN117213081A - Shallow geothermal energy utilization system - Google Patents
Shallow geothermal energy utilization system Download PDFInfo
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- CN117213081A CN117213081A CN202311455703.9A CN202311455703A CN117213081A CN 117213081 A CN117213081 A CN 117213081A CN 202311455703 A CN202311455703 A CN 202311455703A CN 117213081 A CN117213081 A CN 117213081A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000003673 groundwater Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The patent application discloses a shallow geothermal energy utilization system, which comprises a plurality of heat exchangers, heat pump units and a temperature regulator, wherein the heat exchangers, the heat pump units and the temperature regulator are buried in different strata, two ends of each heat exchanger are respectively connected with a first pipeline and a second pipeline, and a flow dividing valve is arranged on each second pipeline; the temperature regulator comprises an inner flow pipe, an outer flow pipe and a temperature regulating pipe, the second pipeline is communicated with the inner flow pipe or the outer flow pipe through a flow dividing valve, the temperature regulating pipe comprises an inner pipe and an outer pipe surrounding the inner pipe, the inner flow pipe is communicated with the inner pipe, the outer pipe is communicated with the outer pipe, the inner pipe is made of a material with high heat conductivity, the outer pipe is made of a heat insulating material, and heat can be transferred through the wall of the inner pipe; according to the application, the water temperature is regulated and controlled through the inner pipe and the outer pipe, so that the output water temperature is basically consistent with the temperature required by a user, the output hot water can directly heat the user, and the water temperature is regulated without an additional regulation or control system, so that the cost is lower.
Description
The application relates to the technical field of shallow geothermal energy utilization, in particular to a shallow geothermal energy utilization system.
Background
The shallow geothermal energy is an intangible natural resource accumulated underground (0-200 m), and has the characteristics of recycling, cleanness, environmental protection, wide distribution, huge reserves, shallow burial, near development and utilization and the like. At present, shallow ground temperature can be applied to cities, ground water can be regulated and controlled in temperature through underground temperature, for example, ground water is injected into a heat exchange system buried underground through a water pump in winter to heat the water, and the heated water is conveyed back to the ground to heat.
Because stratum temperature can increase along with the increase of degree of depth, the heat exchange system of different degree of depth is different with the heat exchange degree of stratum, just leads to the temperature difference of output, consequently, in order to satisfy user's water demand, under the general circumstances, need to carry out the regulation to the temperature earlier after, carry the user again, because governing system has equipment cost, still need periodic maintenance in the later stage, it is with high costs.
Disclosure of Invention
The application aims to provide a shallow geothermal energy utilization system, which can directly heat the outputted hot water for a user without additionally arranging an adjusting or controlling system to adjust the water temperature, and has lower cost.
The technical scheme adopted by the application is as follows:
the shallow geothermal energy utilization system comprises a plurality of heat exchangers, heat pump units and a temperature regulator, wherein the heat exchangers, the heat pump units and the temperature regulator are buried in different strata, two ends of each heat exchanger are respectively connected with a first pipeline and a second pipeline, and a diverter valve is arranged on each second pipeline; the temperature regulator comprises an inner flow pipe, an outer flow pipe and a temperature regulating pipe, the second pipeline is respectively communicated with the inner flow pipe or the outer flow pipe through a flow dividing valve, the temperature regulating pipe comprises an inner pipe and an outer pipe surrounding the inner pipe, the inner flow pipe is communicated with the inner pipe, the outer pipe is communicated with the outer pipe, the inner pipe is made of high heat conduction materials, the outer pipe is made of heat insulation materials, and heat can be transferred through the wall of the inner pipe; the heat pump unit comprises a heat pump water inlet and a heat pump water outlet, the heat pump water inlet is connected with a water inlet pipe, a plurality of first pipelines are all communicated with the water inlet pipe, the heat pump water outlet is connected with a water outlet pipe, and the temperature regulating pipe is communicated with the water outlet pipe.
Compared with the prior art, the application has the beneficial effects that:
1. the principle of this scheme is that carry out the heat transfer of high temperature to low temperature with the water of different temperatures in inner tube and the outer tube through the inner tube wall, according to the law of conservation of heat, total heat in inner tube and the outer tube is unchangeable, when reaching the equilibrium, the temperature of the water in inner tube and the outer tube is the same basically, at this moment, the temperature in inner tube and the outer tube reaches unanimously basically with the temperature that the user required, can directly carry for the user in order to heat, set up like this, can not need to set up temperature regulation or control system in addition and adjust the temperature, not only design simplification, but also can reduce cost.
2. Because the water is through the inevitable heat loss that has in the pipeline transportation process, the inner tube has surrounded the outer tube outward in this scheme, and the outer tube except can with the inner tube mutually regulated temperature, can also play the heat retaining effect to the temperature of inner tube, prevents the heat loss of inner tube, and this scheme is by two equal heat loss that take place of pipe originally become the heat loss of a pipe, can reduce heat loss greatly, improves thermal utilization ratio.
As a preferred embodiment of the application, the two ends of the inner tube are provided with inner tube flanges, the outer sides of the two ends of the outer tube are provided with outer tube flanges, a plurality of support connecting rods are also fixed on the inner side wall of one end of the outer tube along the circumferential direction, the free ends of the four support connecting rods are fixedly provided with support rings, the support rings are aligned with the inner tube coaxially, and the lower end face of the inner tube flange is propped against the upper end face of the support rings; in the scheme, the supporting ring can play a role in supporting the inner pipe, and the arrangement can avoid the inner pipe from shaking in the outer pipe due to overlong pipeline because the pipeline is generally longer, so that the stability of the inner pipe is ensured; meanwhile, the prefabricated pipe can be coordinated and controlled according to actual needs during installation, and the on-site installation quantity is reduced, so that the installation efficiency is improved.
As a preferred embodiment of the application, the heat exchanger is U-shaped, and turbulators are arranged at the corners of the heat exchanger; in this scheme turbulator setting is in the corner of heat exchanger, owing to the unavoidable impurity of overground aquatic, water is in the in-process of heating through the heat exchanger, and the corner of heat exchanger is easy impurity deposit, and in the past, impurity is piled up too much, will influence the heat transfer effect of heat exchanger, sets up the turbulator here, can pass through the turbulator with mild rivers on the one hand and disturb, reduces impurity deposit, prevents the pipeline jam, on the other hand can assist the improvement velocity of flow, reduces heat pump set's working strength, and is more energy-conserving.
As a preferred embodiment of the application, an insulating layer is arranged on the outer side of the outer tube; the heat preservation in this scheme can reduce the heat loss of outer tube, further improves thermal utilization ratio.
The control module is connected with the plurality of flow dividing valves and the plurality of temperature sensors respectively, the control module is also connected with the input module, the input module is used for inputting temperature parameters required by a user, the plurality of temperature sensors are used for respectively detecting water temperatures in the corresponding second pipelines, the control module calculates the average value of the temperature values of the inner pipe and the outer pipe according to the input temperature parameters, and then the average value of two temperature values is selected to be equal to the average value of the two temperatures of the inner pipe and the outer pipe according to the temperatures measured by the plurality of temperature sensors, and the opening and closing of the two flow dividing valves corresponding to the two temperature values are controlled; through setting up input module, control module and temperature sensor in this scheme, can realize that temperature regulation is automatic for temperature regulation is more accurate, and user experience feels better.
Drawings
FIG. 1 is a schematic diagram of a shallow geothermal energy utilization system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the structure of the junction of the temperature-adjusting pipe in the shallow geothermal energy utilization system according to the embodiment of the present application;
FIG. 3 is a schematic view of the structure of the end tube of the temperature-adjusting tube in the shallow geothermal energy utilization system according to the embodiment of the application;
fig. 4 is a schematic structural diagram of a head pipe of a temperature adjusting pipe in the shallow geothermal energy utilization system according to an embodiment of the present application.
The reference numerals include:
a heat exchanger 1, a first pipe 2, a second pipe 3, and a diverter valve 4;
a temperature-adjusting pipe 5, an inner pipe 51, an inner pipe flange 511, an inner pipe water outlet 512, and an inner pipe water inlet 513;
outer tube 52, outer tube flange 521, support link 522, support ring 523, outer tube water outlet 524, and outer tube water inlet 525;
insulation 53, elbow 54;
an inner flow pipe 6, an outer flow pipe 7, turbulators 8, a water outlet pipe 9, a user side 10, a heat pump unit 11 and a water inlet pipe 12.
Detailed Description
Exemplary embodiments that embody features and advantages of the present application will be set forth in detail in the following description. It will be understood that the application is capable of various modifications in various embodiments, all without departing from the scope of the application, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the application.
In the description of the present application, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the structure referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application.
Referring to fig. 1, this embodiment discloses a shallow geothermal energy utilization system, which includes a plurality of heat exchangers 1, a heat pump unit 11, a temperature regulator and a tail water treatment device 11, wherein the plurality of heat exchangers 1 and the temperature regulator are all buried in a stratum, the temperature regulator is used for regulating and controlling the water temperature of output, the heat exchangers 1 are used for heating ground water input into the ground, wherein the temperature regulator is buried in a depth of 5-15 meters from the ground, the plurality of heat exchangers 1 are buried in a depth of 60-150 meters continuing to be downward from the temperature regulator, the plurality of heat exchangers 1 are buried in stratum with different depths according to preset depths, the depth difference between every two heat exchangers 1 in the scheme is 30 meters, the number of the heat exchangers 1 is four, the four heat exchangers 1 are all U-shaped, two ends of the U-shaped heat exchangers 1 are respectively connected with a first pipeline 2 and a second pipeline 3, the ground water enters the ground through the first pipeline 2, and then flows out through the second pipeline 3 after the heat exchangers 1 heat the water, and the heat exchanger 1 works in a structure which is not more than the prior art;
referring to FIG. 2, the thermostat comprises an inner flow pipe 6, an outer flow pipe 7 and a temperature regulating pipe 5, wherein a flow dividing valve 4 is arranged on a second pipeline 3, the second pipeline 3 is communicated with the inner flow pipe 6 or the outer flow pipe 7 through the flow dividing valve 4, the temperature regulating pipe 5 is formed by connecting a plurality of sections of prefabricated pipes, the temperature regulating pipe 5 is a double-layer pipe, the double-layer pipe comprises an inner pipe 51 and an outer pipe 52 surrounding the inner pipe 51, the section flow and the flow velocity of the inner pipe 51 and the outer pipe 52 are the same, inner pipe flanges 511 are integrally formed at two ends of the inner pipe 51, when the two sections of the inner pipe 51 are connected, the two inner pipe flanges 511 are fixedly connected through bolts after being aligned, rubber gaskets are filled between the two inner pipe flanges 511 to ensure the tightness, the outer sides of two ends of the outer tube 52 are integrally provided with outer tube flanges 521, the two sections of the outer tube 52 are fixedly connected through bolts after the two outer tube flanges 521 are aligned, rubber gaskets are also filled between the two outer tube flanges 521 to ensure tightness, four support connecting rods 522 are also integrally formed on the inner side wall of one end of the outer tube 52 along the circumferential direction, the free ends of the four support connecting rods 522 are fixedly provided with support rings 523, the support rings 523 are aligned with the inner tubes coaxially, and after the two sections of the inner tubes 51 are connected, the lower end faces of the inner tube flanges 511 are abutted against the upper end faces of the support rings 523, so that the arrangement can avoid shaking of the inner tubes 51 in the outer tube 52 due to overlong pipelines and improve the stability;
referring to fig. 3 and 4, the end pipes of the inner pipe 51 and the outer pipe 52 are respectively provided with an inner pipe water outlet 512 and an outer pipe water outlet 524, an elbow pipe 54 is connected between the inner pipe water outlet 512 and the outer pipe water outlet 524, the elbow pipe 54 is communicated with the inner pipe water outlet 512 and the outer pipe water outlet 524, and an electric gate valve is arranged in the elbow pipe 54.
The head end pipes of the inner pipe 51 and the outer pipe 52 are respectively provided with an inner pipe water inlet 513 and an outer pipe water inlet 525, the inner pipe 6 is communicated with the inner pipe water inlet 513, the outer pipe 7 is communicated with the outer pipe water inlet 525, the inner pipe 51 is made of high heat conduction materials, and the outer pipe 52 is made of heat insulation materials; when the water heater is used, the water flowing into the inner pipe 51 and the outer pipe 52 is water flowing through two formations with different depths through the flow dividing valve 4, at the moment, the temperatures of the water in the inner pipe 51 and the water in the outer pipe 52 are different, the two forms a temperature difference, and then the heat transfer from high temperature to low temperature is caused, according to the law of conservation of heat, the total heat in the inner pipe 51 and the total heat in the outer pipe 52 are unchanged, when the water temperature in the inner pipe 51 and the water temperature in the outer pipe 52 are basically the same when the water temperature in the inner pipe 51 and the water temperature in the outer pipe 52 reach equilibrium, at the moment, the water temperature in the inner pipe 51 and the water temperature in the outer pipe 52 are basically consistent with the temperature required by a user 10, the water heater can be directly conveyed to the user for heating, and the inner pipe 51 adopts a high heat conducting material, the heat conducting speed is high, the heat conducting effect is good, rapid temperature adjustment can be realized, after the scheme is set, the water temperature is not specially adjusted by another temperature adjusting or controlling system, the design is simplified, and the cost is reduced.
Because the in-process that the water after heating was returning through the pipeline, the overlength of journey inevitably has the heat to run off, the double-layer pipe that sets up in this scheme, the outer tube 52 of double-layer pipe except can with the mutual temperature regulation of inner tube 51, can also play the heat retaining effect to the water of inner tube 51, prevent the heat loss of inner tube 51, make the heat loss that all takes place of two original pipes change into the heat loss of a pipe, can reduce heat loss greatly, improve thermal utilization ratio. The heat preservation 53 is still installed in the outside of outer tube 52, and the heat preservation 53 can adopt the foam, and the heat preservation 53 in this scheme can reduce the heat loss of outer tube 52, further improves the heat utilization ratio.
The heat pump unit 11 is used for providing conveying power for ground water input underground and conveying hot water to the user side 10, the heat pump unit 11 comprises a heat pump water inlet and a heat pump water outlet, the structure and the working principle of the heat pump unit are the prior art, and the structure and the working principle are not repeated here, the heat pump water inlet is connected with a water inlet pipe 12, a plurality of first pipelines 2 are all communicated with the water inlet pipe 12, the heat pump water outlet is connected with a water outlet pipe 9 and the water outlet pipe 9 is communicated with the user side 10.
Turbulator 8 is installed to the corner of heat exchanger 1, the structure and the theory of operation of turbulator 8 are prior art in this scheme, do not do too much in this and give birth to, because the aquatic is difficult to avoid having impurity on the ground, the water is in the in-process through U type heat exchanger 1 heating, the corner of heat exchanger 1 deposits impurity easily, long ago, impurity piles up too much, will influence the heat transfer effect of heat exchanger 1, through setting up turbulator 8 in the corner, on the one hand can pass through turbulator 8 with gentle rivers and disturb, reduce the deposit of aquatic impurity, prevent the pipeline jam, on the other hand turbulator 8 can assist the improvement velocity of flow, can use the less heat pump set 11 of power, it is more energy-conserving.
The embodiment further includes a control module, an input module and four temperature sensors, the four temperature sensors are respectively installed in the four second pipelines 3, the control module is respectively connected with the four diverter valves 4 and the four temperature sensors, the control module is further connected with the input module, the input module is used for inputting temperature parameters required by the user end 10, the four temperature sensors are respectively used for detecting water temperatures in the corresponding second pipelines 3, the control module calculates average values of two temperatures of the inner pipe 51 and the outer pipe 52 according to the input temperature parameters, and then according to the four temperatures measured by the four temperature sensors, two temperatures are selected to be equal to the average values of the two temperatures of the inner pipe 51 and the outer pipe 52, and the two diverter valves 4 corresponding to the two temperature values are controlled to open and close, for example: the temperature parameter input in the input module is 20 ℃, the temperature measured by the four temperature sensors is 15 ℃, 25 ℃, 35 ℃ and 45 ℃, the control module calculates that the sum of the temperature values of the inner tube 51 and the outer tube 52 is 40 ℃ according to the input temperature parameter, and as the sum of the 15 ℃ and the 25 ℃ is 40 ℃, the two flow dividing valves 4 corresponding to the 15 ℃ and the 25 ℃ are further selected to be opened, one of the two flow dividing valves 4 is communicated with the inner tube 6 and finally enters the inner tube 51, the other one of the two flow dividing valves 4 is communicated with the outer tube 7 and finally enters the outer tube 52, a temperature difference is formed between the inner tube 51 and the outer tube 52, heat transfer is caused, after balance is achieved, the temperature between the inner tube 51 and the outer tube 52 is 20 ℃, the user side 10 can heat, and through the arrangement of the input module, the control module and the temperature sensors, the temperature regulation and automation can be realized, so that the temperature regulation is more accurate, and the user experience is better.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application as claimed.
Claims (5)
1. A shallow geothermal energy utilization system is characterized in that: the heat pump system comprises a plurality of heat exchangers, heat pump units and a temperature regulator, wherein the heat exchangers, the heat pump units and the temperature regulator are buried in different strata, two ends of each heat exchanger are respectively connected with a first pipeline and a second pipeline, and a flow dividing valve is arranged on each second pipeline; the temperature regulator comprises an inner flow pipe, an outer flow pipe and a temperature regulating pipe, the second pipeline is respectively communicated with the inner flow pipe or the outer flow pipe through a flow dividing valve, the temperature regulating pipe comprises an inner pipe and an outer pipe surrounding the inner pipe, the inner flow pipe is communicated with the inner pipe, the outer pipe is communicated with the outer pipe, the inner pipe is made of high heat conduction materials, the outer pipe is made of heat insulation materials, and heat can be transferred through the wall of the inner pipe; the heat pump unit comprises a heat pump water inlet and a heat pump water outlet, the heat pump water inlet is connected with a water inlet pipe, a plurality of first pipelines are all communicated with the water inlet pipe, the heat pump water outlet is connected with a water outlet pipe, and the temperature regulating pipe is communicated with the water outlet pipe.
2. The shallow geothermal energy utilization system of claim 1, wherein: the inner pipe is characterized in that inner pipe flanges are arranged at two ends of the inner pipe, outer pipe flanges are arranged at the outer sides of two ends of the outer pipe, a plurality of support connecting rods are further fixed on the inner side wall of one end of the outer pipe along the circumferential direction, support rings are fixed at the free ends of the four support connecting rods, the support rings are aligned with the inner pipe in a concentric mode, and the lower end face of each inner pipe flange abuts against the upper end face of each support ring.
3. The shallow geothermal energy utilization system according to claim 2, wherein: the heat exchanger is U-shaped, and turbulators are arranged at the corners of the heat exchanger.
4. A shallow geothermal energy utilization system according to claim 3, wherein: and an insulating layer is arranged on the outer side of the outer tube.
5. The shallow geothermal energy utilization system of claim 1, wherein: the control module is connected with the plurality of flow dividing valves and the plurality of temperature sensors respectively, the control module is further connected with the input module, the input module is used for inputting temperature parameters required by a user, the plurality of temperature sensors are used for detecting water temperatures in the corresponding second pipelines respectively, the control module calculates the average value of the temperature values of the inner tube and the outer tube according to the input temperature parameters, and then the average value of the two temperature values is equal to the average value of the two temperatures of the inner tube and the outer tube according to the temperatures measured by the plurality of temperature sensors, and the opening and closing of the two flow dividing valves corresponding to the two temperature values are controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311455703.9A CN117213081A (en) | 2023-11-03 | 2023-11-03 | Shallow geothermal energy utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311455703.9A CN117213081A (en) | 2023-11-03 | 2023-11-03 | Shallow geothermal energy utilization system |
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| Publication Number | Publication Date |
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| CN117213081A true CN117213081A (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311455703.9A Pending CN117213081A (en) | 2023-11-03 | 2023-11-03 | Shallow geothermal energy utilization system |
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- 2023-11-03 CN CN202311455703.9A patent/CN117213081A/en active Pending
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