CN212212125U - Cascade phase change energy storage composite solar energy and ground source heat pump system - Google Patents
Cascade phase change energy storage composite solar energy and ground source heat pump system Download PDFInfo
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- CN212212125U CN212212125U CN201921903423.9U CN201921903423U CN212212125U CN 212212125 U CN212212125 U CN 212212125U CN 201921903423 U CN201921903423 U CN 201921903423U CN 212212125 U CN212212125 U CN 212212125U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/14—Measures for saving energy, e.g. in green houses
Abstract
The utility model discloses a compound solar energy of step phase transition energy storage and ground source heat pump system, this system mainly includes solar collector (1), step phase transition heat storage box (2), coiled heat exchanger (3), ground source heat pump (4), by parts such as perpendicular heat exchanger (5) and horizontal heat exchanger 6) the heat exchanger that constitutes, heat storage water tank (7), geothermal coiled pipe (8) and first to fourth water pump (9), (10), (11), (12) and various valves, formed these two independent loops of solar loop and ground source heat pump loop. The utility model discloses make full use of two kinds of renewable resources of geothermol power and solar energy, reduced the consumption of non-renewable energy such as coal, phase change energy storage case has played the effect of millet is filled out in the peak clipping simultaneously, has solved big-arch shelter heating energy shortage, the serious and high problem of running cost of pollution.
Description
Technical Field
The utility model relates to a heating system especially relates to a step phase change energy storage composite solar energy and ground source heat pump system for green house heating.
Background
In northern China, the construction of greenhouse greenhouses creates a warm growing environment for plants in winter, but because the greenhouse heating technology in most areas of China is still relatively backward, the greenhouse heating still faces the phenomena of high cost, serious pollution and poor effect. In addition, in order to reduce the initial investment in greenhouse construction, the enclosure structure of the greenhouse is usually formed by simply building plastic films or glass plates, so that the heat load requirement in the greenhouse in winter is high.
The traditional coal-fired heating has higher pollution and uneven hot air heating temperature, so along with the increasing serious environmental pollution and the gradual shortage of energy, the nation vigorously pushes policies such as energy conservation and emission reduction, haze treatment and the like, and governments in various places also issue corresponding methods for replacing traditional coal-fired boilers and reducing emission and consumption. With the push of policies and the positive response of farmers, the most common heating modes such as hot-blast stoves, coal-fired heating stoves and the like in greenhouse heating are gradually replaced by novel heating systems, and the development and utilization of clean energy is a great trend of greenhouse heating in future.
The ground source heat pump is an efficient, energy-saving and environment-friendly energy utilization technology utilizing underground shallow geothermal resources, and can realize energy transfer from a low-temperature heat source to a high-temperature heat source by inputting a small amount of high-grade electric energy. The heat load in winter in northern areas is far higher than the cold load in summer, and the heat recovery capability of soil is limited, so that the problem of soil temperature reduction can be faced when a single ground source heat pump operates for a long time, the evaporation temperature is reduced, and the COP is influenced.
Solar energy is widely applied as a recognized clean energy in the world due to the characteristics of direct development and utilization, convenient collection and unlimited regeneration. However, the single solar energy is greatly influenced by weather, has intermittence and unreliability, and cannot provide continuous, stable and high-density energy for the greenhouse in continuous rainy days and nights for a long time.
Chinese patent No. ZL201710830052.5 discloses a solar ground source heat pump combined energy supply system and an operation control method thereof. The system comprises a solar heat collecting system, a ground source heat pump system, a buried pipe system and the like. And by calculating the parameters of the combined operation of the solar energy and the ground source heat pump, the operation control is performed on the heat collection process, the heat storage process and the heat supplement process of the solar energy and ground source heat pump combined energy supply system. In the time period when the user needs domestic hot water, the solar energy and the ground source heat pump are used for supplying energy in a combined manner by controlling related switches and equipment; in the time period that the user does not need life hot water, the heat in the solar heat collector is transferred to the ground heat exchanger through the heat exchanger and is conveyed to the soil, and the soil is subjected to a heat supplementing process. The system has the problem that when the user terminals are scattered, the heat consumption of the user terminals is not regularly circulated, and regular switching between heat consumption and heat supplement cannot be realized. Meanwhile, if the heat consumption time of the user is far longer than the non-heat consumption time, the temperature of the soil still shows a descending trend, and the effect of solar energy heat compensation is greatly reduced.
Chinese patent No. ZL201120402886.4 discloses a system combining solar photo-thermal and ground source heat pump. The system comprises a solar photo-thermal auxiliary system, a ground source heat pump system, an indoor heating system, a control device and the like. When sunlight is sufficient and the temperature of the solar heat collector is high, the solar heat collector stores heat in the heat storage water tank and transfers the heat to the buried pipe system through the heat exchanger, so that the temperature field of the soil can be recovered quickly. When the solar photo-thermal auxiliary system cannot meet the requirement of a building, a ground source heat pump system is adopted for heating. The system has the problems that the water tank is adopted to store heat, certain requirements are required on water quality, the pipeline design is complex, and the heat storage amount is less.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a step phase change energy storage composite solar energy and ground source heat pump system for green house heating utilizes and supplies the return water difference in temperature to improve the temperature of ground source side import, thereby improves its evaporating temperature, realizes that solar energy and geothermal energy's storage recycles, solves the lower problem of present northern area ground source heat pump cop.
The utility model discloses a step phase change energy storage composite solar energy and ground source heat pump system, which comprises two independent loops, namely a solar loop and a ground source heat pump loop; wherein:
in the independent loop of the solar system, hot water generated by the solar heat collector 1 passes through a first check valve V1 and a first three-way electromagnetic valve V2 and then is divided into two paths, and one path of hot water flows through a first water pump 9 and a third three-way electromagnetic valve V7 and enters a coil type heat exchanger 3 at the heating tail end to supply heat indoors; the other path of the heat enters the step phase change heat storage tank 2 through a third electromagnetic valve V11 and a third check valve V12 and sequentially enters the three energy storage modules from top to bottom to store redundant heat; the two paths are converged at a second three-way electromagnetic valve V3, the converged backwater with lower temperature enters a heat storage water tank 7 through a second water pump 10, low-temperature water is mixed with tap water from the heat storage water tank 7 through a fifth electromagnetic valve V15 and a second check valve V4 to reduce the water temperature, the replenished water enters circulation through a first electromagnetic valve V5, the converged hot water with lower temperature enters a geothermal coil 8 to heat the roots of crops, and then returns to the solar heat collector 1 through a second electromagnetic valve V6;
in the ground source heat pump loop, the ground source heat pump 4 is divided into two paths after passing through the fourth water pump 12 and the fifth three-way electromagnetic valve V9, and one path enters the coil type heat exchanger 3 at the heating tail end through the third three-way electromagnetic valve V7 for indoor heating; the other path of the return water enters the last energy storage module of the step phase change heat storage tank 2 to store heat, and similarly, the two paths of return water are converged by a sixth three-way electromagnetic valve V10 and then return to the ground source heat pump 4;
the step phase change heat storage tank 2 is directly connected with the coil type heat exchanger 3; a third temperature sensor 15 and a fourth temperature sensor 16 are respectively arranged at two ends of the first three-way electromagnetic valve V2; the three modules of the step phase change heat storage tank 2 are respectively provided with a fifth temperature sensor 17, a seventh temperature sensor 18 and a seventh temperature sensor 19, and two sides of the first electromagnetic valve V5 are respectively provided with a first temperature sensor 13 and a second temperature sensor 14;
the system comprises the following three modes:
night heating and energy storage modes of the ground source heat pump: a fifth three-way electromagnetic valve V9 and a sixth three-way electromagnetic valve V10 are opened, a third three-way electromagnetic valve V7 opens a port I and a port II, a fourth three-way electromagnetic valve V8 opens the port I and the port II, a third water pump 11 and a fourth water pump 12 are opened, the indoor heat supply of the greenhouse is realized through the coil type heat exchanger 3, and the redundant heat is stored in the phase change heat storage tank; when the value of the seventh temperature sensor 19 is higher than the phase change temperature of the phase change material at 35 ℃, the III interfaces of the fifth three-way electromagnetic valve V9 and the sixth three-way electromagnetic valve V10 are closed; when the temperature of the greenhouse is too low and the roots of the crops are frozen or frosted, opening a connector III of a fourth three-way electromagnetic valve V8, a connector I and a connector II of a second three-way electromagnetic valve V3, a second check valve V4, a second electromagnetic valve V6, a first check valve V1, a connector I and a connector II of a first three-way electromagnetic valve V2, a first water pump 9 and a second water pump 10;
daytime solar heating and energy storage mode: the interfaces I and III of a first check valve V1, a first three-way electromagnetic valve V2 and a third three-way electromagnetic valve V7, the interfaces I and III of a fourth three-way electromagnetic valve V8, a second three-way electromagnetic valve V3, a second check valve V4, a second electromagnetic valve V6, a second electromagnetic valve V11 and a third check valve V12 are opened, the greenhouse is heated by the coil type heat exchanger 3, redundant heat is stored in the step phase change heat storage box 2, and the heat is stored by sequentially flowing through the three phase change modules; when the readings of the fifth, sixth and seventh temperature sensors 17, 18 and 19 are higher than the phase change temperature of the phase change material, the interfaces III of the first three-way electromagnetic valve V2 and the second three-way electromagnetic valve V3, the second electromagnetic valve V11 and the third check valve V12 are closed, and the energy storage is finished; meanwhile, whether the first electromagnetic valve V5 is opened or not is judged according to the reading of the first temperature sensor 13, water is supplemented, and the opening degree of the first electromagnetic valve V5 is controlled according to the reading of the second temperature sensor 14;
daytime phase change energy storage box heating mode: when the sun is cloudy or the solar energy is insufficient, the interfaces II and III of the fourth check valve V14, the fourth electromagnetic valve V13 and the third check valve V2, the interfaces I and III of the third three-way electromagnetic valve V7, the interfaces I and III of the fourth three-way electromagnetic valve V8 and the interfaces II and III of the second three-way electromagnetic valve V3 are opened, so that high-temperature hot water flows out of the first module of the phase change heat storage box and enters the coil type heat exchanger to heat the greenhouse indoor space. And the return water with lower temperature flows into a third module of the phase change heat storage tank to complete a cycle.
The ground source side of the ground source heat pump 4 is provided with two heat exchangers, namely a vertical heat exchanger 5 and a horizontal heat exchanger 6.
High-temperature hot water flowing out of the step phase change heat storage tank 2 enters the coil type heat exchanger 3 through a fourth check valve V14, a fourth electromagnetic valve V13, a first three-way electromagnetic valve V2, a third three-way electromagnetic valve V7 and a first water pump 9, is used for indoor heating, and returns to the step phase change heat storage tank 2 through a fourth three-way electromagnetic valve V8 and a second three-way electromagnetic valve V3, and is circulated.
The step phase change heat storage tank 2 is formed by combining three phase change materials with different temperatures, namely a 55 ℃ phase change material, a 45 ℃ phase change material and a 35 ℃ phase change material, and the temperature difference is not more than 10 ℃.
Compared with the prior art, the utility model, have following advantage:
1. the utility model discloses make full use of two kinds of renewable resources of geothermol power and solar energy, reduced the consumption of non-renewable energy such as coal, phase change energy storage case has played the effect of millet is filled out in the peak clipping simultaneously, has solved big-arch shelter heating energy shortage, the serious and high problem of running cost of pollution.
2. The utility model provides a combined heating system owing to establish a heat storage water tank with energy side wet return and ground source heat pump ground source side, stores partial heat, compromises the effect of heat exchanger simultaneously. Firstly, the water temperature can be reduced by controlling the flow of the water discharged from the water tank to be mixed with water supplement, so that the harm to crops caused by overhigh temperature is avoided, and secondly, the return water temperature of the solar energy is reduced, the temperature difference is increased, and the heat exchange efficiency of the solar heat collector is improved; thirdly, the heat exchange can be continuously carried out on the side of the ground source heat pump, the water inlet temperature of the inlet of the ground source side is increased, the evaporation temperature of the ground source heat pump is increased, and the cop of the ground source heat pump is increased.
3. According to the weather condition, the energy storage condition, the switching operational mode of the interior price of electricity condition and step energy storage box guarantee the utility model discloses the operation of system is high efficiency, low cost, heating respond well.
4. The utility model provides a pair of a step phase change energy storage composite solar energy and ground source heat pump system for green house heating has laid geothermal coil pipe between the crop, can improve the ground temperature in the big-arch shelter to improve crop root temperature, avoid vegetable seedling overground stem leaf to grow and develop very fast, and underground root grows and develops slowly, has leaded to vegetable seedling's thin seedling, light seedling.
5. The utility model provides a pair of a step phase change energy storage composite solar energy and ground source heat pump system for heating of green house can be used to the heating that is used for general big-arch shelter, and application scope is extensive.
Drawings
Fig. 1 is a schematic view of the overall structure of the stepped phase-change energy-storage composite solar and ground source heat pump system of the present invention.
Reference numerals:
1. the solar energy heat collector comprises a solar energy heat collector, 2, a step phase change heat storage tank, 3, a coil type heat exchanger, 4, a ground source heat pump, 5, a vertical heat exchanger (buried pipe), 6, a horizontal heat exchanger (buried pipe), 7, a heat storage water tank, 8, a geothermal coil, 9, 10, 11, 12, a first water pump, a second water pump, a third water pump, a fourth water pump, 13, 14, 15, 16, 17, 18, 19, a first temperature sensor, a seventh temperature sensor, V1, V4, V12, V14, a first check valve, a fourth check valve, V5, V6, V11, V13, V15, a first solenoid valve, a fifth solenoid valve, V2, V3, V7, V8, V9, V10 and a first solenoid valve, a sixth solenoid valve.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, it is a schematic view of the overall structure of the step phase change energy storage composite solar energy and ground source heat pump system of the present invention. The system mainly comprises a solar heat collector 1, a step phase change heat storage tank 2, a coil type heat exchanger 3, a ground source heat pump 4, a heat exchanger consisting of a vertical heat exchanger 5 and a horizontal heat exchanger 6, a heat storage water tank 7, a geothermal coil 8, first to fourth water pumps 9, 10, 11 and 12, various valves and other parts. The specific configuration and positional relationship of the respective portions are described as follows:
the solar collector 1 and the ground source heat pump 4 are two separate loops.
Hot water generated by the solar heat collector 1 passes through a first check valve V1 and a first three-way electromagnetic valve V2 and then is divided into two paths, and one path of hot water flows through a first water pump 9 and a third three-way electromagnetic valve V7 and enters a coil type heat exchanger 3 at the heating tail end to supply heat indoors; the other path of the heat enters the step phase change heat storage tank 2 through a third electromagnetic valve V11 and a third check valve V12 and sequentially enters the three energy storage modules from top to bottom to store redundant heat. The low-temperature backwater and the previous branch are converged at a second three-way electromagnetic valve V3, the converged backwater with lower temperature enters a geothermal coil 8 through a second three-way electromagnetic valve V3 and a heat storage water tank 7 to heat the root of the crop, and then returns to the solar heat collector 1 through a second electromagnetic valve V6.
The ground source heat pump 4 is divided into two paths through a fourth water pump 12 and a fifth three-way electromagnetic valve V9, and one path enters the coil type heat exchanger 3 at the heating tail end through a third three-way electromagnetic valve V7 to supply heat indoors; the other path of the return water enters the last energy storage module of the step phase change heat storage tank 2 to store heat, and similarly, the two paths of return water are converged by a sixth three-way electromagnetic valve V10 and return to the ground source heat pump 4 to complete a cycle.
The ground source side of the ground source heat pump 4 is provided with two heat exchangers including a horizontal heat exchanger 6 and a vertical heat exchanger 5 which alternately operate to improve the soil recovery capability; meanwhile, the geothermal coil 8 laid between the crops can also store energy for the soil, so that the speed of soil temperature recovery is improved.
High-temperature hot water flowing out of the phase change energy storage tank 2 enters the coil type heat exchanger 3 through the fourth check valve V14, the fourth electromagnetic valve V13, the first three-way electromagnetic valve V2, the third three-way electromagnetic valve V7 and the first water pump 9 to supply heat indoors, and then returns to the step phase change heat storage tank 2 through the fourth three-way electromagnetic valve V8 and the second three-way electromagnetic valve V3 to complete a cycle.
The step phase change heat storage tank 2 is formed by combining three phase change materials with different temperatures, namely a 55 ℃ phase change material, a 45 ℃ phase change material and a 35 ℃ phase change material, and the temperature difference is not more than 10 ℃. The hot water from the solar heat collector 1 flows through the phase change module at 55 ℃ due to high temperature, fully exchanges heat with the phase change module, and then sequentially enters the other two phase change modules. And the hot water from the ground source heat pump 4 directly enters the 35 ℃ phase change module to exchange heat with the phase change module and then flows back due to low temperature. Meanwhile, fifth, sixth and seventh temperature sensors 17, 18 and 19 are respectively arranged in the three phase change modules and connected with an external controller, so that the internal temperature value can be read conveniently. When the read temperature is higher than the phase transition temperature, the stored heat is considered to be sufficient, and the port iii of the first three-way solenoid valve V2 or the port iii of the fifth three-way solenoid valve V9 is closed.
In order to prevent the unfavorable growth of crops caused by overhigh return water temperature, a heat storage water tank 7 is arranged in front of the second water pump 10, the flow is controlled through a fifth electromagnetic valve V15, when the numerical value of the first temperature sensor 13 is overhigh, the first electromagnetic valve V5 is opened to supplement water, the water temperature is reduced, the opening degree of the first electromagnetic valve V5 is controlled through judging the reading of the second temperature sensor 14, and therefore the temperature of water entering the geothermal coil 8 is adjusted.
The solar heat collector 1 is one of a flat plate heat collector, a vacuum tube heat collector or a heat tube heat collector and is arranged at the top of the greenhouse through a support; the water in the solar collector 1 is still circulated, so that frost cracking of the pipes can be avoided
The user end is provided with a coil type heat exchanger 3 and a geothermal coil 8, hot water firstly flows through the coil type heat exchanger 3 to heat the greenhouse in a convection mode, and then flows through the geothermal coil 8 to maintain the root temperature required by crop growth; a temperature sensor and a water replenishing device are arranged between the water tank and the water tank, so that the phenomenon that the water temperature is too high and the crops are damaged is avoided.
The ground source side is respectively provided with a horizontal buried pipe and a vertical buried pipe, and a heat storage water tank is arranged between the heating side backwater and the ground source side water supply.
At night, the water in the solar heat collector is still circulated, so that frost cracking of the pipeline can be avoided
The step phase change heat storage water tank is made of phase change materials with three temperatures.
The working process of the utility model is as follows:
night heating and energy storage modes of the ground source heat pump: the fifth three-way electromagnetic valve V9 and the sixth three-way electromagnetic valve V10 are opened, the third three-way electromagnetic valve V7 opens the interfaces I and II, the fourth three-way electromagnetic valve V8 opens the interfaces I and II, the third water pump 11 and the fourth water pump 12 are opened, the greenhouse is heated indoors through the coil heat exchanger 3, and redundant heat is stored in the phase change heat storage tank. And when the value of the seventh temperature sensor 19 is higher than the phase change temperature of the 35 ℃ phase change material, closing the III interfaces of the fifth three-way electromagnetic valve V9 and the sixth three-way electromagnetic valve V10. When the temperature of the greenhouse is too low and the roots of the crops are frost-cracked or frosted, the interface III of the fourth three-way electromagnetic valve V8 is opened, the interfaces I and II of the second three-way electromagnetic valve V3, the second check valve V4, the second electromagnetic valve V6, the first check valve V1, the interfaces I and II of the first three-way electromagnetic valve V2, the first water pump 9 and the second water pump 10 are opened.
Daytime solar heating and energy storage mode: first check valve V1, first three-way solenoid valve V2, I of third three-way solenoid valve V7, III interfaces, I of fourth three-way solenoid valve V8, III interfaces, second three-way solenoid valve V3, second check valve V4, second solenoid valve V6 and second solenoid valve V11, third check valve V12 open, heat for the big-arch shelter is indoor through coiled heat exchanger 3, and store unnecessary heat in step phase change heat storage box 2, flow through three phase change module in proper order and carry out the heat-retaining. And when the readings of the fifth, sixth and seventh temperature sensors 17, 18 and 19 are higher than the phase change temperature of the phase change material, the interfaces III of the first three-way electromagnetic valve V2 and the second three-way electromagnetic valve V3, the second electromagnetic valve V11 and the third check valve V12 are closed, and the energy storage is finished. Meanwhile, whether the first electromagnetic valve V5 is opened or not is judged according to the reading of the first temperature sensor 13, water is supplemented, and the opening degree of the first electromagnetic valve V5 is controlled according to the reading of the second temperature sensor 14.
Daytime phase change energy storage box heating mode: when the sun is cloudy or the solar energy is insufficient, the interfaces II and III of the fourth check valve V14, the fourth electromagnetic valve V13 and the third check valve V2, the interfaces I and III of the third three-way electromagnetic valve V7, the interfaces I and III of the fourth three-way electromagnetic valve V8 and the interfaces II and III of the second three-way electromagnetic valve V3 are opened, so that high-temperature hot water flows out of the first module of the phase change heat storage box and enters the coil type heat exchanger to heat the greenhouse indoor space. And the return water with lower temperature flows into a third module of the phase change heat storage tank to complete a cycle.
The utility model provides a step phase transition heat storage case compares traditional energy storage water tank, and this energy storage case comprises three kinds of phase change material. Solar high-temperature hot water flows through the phase-change materials at 55 degrees, 45 degrees and 35 degrees respectively, so that the solar high-temperature hot water can fully exchange heat, exergy loss is reduced, and the water temperature of the user side of the ground source heat pump is lower, so that the solar high-temperature hot water is only connected with the phase-change materials at 35 degrees. The phase-change heat storage box stores heat of the ground source heat pump at night by using valley price electricity, and the heat is utilized in the daytime, so that the operation cost of heating the greenhouse is reduced.
Claims (3)
1. A cascade phase change energy storage composite solar energy and ground source heat pump system is characterized in that the system comprises two independent loops of a solar energy loop and a ground source heat pump loop; wherein:
in an independent loop of the solar system, hot water generated by a solar heat collector (1) passes through a first check valve (V1) and a first three-way electromagnetic valve (V2) and then is divided into two paths, and one path of hot water flows through a first water pump (9) and a third three-way electromagnetic valve (V7) and enters a coil type heat exchanger (3) at the tail end of heating to supply heat indoors; the other path of the heat enters the step phase change heat storage tank (2) through a third electromagnetic valve (V11) and a third check valve (V12) and sequentially enters the three energy storage modules from top to bottom to store redundant heat; the two paths are converged at a second three-way electromagnetic valve (V3), the converged backwater with lower temperature enters a heat storage water tank (7) through a second water pump (10), low-temperature water is mixed with tap water from the heat storage water tank (7) through a fifth electromagnetic valve (V15) and a second check valve (V4) to reduce the water temperature, the supplemented water enters circulation through a first electromagnetic valve (V5), the converged hot water with lower temperature enters a geothermal coil pipe (8) to supply heat to the root of a crop, and the converged hot water returns to a solar heat collector (1) through a second electromagnetic valve (V6);
in the ground source heat pump loop, a ground source heat pump (4) is divided into two paths after passing through a fourth water pump (12) and a fifth three-way electromagnetic valve (V9), and one path enters a coil type heat exchanger (3) positioned at the tail end of heating through a third three-way electromagnetic valve (V7) to supply heat indoors; the other path of the return water enters the last energy storage module of the step phase change heat storage box (2) to store heat, and the two paths of return water are converged back to the ground source heat pump (4) through a sixth three-way electromagnetic valve (V10);
the step phase change heat storage tank (2) is directly connected with the coil type heat exchanger (3); a third temperature sensor and a fourth temperature sensor (15, 16) are respectively arranged at two ends of the first three-way electromagnetic valve (V2); fifth to seventh temperature sensor (17, 18, 19) are respectively arranged in three modules of the step phase change heat storage tank (2), and first and second temperature sensors (13, 14) are respectively arranged on two sides of the first electromagnetic valve (V5).
2. The stepped phase change energy storage composite solar and ground source heat pump system according to claim 1, wherein the ground source side of the ground source heat pump (4) is provided with two heat exchangers, a vertical heat exchanger (5) and a horizontal heat exchanger (6).
3. The stepped phase-change energy storage composite solar and ground source heat pump system according to claim 1, wherein high-temperature hot water flowing out of the stepped phase-change heat storage tank (2) enters the coil heat exchanger (3) through a fourth check valve (V14), a fourth solenoid valve (V13), a first three-way solenoid valve (V2), a third three-way solenoid valve (V7) and the first water pump (9) to supply indoor heat, and then returns to the stepped phase-change heat storage tank (2) through the fourth three-way solenoid valve (V8) and the second three-way solenoid valve (V3) to form a cycle.
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| CN201921903423.9U CN212212125U (en) | 2019-11-06 | 2019-11-06 | Cascade phase change energy storage composite solar energy and ground source heat pump system |
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| CN201921903423.9U CN212212125U (en) | 2019-11-06 | 2019-11-06 | Cascade phase change energy storage composite solar energy and ground source heat pump system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113531919A (en) * | 2021-07-06 | 2021-10-22 | 西安交通大学 | Multisource complementary railway turnout snow and ice melting system and method |
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| CN113531919A (en) * | 2021-07-06 | 2021-10-22 | 西安交通大学 | Multisource complementary railway turnout snow and ice melting system and method |
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