CN105569213B - A kind of solar energy phase-change heat storage wall and the ventilating system with solar energy phase-change heat storage wall - Google Patents

Abstract

The present invention provides a kind of solar energy phase-change heat storage wall and the ventilating system with solar energy phase-change heat storage wall, the solar energy phase-change heat storage wall are connected and composed according to this by high-temperature-phase change layer, medium temperature phase change layer and the low-temperature phase change layer of phase transition temperature from high to low.The exterior wall southern side of the ventilating system is made of glass cover-plate, and remainder is made of building enclosure, and the north side top of exterior wall is equipped with outdoor air inlet, and southern side top is equipped with outdoor exhaust outlet；Solar energy phase-change heat storage wall is positioned at outer within the walls simultaneously close to glass cover-plate, and high-temperature-phase change layer sets upper ventilating opening and lower ventilating opening respectively up and down towards south, solar energy phase-change heat storage wall；Hot-water heating system exchanges heat through solar energy phase-change heat storage wall.The present invention can overcome the shortcomings that traditional thermal-arrest wall, strong with heat storage capacity, vdiverse in function, it is easy to operate, and the advantages of do not consume the energy, can play the role of in summer aeration-cooling and heat domestic water, it can be used for heating in the winter time, have a good application prospect.

Description

A solar phase change heat storage wall and a ventilation system with a solar phase change heat storage wall

technical field

The invention relates to a solar energy utilization system, in particular to a solar phase change heat storage wall and a ventilation system with a solar phase change heat storage wall.

Background technique

According to the data of the "2013-2017 China Intelligent Building Industry Market Prospect and Investment Strategic Planning Analysis Report" by Qianzhan Industry Research Institute, the proportion of my country's building energy consumption in total energy consumption has risen to 27.45%. The energy consumption of HVAC and hot water systems accounts for more than 60% of the total energy consumption of buildings. Building energy conservation and emission reduction has become an urgent problem to be solved. my country has a large population and various living forms. Although urbanization is developing rapidly, there are still a large number of independent houses with relatively simple structures and high energy consumption levels in the vast rural areas and some urban areas. Energy-saving and emission-reduction measures for detached houses are still a topic worth studying.

In 2006, the state promulgated the "Renewable Energy Law of the People's Republic of China", advocating the use of renewable energy, increasing energy supply, and achieving sustainable economic and social development. Renewable energy includes solar energy, wind energy, hydro energy, tidal energy, etc. In view of the instability and regional differences of renewable energy such as wind energy and water energy, it is difficult to effectively use and promote them in building energy conservation. However, solar energy is widely distributed and rich in resources, but its utilization forms are still relatively single. The utilization forms in independent houses are mainly Solar collectors provide the main hot water. With the continuous combination of building integration technology and solar energy utilization technology, it is reasonable to believe that solar energy will play an important role in future building energy conservation.

Phase change material (PCM-Phase Change Material) refers to a substance that changes its physical properties and provides latent heat as the temperature changes. The process of changing physical properties is called a phase change process, and the phase change material will absorb or release a large amount of latent heat at this time. Once this material is widely used in human life, it will become the best green carrier for energy conservation and environmental protection, and it has been listed as a national research and development utilization sequence in our country. It has a large heat storage capacity and strong thermal inertia. It can be used as a building material in building structures to stabilize indoor temperature and improve indoor thermal comfort. At the same time, there are many types of phase change materials, and their physical properties are also different. The selection of phase change materials can be made according to the use characteristics of a certain house.

Indoor natural ventilation still depends on heat pressure and wind pressure. Generally, heat pressure and pressure wind pressure are small, and it is difficult to form effective indoor ventilation. Independent houses without central heating have simple wall forms and poor heat storage capacity of building materials. They cannot make full use of the solar radiation during the day in winter to heat the indoor air, and additional energy is required for heating in winter. The appearance of the Trombe wall (heat collecting wall) is a breakthrough in enhancing indoor natural ventilation and heating in winter with zero energy consumption. The opening and closing of different vents can adjust the performance of the heat collecting wall. However, the traditional heat collecting wall has weak heat storage capacity and single function, and can only be used for heating or ventilation and cooling, and is prone to overheating in summer and large temperature fluctuations between day and night in winter.

The Chinese patent with application number 201310062987.5 discloses a natural ventilation system for buildings without energy consumption. The system uses Trombe wall technology, and a wind-induced rotating exhaust cap is installed on the top of the air channel, and a wind-induced rotating air intake cap is installed at the air inlet. , Strengthen indoor natural ventilation. However, the heat collecting wall is an ordinary wall with limited heat storage capacity and single function. Moreover, it is difficult to apply in winter working conditions, and the self-circulation heating of the indoor airflow cannot be achieved, the heating effect is poor, and the indoor temperature is even lowered.

Contents of the invention

The purpose of the present invention is to provide a solar phase change heat storage wall and a ventilation system with a solar phase change heat storage wall, which has multiple functions, simple operation, no energy consumption, and can overcome the shortcomings of the traditional Trombe wall (heat collection wall) .

To achieve the above object, the present invention adopts the following technical solutions:

A solar phase change heat storage wall, the solar phase change heat storage wall is composed of a high temperature phase change layer filled with phase change materials, a medium temperature phase change layer and a low temperature phase change layer connected in sequence, and the high temperature phase change layer, the medium temperature phase change layer The phase change temperature of the phase change material filled in the layer and the low temperature phase change layer decreases sequentially.

The outside of the high-temperature phase-change layer is provided with a liftable outer heat-insulation roller blind, and the outside of the low-temperature phase-change layer is provided with a liftable inner heat-insulation roller blind.

The outer surface of the high-temperature phase-change layer is coated with a heat-absorbing coating.

The phase change material filled in the high temperature phase change layer, medium temperature phase change layer and low temperature phase change layer is an inorganic phase change material or an organic phase change material, and the phase change temperature of the phase change material filled in the high temperature phase change layer is 38 The phase change temperature of the phase change material filled in the medium-temperature phase change layer is 28-32°C, and the phase change temperature of the phase change material filled in the low-temperature phase change layer is 18-22°C.

The exterior wall of the ventilation system is composed of enclosure structure and glass cover, wherein the east, west, north, upper and lower sides of the exterior wall are all composed of enclosure structure, and the south side of the exterior wall is composed of glass cover; and the north The upper part of the enclosure structure on the side is provided with an outdoor air inlet, and the upper part of the glass cover is provided with an outdoor air outlet; the outer wall is equipped with a solar phase change heat storage wall and a hot water system, in which the solar phase change heat storage wall is close to the glass The cover plate is set, and the high-temperature phase change layer of the solar phase change heat storage wall faces south. There is an air passage between the solar phase change heat storage wall and the glass cover plate. There is an upper vent in between, and a lower vent is provided between the solar phase change heat storage wall and the lower enclosure structure; the outdoor air inlet, outdoor exhaust, upper vent and lower vent are equipped with The closed windshield; the hot water system passes through the low temperature phase change layer of the solar phase change heat storage wall for heat exchange.

The hot water system is composed of a water tank, a water separator, a water collector, a water outlet valve and several hot water collecting pipes, wherein the water tank is arranged above the upper enclosure structure and communicated with the water separator, each The two ends of the water collecting pipes are respectively connected with the water separator and the water collector. All the water collecting pipes are vertically buried in the low-temperature phase change layer of the solar phase change heat storage wall. The device is horizontally embedded in the low-temperature phase change layer of the solar phase change heat storage wall, and the water outlet valve is located outside the solar phase change heat storage wall and communicated with the water collector.

The material of the water separator, the water collecting pipe and the water collector is copper.

The enclosure structure is a hollow brick wall.

The glass cover plate is double-layer hollow glass.

Compared with prior art, the beneficial effect of the present invention is:

The solar phase change heat storage wall provided by the present invention is provided with three phase change layers with different phase change temperatures, and when it is constructed and used, it is set so that the phase change temperatures of the phase change layers decrease sequentially from south to north. In this way, when storing heat, the southernmost high-temperature phase-change layer absorbs solar radiation, and gradually conducts heat to the medium-temperature phase-change layer and the low-temperature phase-change layer, which can increase the heat storage capacity of the heat storage wall; In the thermal process, the low-temperature phase-change layer heats the indoor temperature, and heats the cold water in the hot water system, and the heat in the medium-temperature phase-change layer and the high-temperature phase-change layer is sequentially replenished into the low-temperature phase-change layer, which can prolong Heat release time, and overcome the instability of solar energy.

Further, in the solar phase change heat storage wall provided by the present invention, the outer surface of the high temperature phase change layer is coated with a heat absorbing coating, which can enhance its absorption and utilization of solar energy. Moreover, a liftable outer heat-insulation roller blind is set outside the high-temperature phase-change layer. When the outer heat-insulation roller blind is lowered to cover the high-temperature phase-change layer, it can prevent the high-temperature phase-change layer from absorbing solar radiation, and can block the high-temperature phase-change layer. Heat release to the external environment. At the same time, a liftable inner heat-insulating roller blind is set outside the low-temperature phase-change layer. When the inner heat-insulation roller blind is lowered to cover the low-temperature phase-change layer, it can prevent the low-temperature phase-change layer from releasing heat to the external environment.

The ventilation system provided by the invention with a solar phase-change heat storage wall can overcome the shortcomings of the traditional Trombe wall (heat collection wall), and has strong heat storage capacity, multiple functions, simple operation, and no energy consumption. In summer, it can ventilate and cool down and heat domestic water, and in winter it can be used for heating, which overcomes the problem that traditional solar heat collection and ventilation systems are difficult to apply in winter conditions. The ventilation system with solar phase change heat storage wall provided by the present invention, in summer, uses solar phase change heat storage wall to absorb solar radiation during the day, strengthens indoor natural ventilation and heats domestic water, and uses solar energy phase change heat storage wall at night to absorb solar radiation The stored heat can continue to strengthen indoor natural ventilation and heat domestic water, so it can improve air quality and reduce building energy consumption; Indoor heating, the heating effect is good, and the heat stored in the solar phase change heat storage wall can continue to make the indoor air circulation self-circulating heating at night, and the indoor heating is good, so the indoor heat load can be reduced. Therefore, the ventilation system with solar phase change heat storage wall provided by the present invention can effectively overcome the problems of single function of traditional solar heat collection wall, overheating during the day in summer, overcooling at night in winter, and large temperature fluctuations between day and night, and has a good application prospect.

Description of drawings

Fig. 1 is a schematic structural diagram of a ventilation system provided by the present invention with a solar phase change heat storage wall.

Fig. 2 is a structural schematic diagram of a hot water system in a ventilation system with a solar phase change heat storage wall provided by the present invention.

Fig. 3 is a schematic diagram of the daytime working mode in winter of the ventilation system provided by the present invention with a solar phase change heat storage wall.

Fig. 4 is a schematic diagram of the winter night working mode of the ventilation system with the solar phase change heat storage wall provided by the present invention.

Fig. 5 is a schematic diagram of the daytime working mode in summer of the ventilation system provided by the present invention with a solar phase change heat storage wall.

Fig. 6 is a schematic diagram of the summer night working mode of the ventilation system with the solar phase change heat storage wall provided by the present invention.

Among them: 1 is the water tank, 2 is the upper air vent, 3 is the outdoor air outlet, 4 is the water separator, 5 is the glass cover, 6 is the external heat insulation roller blind, 7 is the air channel, 8 is the water collector, 9 is the lower air vent, 10 is the high temperature phase change layer, 11 is the medium temperature phase change layer, 12 is the hot water pipe, 13 is the low temperature phase change layer, 14 is the inner heat insulation shutter, 15 is the water outlet valve, 16 is the outdoor Air inlet, 17 is enclosure structure.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The general idea of the present invention is: based on the principle of the trombe wall, a solar phase change heat storage wall with multi-level phase transition points is used to replace the traditional heavy wall, so as to enrich the functions of the heat collection wall and improve the performance of the wall. The present invention provides A solar phase change heat storage wall and a ventilation system with a solar phase change heat storage wall can achieve the functions of using solar energy to strengthen indoor natural ventilation and cooling in summer and heating in winter. In order to describe the technical content, structure and purpose of the present invention in detail, the following will be specifically introduced in conjunction with the accompanying drawings.

It can be seen from Fig. 1 that the solar energy phase change heat storage wall provided by the present invention is composed of a high temperature phase change layer 10, a medium temperature phase change layer 11 and a low temperature phase change layer 13 with phase change temperature from high to low. The outer side of the phase change layer 10 is provided with a movable outer heat insulation roller blind 6 , and the outer side of the low temperature phase change layer 13 is provided with a movable inner heat insulation roller blind 14 . The outer surface of the high-temperature phase-change layer 10 is coated with a black heat-absorbing coating, and the inside is filled with phase-change microcapsules. The phase-change material can be an inorganic phase-change material or an organic phase-change material, and the phase-change point is about 40°C. The medium-temperature phase-change layer 11 is filled with phase-change microcapsules, and the phase-change material can be an inorganic phase-change material or an organic phase-change material, and the phase-change temperature is about 30°C. The low-temperature phase change layer 13 is filled with phase change microcapsules, and the phase change material can be inorganic phase change material or organic phase change material, and the phase change point is about 20°C.

When building and using the solar phase change heat storage wall in a house, make the high temperature phase change layer 10 face south, and the low temperature phase change layer 13 face north, and set the upper vent 2 on the upper part of the solar phase change heat storage wall, and the lower part Set lower vent 9.

As can be seen from Fig. 1 and Fig. 2, the ventilation system with the solar phase change heat storage wall provided by the present invention is specifically structured as follows: an enclosure structure 17, a glass cover plate 5, a solar phase change heat storage wall, and a hot water system and vents. The outer wall of the ventilation system is composed of an enclosure structure 17 and a glass cover plate 5, wherein the enclosure structure 17 is a hollow brick wall, and the glass cover plate 5 is double-layer hollow glass. The east, west, north, upper and lower sides of the outer wall are all formed by enclosure structures 17, and the south side of the outer wall is formed by glass cover plates 5. A solar phase change heat storage wall and a hot water system are installed inside the outer wall, and vents are opened on the outer wall. The vents include upper vents 2, lower vents 9, outdoor air inlets 16 and outdoor discharge ports 3, and outdoor air inlets 16, outdoor air exhaust ports 3, upper vents 2 and lower vents 9 are equipped with and closed wind deflector. Specifically, the upper part of the enclosure structure 17 on the north side is provided with an outdoor air inlet 16 , and the upper part of the glass cover plate 5 on the south side is provided with an outdoor air outlet 3 . The solar phase-change heat storage wall is set close to the glass cover 5 , and the high-temperature phase-change layer 10 faces south, and an air channel 7 is left between the solar phase-change heat storage wall and the glass cover 5 . An upper vent 2 is provided between the solar phase-change thermal storage wall and the upper enclosure structure 17 , and a lower vent 9 is provided between the solar phase-change thermal storage wall and the lower enclosure structure 17 . The hot water system is composed of a water tank 1, a water separator 4, a heat collecting pipe 12, a water collector 8, and a water outlet valve 15 connected in sequence. The hot water system is arranged in the same way, including several heat collecting pipes 12, and the two ends of each collecting water pipe 12 communicate with the water distributor 4 and the water collector 8 respectively. The hot water pipe 12 is vertically buried in the low temperature phase change layer 13 of the solar phase change heat storage wall, and the water separator 4 and the water collector 8 are horizontally buried in the low temperature phase change layer 13 of the solar phase change heat storage wall Inside, the water separator 4, the water collector 8 and the water collecting pipe 12 are in close contact with the phase change microcapsules in the low temperature phase change layer 13. The water tank 1 is arranged above the upper enclosure structure 17 and communicates with the water separator 4 through a pipeline. The water outlet valve 15 is located outside the solar phase change heat storage wall, and communicates with the water collector 8 through a pipeline. The water separator 4, the hot water pipe 12, and the water collector 8 are made of high thermal conductivity copper.

As can be seen from Figure 2, the working process of the hot water system is: inject a certain amount of cold water into the water tank 1 through the domestic tap water system, and the water flows into the water separator 4 under the action of gravity, and then flows into the water collecting pipes from the water separator 4 In 12 , the hot water pipe 12 absorbs heat from the solar phase change heat storage wall, and the cold water in the hot water pipe 12 is heated and collected in the water collector 8 . When the house needs to use domestic hot water, the water outlet valve 15 is opened to release the hot water. The hot water system is out of service in winter.

The working modes of the ventilation system with solar phase change heat storage wall provided by the present invention under four typical working conditions in winter daytime, winter nighttime, summer daytime and summer nighttime are described below with reference to the accompanying drawings.

It can be seen from Fig. 3 that the working mode of the ventilation system provided by the present invention with the solar phase change heat storage wall during the daytime in winter is: close the outdoor air outlet 3 and the outdoor air inlet 16, and open the upper air outlet 2 and the lower air outlet 9 , raise the outer heat-insulating roller blind 6 and the inner heat-insulating roller blind 14. The hot water system is out of service. The solar radiation reaches the solar phase change heat storage wall after passing through the glass cover plate 5, and is absorbed by the solar phase change heat storage wall, and the solar phase change heat storage wall is heated, and the phase change material in each phase change layer in the solar phase change heat storage wall Reach the respective phase change point and melt to carry out phase change heat storage. The glass cover plate 5 and the air layer inhibit the radiant heat absorbed by the solar phase-change heat storage wall from dissipating outward, and the air in the air channel 7 receives solar radiation, and produces convective heat exchange with the solar phase-change heat storage wall, and the hot air rises And enter the room by the upper vent 2. The cold air in the lower part of the room is sucked in the air channel 7 through the lower vent 9. The solar phase change heat storage wall releases heat to the room at the same time, heating the indoor air. Therefore, the indoor air forms a thermal circulation flow, which effectively improves the indoor thermal comfort.

It can be seen from Fig. 4 that the winter night working mode of the ventilation system with solar phase change heat storage wall provided by the present invention is: close all vents, raise the inner heat insulation roller blind 14, and lower the outer heat insulation roller blind 6. The hot water system is out of service. Each phase change layer of the solar phase change heat storage wall gradually releases the heat stored during the day, the air close to the solar phase change heat storage wall is heated, and the heated airflow is convected with the indoor airflow to heat the room. Due to the large heat storage capacity and strong thermal inertia of phase change materials, it can provide heating for a long time at night. Simultaneously, the outer thermal insulation roller blind 6 prevents the heat of the solar phase change heat storage wall from dissipating to the outdoor side.

It can be seen from Fig. 5 that the working mode of the ventilation system provided by the present invention with a solar phase change heat storage wall in summer is: open the outdoor air inlet 16, the outdoor air exhaust port 3 and the lower air outlet 9, and close the upper air outlet 2 , raise the outer thermal insulation roller shutter 6, lower the inner thermal insulation roller shutter 14, and the hot water system is in normal use. The solar radiation is absorbed by the solar phase change heat storage wall, the solar phase change heat storage wall is heated, and the phase change materials in each phase change layer of the solar phase change heat storage wall reach their respective phase change points and melt for phase change heat storage. The heat collecting pipes 12 buried in the solar phase change heat storage wall absorb heat to generate hot water, reducing the heat of the solar phase change heat storage wall. The air in the air channel 7 rises due to the heat dissipation of the solar radiation and the solar phase change heat storage wall, and is discharged through the outdoor air outlet 3 . The outdoor air is sucked into the room through the outdoor air inlet 16, mixed with the indoor air, and then sucked into the air channel 7 through the lower vent 9. Therefore, good natural ventilation is formed indoors, which effectively reduces the indoor temperature.

It can be seen from Fig. 6 that the summer night working mode of the ventilation system with the solar phase change heat storage wall provided by the present invention is: the same as the summer daytime operation mode, that is, open the outdoor air inlet 16, the outdoor air outlet 3 and the lower ventilation. Port 9, close the upper ventilation port 2, raise the outer thermal insulation roller shutter 6, lower the inner thermal insulation roller shutter 14, and the hot water system is in normal use. The phase change layers of the solar phase change heat storage wall gradually release the heat stored during the day, and the air in the air channel 7 rises due to the heat dissipation of the solar phase change heat storage wall, and is discharged through the outdoor air outlet 3 . Outdoor low-temperature air is sucked into the room through the outdoor air inlet 16, mixed with indoor air, and then sucked into the air passage 7 through the lower vent 9. Because the phase change material in the solar phase change heat storage wall has a large heat storage capacity and strong thermal inertia, it can dissipate heat to the air channel 7 for a long time, and it can still strengthen indoor natural ventilation at night and supply domestic hot water.

The specific content described above in conjunction with the accompanying drawings is only schematic and does not constitute a limit to the scope of protection of the present invention. Researchers in the field provide a solar phase change heat storage wall and a solar phase change heat storage wall provided by the present invention. On the basis of the ventilation system of the present invention, various modifications or deformations that do not require creative work are still within the protection scope of the present invention.

Claims (9)

1. A kind of 1. solar energy phase-change heat storage wall, it is characterised in that：The solar energy phase-change heat storage wall is by the height filled with phase-change material Warm phase change layer (10), medium temperature phase change layer (11) and low-temperature phase change layer (13) are sequentially connected composition, and high-temperature-phase change layer from outside to inside (10), the phase transition temperature of medium temperature phase change layer (11) and the phase-change material of the interior filling of low-temperature phase change layer (13) reduces successively.
2. 2. solar energy phase-change heat storage wall according to claim 1, it is characterised in that：Outside the high-temperature-phase change layer (10) Side is equipped with the outer thermal-insulated blind (6) that can be lifted, and the outside of low-temperature phase change layer (13) is equipped with the interior thermal-insulated blind that can be lifted (14)。
3. 3. solar energy phase-change heat storage wall according to claim 1, it is characterised in that：Outside the high-temperature-phase change layer (10) Surface scribbles heat absorbing coating.
4. 4. the solar energy phase-change heat storage wall according to any one in claim 1-3, it is characterised in that：The high-temperature-phase The phase-change material of filling is inorganic phase-changing material or organic phase in change layer (10), medium temperature phase change layer (11) and low-temperature phase change layer (13) Become material, the phase transition temperature for the phase-change material filled in high-temperature-phase change layer (10) is 38~42 DEG C, is filled out in medium temperature phase change layer (11) The phase transition temperature of the phase-change material filled is 28~32 DEG C, the phase transition temperature of the phase-change material of filling is 18 in low-temperature phase change layer (13) ~22 DEG C.
5. 5. the ventilating system with the solar energy phase-change heat storage wall described in any one in claim 1-4, it is characterised in that：Should The exterior wall of ventilating system is made of building enclosure (17) and glass cover-plate (5), wherein the east of exterior wall, west, north, upper and lower side all by Building enclosure (17) is formed, and the southern side of exterior wall is made of glass cover-plate (5)；And the top of the building enclosure (17) of north side is equipped with room External air inlet port (16), the top of glass cover-plate (5) are equipped with outdoor exhaust outlet (3)；Outside within the walls be equipped with solar energy phase-change heat storage wall and Hot-water heating system, wherein solar energy phase-change heat storage wall are set close to glass cover-plate (5), and the high-temperature phase-change of solar energy phase-change heat storage wall Layer (10) leaves air duct (7), solar energy phase-change heat storage wall towards south between solar energy phase-change heat storage wall and glass cover-plate (5) The building enclosure (17) of upper ventilating opening (2), solar energy phase-change heat storage wall and downside is equipped between the building enclosure (17) of upside Between be equipped with lower ventilating opening (9)；On outdoor air inlet (16), outdoor exhaust outlet (3), upper ventilating opening (2) and lower ventilating opening (9) Equipped with the wind shield that can be opened and closed；The low-temperature phase change layer (13) of hot-water heating system through solar energy phase-change heat storage wall is changed Heat.
6. 6. the ventilating system according to claim 5 with solar energy phase-change heat storage wall, it is characterised in that：The hot water System is made of water tank (1), water knockout drum (4), water collector (8), outlet valve (15) and some collection hot-water lines (12), wherein water tank (1) it is arranged on the top of the building enclosure (17) of upside and is connected with water knockout drum (4), the both ends point of every collection hot-water line (12) It is not connected with water knockout drum (4) and water collector (8), all collection hot-water line (12) vertical burying are overlying on solar energy phase-change heat storage wall Low-temperature phase change layer (13) in, water knockout drum (4) and water collector (8) level bury the low temperature phase change for being overlying on solar energy phase-change heat storage wall In layer (13), outlet valve (15) is located at the outside of solar energy phase-change heat storage wall and is connected with water collector (8).
7. 7. the ventilating system according to claim 6 with solar energy phase-change heat storage wall, it is characterised in that：Described divides water Device (4), integrate the material of hot-water line (12) and water collector (8) as copper.
8. 8. the ventilating system according to claim 5 with solar energy phase-change heat storage wall, it is characterised in that：Described goes along with sb. to guard him Structure (17) is hollow brick wall.
9. 9. the ventilating system according to claim 5 with solar energy phase-change heat storage wall, it is characterised in that：The glass Cover board (5) is double layer glass.