CN210862312U - Assembled buried pipe ground source heat pump system - Google Patents
Assembled buried pipe ground source heat pump system Download PDFInfo
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- CN210862312U CN210862312U CN201922025297.8U CN201922025297U CN210862312U CN 210862312 U CN210862312 U CN 210862312U CN 201922025297 U CN201922025297 U CN 201922025297U CN 210862312 U CN210862312 U CN 210862312U
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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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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses an assembled buried pipe ground source heat pump system, including buried pipe system, heat pump set and air conditioner end system, buried pipe system is established ties by a plurality of heat transfer modules and is constituteed, and each heat transfer module includes buried pipe and holds the thermal unit that releases, holds the thermal unit for the rectangle box of horizontal placement to it has phase change material to fill in the box; the buried pipe is arranged in the box body and is wrapped by the phase-change material, and two ends of the buried pipe penetrate through two corresponding surfaces of the box body, so that an inlet and an outlet of the buried pipe are formed; the inlet and the outlet of the buried pipe of the heat exchange module positioned in the middle are respectively connected with the outlet and the inlet of the buried pipe of the two adjacent heat exchange modules, and the inlet and the outlet of the buried pipe of the heat exchange module positioned at the two ends are respectively connected with the liquid outlet of the liquid outlet pipeline and the liquid inlet of the liquid inlet pipeline of the heat pump unit. The system has high heat exchange efficiency, large heat exchange area of the buried pipe and simple and quick assembly.
Description
Technical Field
The utility model belongs to the technical field of renewable energy's utilization and the intensive heat transfer of buried pipe system, in particular to assembled buried pipe ground source heat pump system.
Background
The modern buildings are the head of energy consumption, and the energy consumption of the building industry accounts for about 40 percent of the total national energy consumption. And about 50% of building energy consumption is used for heating, ventilating and air conditioning systems.
Energy conservation and environmental protection have been two major topics of the modern construction industry from a global perspective. With the continuous reduction of fossil energy on earth, the development and utilization of new energy becomes the focus of world attention. The shallow geothermal energy is a renewable novel environment-friendly energy source and mainly comes from solar radiation and earth gradient temperature rise. The underground rock soil has better heat storage performance, and the heat is stored underground while refrigerating in summer by using the cold energy stored in winter through the buried pipe heat exchanger; the heat stored in summer is used for heating in winter, and meanwhile, the cold is stored underground. Therefore, a system (i.e., a ground source heat pump system) for regulating and controlling the indoor hot and humid environment of a building by utilizing the shallow geothermal energy needs to be designed, so that the cold and heat in winter and summer can be supplied together.
The ground source heat pump system is a closed-loop circulating ground source heat pump system which utilizes heat in underground rock and soil. The circulating liquid (water or antifreeze liquid with water as a main component) flows in the closed underground buried pipe to realize heat transfer between the system and the ground.
The existing ground source heat pump system has the problems of low actual heat exchange efficiency, small heat exchange area of the buried pipe and the like, and the problems are the bottleneck of the application and development of the key technology of the ground source heat pump system and limit the large-scale popularization and application of the ground source heat pump system.
Disclosure of Invention
The above-mentioned not enough to prior art exists, the utility model aims at providing an assembled buried pipe ground source heat pump system that heat exchange efficiency is high, buried pipe heat exchange area is great, and the assembly is simple, swift.
The technical scheme of the utility model is realized like this:
the assembled buried pipe ground source heat pump system comprises a buried pipe system, a heat pump unit and an air conditioner tail end system; the buried pipe system is formed by connecting a plurality of heat exchange modules in series, each heat exchange module comprises a buried pipe and a heat storage and release unit, the heat storage and release unit is a horizontally placed rectangular box body, and phase change materials are filled in the box body; the buried pipe is arranged in the box body and is wrapped by the phase-change material, and two ends of the buried pipe penetrate through two corresponding surfaces of the box body, so that an inlet and an outlet of the buried pipe are formed; the inlet and the outlet of the buried pipe of the heat exchange module positioned in the middle are respectively connected with the outlet and the inlet of the buried pipe of the two adjacent heat exchange modules, and the inlet and the outlet of the buried pipe of the heat exchange module positioned at the two ends are respectively connected with the liquid outlet of the liquid outlet pipeline and the liquid inlet of the liquid inlet pipeline of the heat pump unit.
Furthermore, the fluid flowing in the buried pipe is a nano fluid.
Furthermore, the buried pipe positioned in the heat storage and release unit is formed by alternately arranging spiral pipes and straight pipes in series.
Furthermore, a plurality of buried pipes are arranged in each heat storage and release unit, and the buried pipes are metal pipelines, so that the heat exchange efficiency of the heat storage and release units and the buried pipes is enhanced.
Furthermore, the inlet and the outlet of the buried pipe are provided with socket joints which are connected in a matching way, so that the heat exchange modules can be conveniently connected; meanwhile, socket joints which are matched and connected with the outlet and the inlet of the buried pipe are respectively arranged at the liquid inlet and the liquid outlet of the heat pump unit, so that the buried pipe is conveniently connected with the heat pump unit.
Further, the phase change material is paraffin.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses utilize the nano-fluid to replace traditional heat transfer fluid, compare with pure liquid, the nanoparticle of suspension is random motion (brown diffusion, thermal diffusion, subside and dispersion etc.) under the effect of the power such as frictional force between brown power, gravity, fluid and granule in the nano-fluid for fluid flow laminar flow bottom receives destruction, has strengthened fluidic disturbance, and flow turbulence intensity also strengthens thereupon, has reduced heat transfer thermal resistance, has strengthened the heat transfer. Meanwhile, the micro-motion of the nano-particles generates micro-convection between the particles and the liquid, and the micro-convection enhances the energy transfer process between the particles and the liquid. Because the interfacial area between the nano particles and the liquid is far larger than that of the millimeter or micron-sized particles under the condition of the same volume content of the particles, the heat conductivity coefficient of the liquid can be obviously increased by adding the nano particles into the liquid. Therefore, the nano fluid has an obvious enhancement effect on the heat exchange performance, the increase of the effective heat exchange area can be realized, and the heat exchange efficiency of the system is improved.
2. The utility model discloses with the structural feature of nano-fluid effect and heat transfer module reinforce heat transfer in coordination consider, the buried pipe is established ties by spiral pipe and straight tube and is constituted, and the spiral pipe has increased heat transfer area, buries intraductal nano-fluid and phase change material evenly, abundant heat transfer with being convenient for, and the straight tube has reduced nano-fluid and has buried intraductal flow resistance with ground, so adopts spiral pipe and straight tube to establish ties in turn in order to improve comprehensive heat exchange efficiency.
3. The utility model discloses use the melting point to be the paraffin about 22 ℃ as phase change material, paraffin is low temperature phase change material, and this low temperature phase change material has phase change latent heat height, does not have the supercooling and separates out the phenomenon, and it is very little that heat is inhaled many times after phase change temperature and the latent heat of phase change, and has advantages such as nontoxic, low price.
4. The utility model discloses heat exchange module adopts rectangle box structure, and the area of contact of its surface and soil is far greater than traditional horizontal buried pipe, has increased its section equivalent heat transfer area to heat exchange efficiency has been improved. Meanwhile, the phase-change material is sealed in the box body, so that the safety risk in the laying and backfilling of the traditional horizontal buried pipe is reduced.
5. The utility model discloses adopt socket joint to connect between the heat transfer module, simultaneously, heat transfer module can carry out standardized production in the workshop of mill, then when on-the-spot assembly, realizes the assembled installation of horizontal buried pipe and the extension of using the scale through socket joint to the assembly is simple, swift, thereby has improved assembly efficiency.
Drawings
Figure 1-the structure schematic diagram of the heat exchange module of the present invention.
Figure 2-the cross-sectional schematic view of the heat exchange module of the present invention.
Wherein: 1-buried pipe; 2-a spiral pipe; 3, straight pipe; 4-a phase change material; 5-a box body; 6-socket joint.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the assembled buried pipe ground source heat pump system comprises a buried pipe system, a heat pump unit and an air conditioner terminal system, wherein the buried pipe system is formed by connecting a plurality of heat exchange modules in series, each heat exchange module comprises a buried pipe 1 and a heat storage and release unit, the heat storage and release unit is a horizontally arranged rectangular box body 5, and a phase change material 4 is filled in the box body 5; the buried pipe 1 is arranged in the box body 5 and is wrapped by the phase change material 4, and two ends of the buried pipe 1 penetrate through two corresponding surfaces of the box body 5, so that an inlet and an outlet of the buried pipe are formed; the inlet and the outlet of the buried pipe of the heat exchange module positioned in the middle are respectively connected with the outlet and the inlet of the buried pipe of the two adjacent heat exchange modules, and the inlet and the outlet of the buried pipe of the heat exchange module positioned at the two ends are respectively connected with the liquid outlet of the liquid outlet pipeline and the liquid inlet of the liquid inlet pipeline of the heat pump unit.
The heat storage and release unit is of a rectangular box structure, the contact area of the outer surface of the heat storage and release unit and soil is far larger than that of a traditional horizontal buried pipe, the equivalent heat exchange area of the section of the heat storage and release unit is increased, and therefore the heat exchange efficiency is improved. Meanwhile, sealing components such as sealing rings, sealing strips and the like are arranged on two corresponding surfaces of the box body corresponding to the buried pipe so as to seal the box body, avoid the phase change material from leaking and improve the safety.
In specific implementation, the fluid flowing through the buried pipe 1 is a nanofluid.
The nanometer fluid is used as the heat transfer fluid, and the suspended nanometer particles in the nanometer fluid do irregular motion (Brownian force, thermal diffusion, sedimentation, dispersion and the like) under the action of the Brownian force, gravity, the friction force between the fluid and particles and the like, so that the bottom layer of the fluid flow laminar flow is damaged, the disturbance of the fluid is enhanced, the flow turbulence intensity is enhanced, the heat transfer resistance is reduced, and the heat transfer is enhanced. Meanwhile, the micro-motion of the nano-particles generates micro-convection between the particles and the liquid, and the micro-convection enhances the energy transfer process between the particles and the liquid. Because the interfacial area between the nano particles and the liquid is far larger than that of the millimeter or micron-sized particles under the condition of the same volume content of the particles, the heat conductivity coefficient of the liquid can be obviously increased by adding the nano particles into the liquid. Therefore, the nano fluid has an obvious enhancement effect on the heat exchange performance, the increase of the effective heat exchange area can be realized, and the heat exchange efficiency of the system is improved.
In specific implementation, the buried pipe 1 positioned in the heat storage and release unit is composed of spiral pipes 2 and straight pipes 3 which are alternately arranged and connected in series.
The spiral pipe can effectively increase the heat exchange area of the nanofluid and the phase-change material in the underground pipe, but also increases the flow resistance of the nanofluid in the underground pipe, so that the underground pipe is formed by alternately connecting the spiral pipe and the straight pipe in series in a comprehensive synergistic manner, the heat exchange area of the nanofluid and the phase-change material is increased, meanwhile, the disturbance of the nanofluid can be effectively guaranteed, the heat transfer is enhanced, and the heat exchange efficiency of the system is improved.
During specific implementation, a plurality of buried pipes 1 are arranged in each heat storage and release unit, and the buried pipes are metal pipelines, so that the heat exchange efficiency of the heat storage and release units and the buried pipes is enhanced.
Therefore, each buried pipe in each heat exchange module can be correspondingly connected with the buried pipe corresponding to the adjacent heat exchange module, and the inlet and the outlet of all the buried pipes of each heat exchange module can be converged into a total inlet and a total outlet which are then connected with the total inlet and the total outlet of the buried pipe corresponding to the adjacent heat exchange module.
In specific implementation, the inlet and the outlet of the buried pipe are provided with socket joints 6 which are connected in a matching way, so that the heat exchange modules can be conveniently connected; meanwhile, socket joints which are matched and connected with the outlet and the inlet of the buried pipe are respectively arranged at the liquid inlet and the liquid outlet of the heat pump unit, so that the buried pipe is conveniently connected with the heat pump unit.
Like this, heat exchange module is accomplished in factory workshop processing to set up socket joint at the import and the export of buried pipe simultaneously, when arriving on-the-spot assembly like this, only need to correspond the socket joint of cooperation connection and accept to connect and can accomplish the assembly, easy operation, swift is favorable to improving buried pipe ground source heat pump system's assembly efficiency.
In specific implementation, the phase change material is paraffin.
The paraffin with the melting point of about 22 ℃ is used as the phase change material, the paraffin is a low-temperature phase change material, and the low-temperature phase change material has the advantages of high phase change latent heat, no supercooling and precipitation phenomenon, small change of phase change temperature and phase change latent heat after repeated heat absorption and release, no toxicity, low price and the like.
The utility model discloses the mode divide into summer mode and winter mode, and its work flow is as follows:
summer mode: in summer, high-temperature nano fluid from a liquid outlet end of the heat pump unit enters the buried pipe to exchange heat with paraffin, the paraffin absorbs heat of the high-temperature nano fluid to melt into liquid, the heat absorption capacity is increased due to the action of latent heat, the absorption of the paraffin to the heat in the buried pipe can be accelerated, better heat transfer is realized, the heat is stored in the paraffin, and the temperature of the nano fluid is reduced to be low-temperature nano fluid to flow back to the heat pump unit. The whole process is repeatedly circulated until the paraffin is completely melted. During the period that the buried pipe stops operating in summer, the temperature of the buried pipe is reduced, the paraffin is transferred from a liquid phase to a solid phase, heat is released, and a higher temperature gradient is presented between the heat exchange module and the soil, so that the heat diffusivity is improved. The phase-change material can reduce the fluctuation range of soil temperature and improve the system performance.
Winter mode: in winter, the low-temperature nanofluid from the liquid outlet end of the heat pump unit absorbs heat from paraffin, and the temperature of the low-temperature nanofluid is increased to be high-temperature nanofluid and flows back to the heat pump unit. The buried pipe absorbs heat from soil, heat accumulation in the heat exchange module is increased in the phase change process, the heat absorption process of the buried pipe is facilitated, and therefore system performance is improved.
The utility model discloses the device utilizes nanometer fluid to bury intraductal heat transfer, phase change material with reinforceing and buries the outside of tubes energy storage to realize reinforceing the heat transfer and improve the heat exchange efficiency of buried pipe system horizontally. The assembled system has the advantages of simple structure, convenient installation, stable work, energy conservation, environmental protection, high efficiency, strong applicability and remarkable economic and social benefits.
Finally, it should be noted that the above-mentioned embodiments of the present invention are only examples for illustrating the present invention, and are not limitations to the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes or variations which are introduced by the technical solution of the present invention are still within the scope of the present invention.
Claims (6)
1. The assembled buried pipe ground source heat pump system comprises a buried pipe system, a heat pump unit and an air conditioner tail end system; the underground pipe system is characterized in that the underground pipe system is formed by connecting a plurality of heat exchange modules in series, each heat exchange module comprises an underground pipe and a heat storage and release unit, the heat storage and release unit is a rectangular box body which is horizontally placed, and phase change materials are filled in the box body; the buried pipe is arranged in the box body and is wrapped by the phase-change material, and two ends of the buried pipe penetrate through two corresponding surfaces of the box body, so that an inlet and an outlet of the buried pipe are formed; the inlet and the outlet of the buried pipe of the heat exchange module positioned in the middle are respectively connected with the outlet and the inlet of the buried pipe of the two adjacent heat exchange modules, and the inlet and the outlet of the buried pipe of the heat exchange module positioned at the two ends are respectively connected with the liquid outlet of the liquid outlet pipeline and the liquid inlet of the liquid inlet pipeline of the heat pump unit.
2. The assembled buried pipe ground source heat pump system of claim 1, wherein the fluid circulating in the buried pipe is a nano fluid.
3. The assembled buried pipe ground source heat pump system of claim 1, wherein the buried pipe inside the thermal storage and release unit is composed of spiral pipes and straight pipes which are alternately arranged and connected in series.
4. The assembled buried pipe ground source heat pump system of claim 1 or 3, wherein a plurality of buried pipes are arranged in each heat storage and release unit, and the buried pipes are metal pipes, so as to enhance the heat exchange efficiency between the heat storage and release unit and the buried pipes.
5. The assembled buried pipe ground source heat pump system of claim 1, wherein the inlet and the outlet of the buried pipe are provided with socket joints for connection in a matching manner, so as to facilitate connection between the heat exchange modules; meanwhile, socket joints which are matched and connected with the outlet and the inlet of the buried pipe are respectively arranged at the liquid inlet and the liquid outlet of the heat pump unit, so that the buried pipe is conveniently connected with the heat pump unit.
6. The assembled buried pipe ground source heat pump system of claim 1, wherein the phase change material is paraffin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922025297.8U CN210862312U (en) | 2019-11-21 | 2019-11-21 | Assembled buried pipe ground source heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922025297.8U CN210862312U (en) | 2019-11-21 | 2019-11-21 | Assembled buried pipe ground source heat pump system |
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| CN210862312U true CN210862312U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826130A (en) * | 2020-07-27 | 2020-10-27 | 安徽国微华芯环境科技有限公司 | Low-temperature phase-change cold-storage composite solvent, preparation method thereof and generating device |
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2019
- 2019-11-21 CN CN201922025297.8U patent/CN210862312U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826130A (en) * | 2020-07-27 | 2020-10-27 | 安徽国微华芯环境科技有限公司 | Low-temperature phase-change cold-storage composite solvent, preparation method thereof and generating device |
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