CN110779131A - Energy complementary passive house based on energy storage Trombe wall and soil-air heat exchange system - Google Patents

Abstract

The invention relates to an energy storage-based Trombe wall and soil-air heat exchange system energy complementary passive house, which comprises a soil-air heat exchange system, a Trombe wall cavity, a phase-change energy storage external wall hot water system, a phase-change storage Can be used inside walls and building bodies. This invention combines the Trombe wall cavity with the soil-air heat exchange system for the first time. In summer, it can provide fresh and high-quality cooling air for the indoor without using a fan, and truly realize zero energy consumption of the building. In winter, it can be used for indoor heating. Provides a more comfortable supply air temperature. The application of different phase change energy storage units in the system can not only improve the heat exchange efficiency of the system and reduce the fluctuation of indoor temperature, but also achieve the purpose of intermittent operation of the soil-air heat exchange system, avoiding the long-term continuous operation of the system and causing it. Efficiency drops significantly. In addition, the system can be used as a heat-generating end to prepare domestic hot water in summer, and provide a suitable air supply temperature for indoors when the solar radiation is insufficient in winter.

Description

Energy Complementary Passive House Based on Energy Storage Trombe Wall and Soil-Air Heat Exchange System

technical field

The invention relates to an energy-complementary passive house based on an energy-storage Trombe wall and a soil-air heat exchange system, belonging to the application of renewable energy technology in the field of building energy conservation.

Background technique

At present, building energy consumption has become the three major "energy-consuming households" in my country's energy consumption, along with transportation energy consumption and industrial energy consumption. increasingly obvious. In building energy consumption, cooling and heating energy consumption is the most important form of energy consumption. With the improvement of people's living standards, the requirements for the living environment are getting higher and higher, so people begin to use air conditioners to ensure the thermal comfort of the indoor environment. The large-scale use of air conditioners not only aggravates the increase of building energy consumption, but also causes certain environmental pollution and greenhouse effect due to the use of refrigerants. In addition, people cannot open windows for ventilation in time in an air-conditioned environment for a long time, which will inevitably lead to a decrease in indoor air quality and cause "air conditioning syndrome" such as dizziness. Opening windows for ventilation will sharply increase building energy consumption. In order to reduce building energy consumption, we need to use clean and environmentally friendly renewable energy. Under the trend of low-carbon energy saving, geothermal energy and solar energy, as the most common new energy utilization technologies, have been favored by more and more people.

As one of the most common geothermal energy utilization methods, the soil-air heat exchange system has been widely used in building energy-saving technologies. Compared with other geothermal energy utilization technologies, the soil-air heat exchange system has the advantages of simple equipment and low operating costs. And the system can provide fresh air for the indoor to a certain extent. However, the traditional soil-air heat exchange system often adopts the form of horizontal buried pipe, which has the disadvantages of large floor space, high soil temperature in shallow layers, and difficulty in centralized drainage of condensed water. The buried pipe is set with a certain slope, but the condensed water that condenses on the pipe wall is difficult to be quickly and concentratedly discharged. If the condensed water adheres to the pipe wall for a long time, mold and lesions will inevitably occur, thus affecting the air quality of the system. In addition, the heat storage capacity of the soil is limited. When the traditional system runs continuously for a long time, the heat exchange efficiency of the system decreases rapidly, that is, the soil temperature around the buried pipe rises/drops significantly after a period of operation (summer/winter) . Although the patent (authorization number: CN 206670100 U) proposes a vertical buried pipe tunnel ventilation system, the patent has the following three problems: 1) The system uses PE pipe material, and the PE pipe has a low compressive capacity, and the pipe is buried to a certain extent. After the depth of the pipe, there is a serious flattening phenomenon, and the heat exchange capacity of the PE pipe is low; 2) The condensed water treatment is not reasonable enough, it mainly uses two variable diameter butt joints to reduce the contact between the air and the condensed water, and the bottom is set The drain pipe and the suction pump are used to centrally discharge the condensed water. The use of variable diameter is easy to damage during the construction of the buried pipe. In addition, the lift of the traditional suction pump is small, and it is difficult to absorb water when the depth exceeds 10.5m. 3) The lower buried pipe with effective heat exchange is directly in contact with the soil, and there is no phase change energy storage structure, but the heat storage capacity of the soil is limited, so the efficiency of the system decreases rapidly during operation.

The Trombe wall is a heat-collecting wall without mechanical power that only relies on passive solar energy collection to heat the building. It was proposed by Professor Felix Trombe of the French Solar Energy Laboratory. This structure can effectively reduce the annual heating energy consumption of the building, and can Improve indoor thermal comfort. But in summer, Trombe walls can cause the interior to overheat. In the prior art, Trombe walls are generally used for heating in winter, and traditional external shading methods are often used to reduce heat load in summer. Zhou Yan et al. proposed a double-storey building test bench with a Trombe wall structure (authorization number: CN 206531652 U). The patent describes the operation principle of the traditional Trombe wall and verifies its ability to improve indoor thermal comfort. However, the patent does not take into account the many problems that exist in the actual operation of the Trombe wall, such as excessive dependence on solar radiation and thermal instability. Juna et al. proposed a self-regulating phase-change Trombe wall (authorization number: CN 106836522 A), which can effectively solve the problems of insufficient heating in winter and overheating in summer when the traditional Trombe wall has no sun. However, the patent does not consider how to utilize the heat generated by the Trombe wall in summer, nor does it consider the pulling effect of the Trombe wall due to thermal pressure as a power source for other energy-saving technologies. The peak heat generated by the solar energy is reduced and the influence of its external wall temperature is reduced. Similarly, the patents with the authorization numbers of CN 104314196 A, CN 103790244 A and CN 208154693U only consider the effect of the Trombe wall in improving the indoor environment in winter, but cannot make good use of its wind-pulling effect in summer As a power source for other technologies, and the use of the Trombe wall to generate excess heat in summer as a heat source for other media has not been taken into account, it is difficult to make full use of the Trombe wall in summer.

In order to solve the above technical problems, the present invention provides an energy-complementary passive house based on energy storage between Trombe wall and soil-air heat exchange system, which has the following five advantages compared to the traditional Trombe wall and soil-air heat exchange system: 1. ) Coupling the Trombe wall with the soil-air heat exchange system. In summer, the air in the Trombe wall cavity is heated to generate thermal pressure to form a draft effect, thereby providing power for the soil-air heat exchange system. The outdoor air passes through the heat exchange with the underground soil. After cooling, it can be sent indoors to achieve indoor cooling and provide fresh air. Since the system does not require fans to provide power in summer, it truly realizes zero energy consumption of the building; in winter, the outdoor air first passes through the soil-air heat exchange system It is preheated and the preheated air is reheated by the Trombe wall cavity and thus sent to the room for heating. 2) The vertical buried pipe soil-air heat exchange system has a slope of 90°. Compared with the horizontal buried pipe system, the condensed water can be quickly concentrated to the bottom and discharged. The bottom of the buried pipe is composed of the upper ventilation pipe and the lower one. In order to avoid the influence of condensed water on the flowing air in the pipeline, the two are separated to provide fresh and high-quality cooling air for the room. 3) A phase change energy storage structure is arranged around the buried pipe of the soil-air heat exchange system. Since the latent heat of the phase change energy storage material is much larger than that of the soil, it can prevent the soil temperature from rising/falling too fast and reducing its operation efficiency. The air provides enough energy to improve the operating efficiency of the system. 4) The phase change energy storage exterior wall hot water system structure can prolong the working time of the Trombe wall cavity, that is, when the solar radiation is insufficient, the phase change material releases energy to maintain a certain temperature in the cavity; when the solar radiation is sufficient, the Trombe wall is empty. The heat generated by the cavity can be transferred into the hot water pipe through the phase change material, thereby generating hot water at a certain temperature for indoor heating and domestic hot water, so as to maximize the use of solar energy; in winter, the system can be used when the solar radiation is insufficient. Trombe wall cavities provide heat to meet indoor air supply requirements in winter. 5) The soil-air heat exchange system is combined with the inner wall of the phase change energy storage. Under the condition of maintaining the indoor temperature fluctuation range, the purpose of intermittent operation of the soil-air heat exchange system can also be realized, avoiding the continuous operation of the soil-air heat exchange system. Long-term operation results in a significant decrease in its operating efficiency.

SUMMARY OF THE INVENTION

In order to achieve the above object, the present invention adopts the following technical scheme: a kind of energy-complementary passive house based on energy storage Trombe wall and soil-air heat exchange system, which mainly includes soil-air heat exchange system, Trombe wall cavity, phase change storage system. The external wall hot water system, the phase change energy storage internal wall and the building body; the soil-air heat exchange system is composed of vertical U-shaped buried pipes. Because the pipe inclination angle is 90°, the system can make the system in summer. During operation, the condensed water generated by the pipe wall is rapidly concentrated to the bottom of the U-shaped buried pipe by gravity. The lower part of the U-shaped buried pipe is provided with a collection and drainage bypass, and a ring-shaped phase change energy storage structure is provided below the depth of 5m of the U-shaped buried pipe. The pipe is wrapped, and the air outlet branch pipe with a U-shaped buried pipe more than 5m is provided with an insulation layer; the Trombe wall cavity is coupled with the soil-air heat exchange system. In summer, the wind pulling effect caused by the heated air in the Trombe wall cavity can be The soil-air heat exchange system provides power, thereby reducing the use of fans; in winter, the Trombe wall cavity can reheat the outdoor air after the soil-air heat exchange system is preheated to meet the indoor air supply requirements. The phase change energy storage external wall hot water system is located on the side of the Trombe wall cavity against the wall, and is mainly composed of a hot water pipe and a phase change energy storage layer. In summer, the air in the Trombe wall cavity is heated, and the excess heat It will be transmitted to the external wall of phase change energy storage to heat the hot water pipe to generate hot water. At the same time, the external wall of phase change energy storage will release heat when the solar radiation is insufficient, which can prolong the time of the wind pulling effect in the cavity of the Trombe wall, which is the soil-air exchange. The thermal system provides more lasting power; the inner wall of the phase change energy storage adopts modular splicing and installation, and the inner wall of the phase change energy storage can not only reduce the fluctuation of indoor temperature, but also realize the intermittent operation of the soil-air heat exchange system conditions, thereby improving the operating efficiency of the system.

The material of the U-shaped buried pipe of the soil-air heat exchange system is stainless steel, with a thickness of 2 mm and a pipe diameter of 200-250 mm; the bottom of the U-shaped buried pipe is composed of an upper ventilation pipe and a lower collection and drainage tank. , the ventilation pipe and the collecting and draining tank are separated by a circular baffle and a cover plate welded on the upper part of the water pump, so as to avoid the contact between the flowing air in the pipe and the condensed water and affecting the air quality; the middle of the circular baffle Set a 5mm pressure hole, the diameter of the water pump cover is 5mm different from the diameter of the U-shaped pipe; the slope of the ventilation pipe and the collecting and draining tank is 5°; the right branch pipe of the collecting and draining tank is provided with a drain pump, and two water levels are set The sensor thus drains the condensed water produced in time.

The thickness of the annular phase change material structure outside the U-shaped buried pipe is 5cm, and the phase change material is a composite material of paraffin and expanded graphite, wherein expanded graphite accounts for 20% and paraffin accounts for 80%; The phase change material is arranged around the buried pipe to store the energy in the soil, and the energy is released to the air in the pipe when the system is running, thereby increasing the operating efficiency of the system; the phase change material structure is encapsulated by the PVC pipe, and the interface is strictly Seal it to prevent it from leaking into the soil.

The Trombe wall cavity is composed of a double-layer vacuum glass cover surrounding the phase change energy storage external wall hot water system, the thickness of the cavity is 400-500mm, and the top of the Trombe wall cavity is provided with an air outlet and the corresponding air valve, the lower part of which is connected with the soil-air heat exchange system; the Trombe wall cavity is connected with the indoor environment through the upper and lower air outlets and the corresponding air valve.

The hot water pipe of the phase-change energy storage external wall hot water system is wrapped by a phase-change energy-storage plate, the sun-facing side of the phase-change energy-storage plate is coated with heat-absorbing material, and the interior of the phase-change energy storage plate is provided with fins, The hot water pipe is connected with a hot water storage tank or other heating system. The phase change energy storage exterior wall hot water system can be used as a heat generating end in summer, and can provide heat for the Trombe wall cavity in winter when the solar radiation is insufficient.

The phase change energy storage inner wall is a modular assembly, which is adhered to the inner wall of the building body. The phase change energy storage wall can not only adjust the fluctuation of indoor temperature, but also is compatible with the soil-air heat exchange system. The coupling enables intermittent operation of the system, allowing the soil temperature to recover in time.

The pipeline insulation layers used in the system are all polyurethane, the thickness of the polyurethane is 5cm, and the outer layer of the polyurethane is wrapped with PVC to avoid the influence of the thermal insulation performance due to the moisture in the soil; the system is located in the phase change energy storage board and the building. The thermal insulation material between the bodies is an extruded plastic board with a thickness of 5cm.

The beneficial effects of the present invention are:

The present invention provides an energy storage-based Trombe wall and soil-air heat exchange system energy complementary passive house, which has the following five advantages compared with the traditional Trombe wall and soil-air heat exchange system: 1) Trombe wall and soil- The air heat exchange system is coupled to the application. In summer, the air in the cavity of the Trombe wall is heated to generate thermal pressure to form a draft effect, thereby providing power for the soil-air heat exchange system. To achieve the purpose of indoor cooling and supplying fresh air, since the system does not require fans to provide power in summer, it truly realizes zero energy consumption of the building; in winter, the outdoor air is preheated by the soil-air heat exchange system, and the The warmed air is reheated by the Trombe wall cavity and sent to the room for heating. 2) The vertical buried pipe soil-air heat exchange system has a slope of 90°. Compared with the horizontal buried pipe system, the condensed water can be quickly concentrated to the bottom and discharged. The bottom of the buried pipe is composed of the upper ventilation pipe and the lower one. In order to avoid the influence of condensed water on the flowing air in the pipeline, the two are separated to provide fresh and high-quality cooling air for the room. 3) A phase change energy storage structure is arranged around the buried pipe of the soil-air heat exchange system. Since the latent heat of the phase change energy storage material is much larger than that of the soil, it can prevent the soil temperature from rising/falling too fast and reducing its operation efficiency. The air provides enough energy to improve the operating efficiency of the system. 4) The phase change energy storage exterior wall hot water system structure can prolong the working time of the Trombe wall cavity, that is, when the solar radiation is insufficient, the phase change material releases energy to maintain a certain temperature in the cavity; when the solar radiation is sufficient, the Trombe wall is empty. The heat generated by the cavity can be transferred into the hot water pipe through the phase change material, thereby generating hot water at a certain temperature for indoor heating and domestic hot water, so as to maximize the use of solar energy; in winter, the system can be used when the solar radiation is insufficient. Trombe wall cavities provide heat to meet indoor air supply requirements in winter. 5) The soil-air heat exchange system is combined with the inner wall of the phase change energy storage. Under the condition of maintaining the indoor temperature fluctuation range, the purpose of intermittent operation of the soil-air heat exchange system can also be realized, avoiding the continuous operation of the soil-air heat exchange system. Long-term operation results in a significant decrease in its operating efficiency.

Description of drawings

Figure 1 is a schematic diagram of the overall system.

Figure 2 Schematic diagram of the system Trombe wall cavity and phase change energy storage external wall hot water system.

Figure 3 Schematic diagram of the bottom bypass of the soil-air heat exchange system.

Fig. 4 Schematic diagram of the summer operation of the system.

Figure 5 Schematic diagram of the winter operation of the system.

The meanings of the reference numerals in the figure are as follows:

I-Enlarged schematic diagram of the cavity section of the Trombe wall; II-Enlarged schematic diagram of the bypass section at the bottom of the soil-air heat exchange system;

1-air inlet; 2-drain pipe; 3-U-shaped buried pipe; 4-annular phase change material structure; 5-pipe insulation; 6-pipe air supply branch pipe; 7-indoor air inlet; 8-air valve 1; 9-Trombe wall cavity air inlet; 10-Damp valve 2; 11-Trombe wall cavity inner and lower air outlet; 12-Damp valve 3; 13-Trombe wall cavity inner air inlet; 14-Damp valve 4; Air outlet on wall cavity; 16- air valve 5; 17- building body; 18- phase change inner wall; 19- silent fan; 20- air valve 6; 21- indoor air outlet; 22- wall insulation layer ;23-exterior wall hot water pipe;24-phase change energy storage module;25-Trombe wall cavity;26-double-layer vacuum glass curtain wall;27-heat-absorbing coating;28-bypass ventilation pipe;29-power cord; 30-water pump cover plate; 31-water level sensor 1; 32-condensate water; 33-water pump; 34-water level sensor 2; 35-bottom bypass slope; 36-circular baffle; 37-pressure hole; 38-row sink.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. However, the accompanying drawings are provided only for a better understanding of the present invention, and they should not be construed to limit the present invention.

As shown in Figure 1, the present invention provides an energy storage-based Trombe wall and a soil-air heat exchange system energy complementary passive house, including a soil-air heat exchange system, a Trombe wall cavity, a phase-change energy storage external wall heat Water system, inner wall of phase change energy storage and building body; the soil-air heat exchange system is composed of vertical U-shaped buried pipe 3, which can make the condensed water generated by the pipe wall rapidly concentrated to the U-shaped pipe by gravity The bottom of the U-shaped buried pipe is provided with a ventilation bypass 28 and a collection and drainage groove 38, and the U-shaped buried pipe is provided with an annular phase change energy storage structure 4 wrapping the pipeline below the depth of 5m. The air outlet branch pipe is provided with an insulating layer 5; the Trombe wall cavity is coupled with the soil-air heat exchange system, and the Trombe wall cavity 25 provides power for the soil-air heat exchange system through the pulling effect of the heated air in summer, avoiding the With the use of fans, the Trombe wall cavity can reheat the outdoor air after preheating the soil-air heat exchange system in winter to meet the indoor air supply requirements; the phase change energy storage exterior wall hot water system is located in the Trombe wall cavity It is mainly composed of a hot water pipe 23 and a phase change energy storage module 24. In summer, the air in the cavity of the Trombe wall is heated, and the excess heat will be transferred to the phase change energy storage module 24 to heat the hot water pipe 23 to generate heat. At the same time, the phase-change energy storage module 24 releases heat when the solar radiation is insufficient, so as to prolong the wind-pulling effect time of the Trombe wall cavity 25; The inner wall 18 can not only reduce the fluctuation of indoor temperature, but also realize the intermittent operation condition of the soil-air heat exchange system, thereby improving the operation efficiency of the system.

The material of the U-shaped buried pipe 3 of the soil-air heat exchange system is stainless steel, with a thickness of 2 mm and a pipe diameter of 200-250 mm; the bottom of the U-shaped buried pipe is composed of the upper ventilation pipe 28 and the lower collection It is composed of a water tank 38, and the ventilation pipe 28 and the collection and drainage tank 38 are separated by a circular baffle 36 and a cover plate 30 welded on the upper part of the water pump, so as to avoid the contact between the flowing air in the pipe and the condensed water and affect the air quality; The pressure hole 37 of 5mm is arranged in the middle of the described circular baffle plate, and the diameter of the water pump cover plate 30 differs from the diameter of the U-shaped buried pipe 3 by 5mm; The right branch pipe of the water tank 38 is provided with a drain pump 33 and water level sensors 31 and 34. When the water level of the condensed water reaches the sensor 31, the drain pump 33 controls the system to open to discharge the generated condensed water in time. The pump 33 control system is turned off.

The thickness of the annular phase change material structure 4 outside the U-shaped buried pipe 3 is 5 cm, and the phase change material is a composite material of paraffin and expanded graphite, wherein the expanded graphite accounts for 20% and the paraffin accounts for 80%; The phase change material is arranged around the buried pipe to store the energy in the soil, and the energy is released to the air in the pipe when the system is running, thereby increasing the operating efficiency of the system.

The Trombe wall cavity 25 is formed by a double-layer vacuum glass cover 26 surrounding the phase-change energy storage external wall hot water system, the thickness of the cavity 25 is 400-500mm, and the Trombe wall cavity 25 The upper part is provided with an air outlet 15 and a corresponding air valve 16, and its lower part is connected with the soil-air heat exchange system through the air valve 10; the described Trombe wall cavity 25 passes through the upper and lower air outlets 13, 11 and the corresponding air valve 14, 12 Connect with the indoor environment.

The hot water pipe 23 of the phase change energy storage external wall hot water system is wrapped by the phase change energy storage plate 24, the sun side of the phase change energy storage plate 24 is coated with a heat absorbing material 27, and the interior of the phase change energy storage plate 24 is coated with a heat absorbing material 27. Fins are provided, and the hot water pipe 23 is connected to a hot water storage tank or other heating system. The phase change energy storage exterior wall hot water system can be used as a heat generating end in summer, and can provide heat for Trombe wall cavity 25 when solar radiation is insufficient in winter, so as to meet indoor air supply requirements in winter.

The pipeline insulation layer 5 used in the system is all polyurethane, the thickness of the polyurethane is 5cm, and the outer layer of the polyurethane is wrapped with PVC to avoid affecting its thermal insulation performance due to moisture in the soil; the phase change energy storage board 24 is located in the system. The material of the thermal insulation layer 22 between the building body 17 is extruded plastic board, and the thickness is 5cm.

The present invention will be further described below with reference to Figures 4 and 5 , through embodiments of operating conditions of the system in winter and summer.

Example 1, summer:

Referring to Figure 4, dampers 8, 12 and 16 are open and dampers 10, 14 and 20 are closed. The temperature of the trombe wall cavity 25 is increased by the irradiation of solar radiation, and the temperature of the air in the cavity 25 rises and is discharged from the air outlet 15, causing the air pressure at the bottom of the cavity to decrease, forming an air drive from the room to the cavity. Force, the indoor air pressure becomes smaller and further promotes the air flow in the buried pipe 3, the outdoor hot air is cooled by heat exchange with the soil and then sent into the room to provide cooling capacity for it, because the system does not require a fan in summer. Power, the real realization of building zero energy consumption. The Trombe wall cavity 25 also transfers heat to the phase change energy storage module 24 when the system is running, and then transfers it to the medium of the hot water pipe 23 to generate a certain amount of hot water through circulation. In addition, when the solar radiation is insufficient, the phase change energy storage module 24 releases heat, thereby preventing the temperature decrease in the cavity 25 of the Trombe wall and prolonging the operating time of the system. The cold air entering the room maintains the constant indoor air temperature by exchanging heat with the phase change energy storage inner wall 18. When the indoor temperature is maintained at a certain 22-26°C, the air valve 8 can be closed, thereby realizing soil-air heat exchange In the intermittent operating condition of the system, when the indoor temperature is greater than 26°C, the air valve 8 is opened, and the system starts to operate again.

Example 2, winter:

Referring to Figure 5, dampers 10, 14 and 20 are open and dampers 8, 12 and 16 are closed. The outdoor cold air is first preheated by the soil-air heat exchange system through the buried pipe 3, and the preheated air enters the Trombe wall cavity 25 through the tuyere 9 for reheating, and the reheated air is sent into the room through the fan 19. , so as to satisfy indoor thermal comfort, and the air after indoor heat exchange is discharged outdoors through the air outlet 21 . When the outdoor solar radiation cannot meet the air heating requirements of the cavity 25, the phase change energy storage external wall hot water system is activated, that is, the phase change energy storage module 24 is heated through the auxiliary heat source, and the preheated cavity is further heated. air, so as to meet the requirements of indoor air supply temperature in winter.

The above embodiments are only used to illustrate the technical solutions of the present invention. Those skilled in the relevant fields can make various changes or modifications without departing from the spirit and scope of the present invention, which shall be included in the protection scope of the present invention. Inside.

Claims (6)

1. Trombe wall and soil-air heat exchange system energy complementation passive room based on energy storage, its characterized in that: the passive house mainly comprises a soil-air heat exchange system, a Trombe wall cavity, a phase-change energy-storage outer wall hot water system, a phase-change energy-storage inner wall body and a building body; the soil-air heat exchange system is composed of vertical U-shaped buried pipes, condensed water generated by the pipe walls can be rapidly concentrated to the bottoms of the U-shaped buried pipes due to the action of gravity, wherein a water collecting and draining bypass is arranged at the lower parts of the U-shaped buried pipes, an annular phase change energy storage structure wrapping pipeline is arranged below the U-shaped buried pipes by 5m in depth, and an insulating layer is arranged on an air outlet branch pipe above the U-shaped buried pipes by 5 m; the Trombe wall cavity is coupled with the soil-air heat exchange system, the Trombe wall cavity provides power for the soil-air heat exchange system through a draft effect caused by heating air in summer so as to avoid the use of a fan, and the Trombe wall cavity can reheat outdoor air preheated by the soil-air heat exchange system in winter so as to meet the requirement of indoor air supply; the phase-change energy-storage outer wall hot water system is positioned in a Trombe wall cavity and mainly comprises a hot water pipe and a phase-change energy-storage outer wall, air in the Trombe wall cavity is heated in summer, redundant heat can be transferred to the phase-change energy-storage outer wall so as to heat the hot water pipe to generate hot water, the phase-change energy-storage outer wall hot water system can be used as a heat generating end in summer, heat can be provided for the Trombe wall cavity when solar radiation is insufficient in winter, and meanwhile the phase-change energy-storage outer wall releases heat when the solar radiation is insufficient so as to prolong the Trombe wall cavity wind-pulling effect time; the phase-change energy storage inner wall body is installed in a modularized splicing mode, the fluctuation of indoor temperature can be reduced, and the intermittent operation working condition of the soil-air heat exchange system can be realized, so that the operation efficiency of the system is improved.

2. The energy-storage-based Trombe wall and soil-air heat exchange system energy complementation passive room as claimed in claim 1, wherein the U-shaped buried pipe is made of stainless steel, has a thickness of 2mm and a pipe diameter of 200-250 mm; the bottom of the U-shaped buried pipe consists of an upper ventilating pipeline and a lower water collecting and draining groove, and the ventilating pipeline and the water collecting and draining groove are separated by a circular baffle and a cover plate welded on the upper part of the water pump, so that the air quality is prevented from being influenced by the contact of flowing air and condensed water in the pipeline; a pressure hole with the diameter of 5mm is formed in the middle of the circular baffle, and the difference between the diameter of the water pump cover plate and the diameter of the U-shaped pipe is 5 mm; the gradient of the ventilation pipeline and the water collection and drainage pipeline is 5 degrees; the right branch pipe of the water collecting and draining pipeline is provided with a draining pump and two water level sensors are arranged to drain the produced condensed water in time.

3. The energy-storage-based Trombe wall and soil-air heat exchange system energy complementation passive house according to claim 1, wherein the thickness of the annular phase change material structure outside the U-shaped buried pipe is 5cm, and the phase change temperature is 18-20 ℃; the phase-change material is a composite material of paraffin and expanded graphite, wherein the expanded graphite accounts for 20 percent, and the paraffin accounts for 80 percent; the phase change material is arranged around the buried pipe to store energy in soil, and the energy is released to air in the pipe when the system operates, so that the operation efficiency of the system is increased.

4. The energy-storage-based Trombe wall and soil-air heat exchange system energy complementation passive house according to claim 1, characterized in that the pipeline heat-insulating layer adopted in the system is made of polyurethane, the thickness of the polyurethane is 5cm, and the outer layer of the polyurethane is wrapped by PVC, so that the heat-insulating property of the energy-storage-based Trombe wall and the soil-air heat exchange system is prevented from being influenced by moisture contained in the soil.

5. The energy-storage-based Trombe wall and soil-air heat exchange system energy complementation passive room as claimed in claim 1, wherein the cavity of the Trombe wall is formed by surrounding a phase-change energy-storage outer wall hot water system by a double-layer vacuum glass cover, the thickness of the cavity is 400-500mm, the top of the cavity of the Trombe wall is provided with an air outlet and a corresponding air valve, and the lower part of the cavity of the Trombe wall is connected with the soil-air heat exchange system; the Trombe wall cavity is connected with the indoor environment through an upper air port, a lower air port and a corresponding air valve.

6. The energy-storage-based Trombe wall and soil-air heat exchange system energy complementation passive room as claimed in claim 1, wherein a hot water pipe of the phase-change energy-storage outer wall hot water system is wrapped by a phase-change energy storage plate, a sunny side of the phase-change energy storage plate is coated with a heat absorption material, fins are arranged inside the phase-change energy storage plate, and the hot water pipe is connected with a heat storage water tank or other heat supply systems.

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