Passive building envelope system with dehumidification, cooling and heat collection functions and application thereof

Abstract

The application discloses a passive building envelope system with dehumidification, cooling and heat collection functions and application, which comprises a heat storage wall, a glass layer, a moisture absorption and release layer, a circulating system and a controller for controlling the circulating system; the circulating system comprises an outer ventilation layer, an inner ventilation layer and an exhaust device; the exhaust device comprises a first upper ventilation pipe, a first lower ventilation pipe, an upper ventilation opening, a lower ventilation opening and a second ventilation pipe, and fans are arranged in the first upper ventilation pipe, the first lower ventilation pipe, the upper ventilation opening, the lower ventilation opening and the second ventilation pipe; the fans are controlled by the controller; the winter and summer ventilation modes are opened; winter humidification and heat collection and summer dehumidification and cooling are realized; the system can realize multiple circulation of air, self-adsorption of indoor humidity, reduction of indoor latent heat load and sensible heat load and reduction of energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building energy-saving technology, in particular to a passive building envelope system with dehumidification, cooling and heat collection functions and application. BACKGROUND

[0002] In the field of building, the energy consumption of refrigeration, heating and ventilation system accounts for a large part of the total energy consumption. When the high-humidity outdoor air enters the indoor, the treatment of indoor latent heat load is a difficult task for the refrigeration, heating and ventilation system. The existing air conditioning system generally uses a heat and humidity coupling method, which causes waste of energy utilization, limits the use of natural cold source and the improvement of refrigeration equipment efficiency. The air after condensation dehumidification meets the humidity requirement, but the temperature is too low, and the air needs to be heated to meet the requirement of supply air temperature, which causes further waste and loss of energy. The current relevant building energy-saving design standard in China usually uses the heat transfer coefficient and air tightness of building envelope structure to evaluate energy saving, but ignores the influence of wall moisture absorption and desorption and solar heat utilization system on building energy consumption. Therefore, it is necessary to fully utilize solar energy, timely process moisture, separate latent heat and sensible heat to reduce cooling and heating load, and achieve the purpose of reducing building energy consumption.

[0003] Patent CN201610405307.9 discloses a Tranebuk wall suitable for subtropical regions, which comprises a curtain wall body made of thin film solar cell components and a driveable louver as a reflective heat insulation wall. The curtain wall body and the louver are spaced apart, the space between the curtain wall body and the louver is an air flow channel, the upper and lower of the louver are respectively provided with indoor upper and lower ventilation openings, the upper ventilation opening is provided with an upper baffle, the lower ventilation opening is provided with a lower baffle, the upper of the curtain wall body is provided with an outdoor ventilation opening, and a fan is installed at the ventilation opening. The curtain wall has heat collection function, solar power generation function, can reduce heat load, has good light transmission and lighting property, does not block the view, has diversified functions and wide application field. However, the patent cannot process indoor moisture, the latent heat load is high, and the energy consumption is large.

[0004] The patent CN202010669557.X discloses a self-adjusting photovoltaic heat storage wall system with dehumidification and purification function, which belongs to the field of energy utilization technology. It includes a heat storage wall with upper air duct, middle air duct and lower air duct. The outer part of the heat storage wall is provided with a glass wall. The glass wall between the upper air duct and the middle air duct and the heat storage wall is filled with adsorbent material. The glass wall below the middle air duct and the heat storage wall form an air layer. The middle part of the middle air duct is provided with a ventilation baffle, which can effectively separate the middle air duct into an upper flow channel and a lower flow channel. The upper air duct, the middle air duct and the lower air duct of the through glass wall are provided with baffles at both ends of the port. The inner surface of the glass wall is provided with a PV layer composed of a plurality of solar cell pieces laid in series. The invention has three working modes of summer adsorption, winter adsorption and desorption. Through the combination of different ventilation port baffles, it can be applied to various working conditions. However, the circulation mode of this patent is relatively single, the dehumidification effect is poor, and the energy consumption is large. SUMMARY

[0005] In view of the above-mentioned defects of the prior art, the present application provides a passive building envelope system with dehumidification, cooling and heat collection functions, which avoids high indoor humidity latent heat load, high energy consumption, single circulation mode and low circulation efficiency.

[0006] To solve the above technical problems, the technical solution adopted by the present application is a passive building envelope system with dehumidification, cooling and heat collection functions, which includes a heat storage wall between two walls, a glass layer on the outside of the heat storage wall, a moisture adsorption and release layer on the inside of the heat storage wall for adsorbing and releasing moisture, a circulation system for realizing indoor air circulation, the circulation system including an outer ventilation layer formed by the glass layer and the heat storage wall, an inner ventilation layer formed by the heat storage wall and the moisture adsorption and release layer, and an exhaust device for realizing indoor and outdoor ventilation layer circulation and indoor and inner ventilation layer circulation; the exhaust device includes a first upper ventilation pipe and a first lower ventilation pipe connected between the heat storage wall and the moisture adsorption and release layer, and an upper ventilation port and a lower ventilation port provided on the moisture adsorption and release layer; a fan is provided in the first upper ventilation pipe, the first lower ventilation pipe, the upper ventilation port and the lower ventilation port, and a temperature sensor is provided in the inner ventilation layer and the outer ventilation layer; a controller is further included for controlling the circulation system to realize multiple ventilation modes; the temperature sensor sends signals to the controller, and the controller sends signals to the fan to control the fan to operate and open the winter and summer ventilation modes to realize winter humidification and heat collection and summer dehumidification and cooling.

[0007] Further, the moisture adsorption and release layer is made of paper cellulose material.

[0008] Furthermore, in the winter daytime ventilation mode, the exhaust device includes a first upper ventilation pipe, a first lower ventilation pipe, an upper ventilation opening, and a lower ventilation opening. The controller controls the fan to rotate. The outer ventilation layer forms an internal and external circulation channel with the interior, realizing the internal and external circulation of air between the interior and the outer ventilation layer. The inner ventilation layer forms an inner circulation channel with the interior, realizing the internal and internal circulation of air between the interior and the inner ventilation layer. The internal and internal circulation and the internal and external circulation work together to form a heat collection dual circulation mode.

[0009] Furthermore, in the ventilation mode at night in summer, the exhaust device includes a first upper ventilation pipe and a first lower ventilation pipe. The controller controls the fan to rotate. The outer ventilation layer and the indoor space form an internal and external circulation channel, realizing the internal and external circulation of air between the indoor and outer ventilation layers. At the same time, the moisture absorption and desiccation layer autonomously absorbs indoor moisture into the inner ventilation layer and then exhausts dry air into the room, forming an autonomous dehumidification cycle. The internal and external circulation and the autonomous dehumidification cycle work together to form a dual circulation mode of dehumidification and cooling.

[0010] A passive building envelope system with dehumidification, cooling, and heat collection functions includes a heat storage wall between two walls, a glass layer on the outside of the heat storage wall, a moisture absorption and release layer on the inside of the heat storage wall for absorbing and releasing moisture, and a circulation system for circulating air between the inside and outside of the building. The circulation system includes an inner ventilation layer formed by the heat storage wall and the moisture absorption and release layer, a second ventilation duct connecting the heat storage wall and the glass layer, and a lower ventilation opening on the moisture absorption and release layer. A temperature sensor is installed in the inner ventilation layer, and fans are installed in the second ventilation duct and the lower ventilation opening. The system also includes a controller for controlling the circulation system to achieve a summer daytime ventilation mode. The temperature sensor sends a signal to the controller, which in turn sends a signal to the fan to control its operation. The inner ventilation layer forms an external circulation channel with the outside, enabling air to circulate from the inside to the outside. Simultaneously, the moisture absorption and release layer autonomously absorbs indoor moisture into the inner ventilation layer, and the moisture is discharged to the outside with the external circulation, achieving dehumidification and cooling during the summer daytime.

[0011] Furthermore, a humidity sensor is installed indoors, and the humidity sensor sends a signal to the controller.

[0012] Application of passive building envelope systems with dehumidification, cooling and heat collection functions in building structures.

[0013] Furthermore, this passive building envelope system can be applied to the entire wall or part of the wall of a building.

[0014] Furthermore, this passive building envelope system can be applied to the entire roof or part of the roof.

[0015] The beneficial effects of this passive building envelope system with dehumidification, cooling, and heat collection functions are as follows: The moisture-absorbing layer is made of paper cellulose material, which, through its porous structure, can autonomously absorb indoor moisture while also providing insulation; the internal and external ventilation layers enable dual air circulation, utilizing solar energy collection in winter to reduce sensible heat load, improving indoor air circulation efficiency, and effectively reducing building energy consumption; during the day in summer, the moisture-absorbing layer absorbs indoor moisture, and the hot, humid indoor air is exhausted to the outside through the internal ventilation layer, dehumidifying and cooling to reduce sensible and latent heat loads, significantly reducing building energy consumption; at night in summer, the external ventilation layer radiates cooling to reduce sensible heat load, and indoor air circulates through the external ventilation layer and indoors to achieve cooling, while the moisture-absorbing layer autonomously absorbs moisture to reduce indoor humidity, avoiding the direct introduction of outdoor air, which would cause increased indoor humidity, increased latent heat load, and increased building energy consumption. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the winter daytime mode of the present invention;

[0018] Figure 3 This is a schematic diagram of the summer night mode of the present invention;

[0019] Figure 4 This is a schematic diagram of the summer daytime mode of the present invention;

[0020] Figure 5 This is a schematic diagram of air circulation in the winter daytime mode of the present invention;

[0021] Figure 6 This is a schematic diagram of air circulation in the summer night mode of the present invention;

[0022] Figure 7 This is a schematic diagram illustrating the application of the present invention on a wall.

[0023] Figure 8 This is a schematic diagram illustrating the application of the present invention on a wall.

[0024] Figure 9 This is a schematic diagram illustrating the application of the present invention on a roof.

[0025] Figure 10 This is a schematic diagram illustrating the application of the present invention on a roof.

[0026] In the diagram, 1 is the moisture absorption / desorption layer; 2 is the inner ventilation layer; 3 is the heat storage wall; 4 is the outer ventilation layer; 5 is the glass layer; 6 is the fan; 7 is the fan; 8 is the fan; 9 is the fan; 10 is the fan; 11 is the indoor unit; 12 is the first upper ventilation duct; 13 is the first lower ventilation duct; 14 is the upper ventilation opening; 15 is the lower ventilation opening; 16 is the second ventilation duct; 17 is the internal and external circulation; 18 is the internal internal circulation; 19 is the dehumidification self-circulation; 20 is the external circulation. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1-7 As shown, a passive building envelope system with dehumidification, cooling, and heat collection functions includes a heat storage wall 3 located between two walls, a glass layer 5 located on the outside of the heat storage wall 3, and a moisture absorption and release layer 1 located on the inside of the heat storage wall 3 for absorbing and releasing moisture. The moisture absorption and release layer 1 can be made of paper cellulose material, which has a porous structure and can be used to autonomously absorb moisture in the room 11, as well as for heat preservation. It also includes a circulation system to realize indoor air circulation. The circulation system includes an external ventilation layer 4 formed by the glass layer 5 and the heat storage wall, an internal ventilation layer 2 formed by the heat storage wall 3 and the moisture absorption and release layer 1, and an exhaust system to realize the circulation of indoor and external ventilation layers 4 and indoor and internal ventilation layers 2. The device includes a first upper ventilation pipe 12 and a first lower ventilation pipe 13 connecting the heat storage wall 3 to the moisture absorption and desiccation layer 1, and an upper ventilation port 14 and a lower ventilation port 15 located on the moisture absorption and desiccation layer. Fans are installed in the first upper ventilation pipe 12, the first lower ventilation pipe 13, the upper ventilation port 14, and the lower ventilation port 15. Temperature sensors are installed in the inner ventilation layer 2 and the outer ventilation layer 4. The device also includes a controller for controlling the circulation system to realize multiple ventilation modes. The controller can be a PLC controller. The temperature sensor sends a signal to the controller, and the controller sends a signal to the fan to control the fan to run and activate the winter and summer ventilation modes to realize humidification and heat collection in winter and dehumidification and cooling in summer.

[0029] In the winter daytime ventilation mode, the exhaust system includes a first upper ventilation duct 12, a first lower ventilation duct 13, an upper ventilation opening 14, and a lower ventilation opening 15. The controller controls the rotation of fans 6, 7, 8, and 9. The outer ventilation layer 4 and the interior 11 form an internal and external circulation channel, achieving internal and external air circulation 17 between the interior 11 and the outer ventilation layer 4. The inner ventilation layer 2 and the interior 11 form an internal circulation channel, achieving internal and external air circulation 18 between the interior 11 and the inner ventilation layer 2. This can assist in the internal and external circulation 17, enhance air circulation, and utilize the heat within the inner ventilation layer 2 and the outer ventilation layer 4. Utilization efficiency; at the same time, since the moisture absorption and desiccation layer 1 is made of porous paper cellulose material, some of the cold air in the room 11 will autonomously pass through the moisture absorption and desiccation layer 1 and enter the inner ventilation layer 2 to complete heat exchange, while the relatively warm air passes through the moisture absorption and desiccation layer 1 and returns to the room, forming a dehumidification autonomous circulation 19. The inner circulation 18, the dehumidification autonomous circulation 19 and the inner and outer circulation 17 work together. The so-called synergistic effect is that the three circulations of inner and outer circulation 17, inner and outer circulation 18 and dehumidification autonomous circulation 19 form a heat collection multi-circulation mode, which are interconnected and mutually promote each other, greatly improving the indoor air circulation efficiency and promoting the rise of indoor temperature 11.

[0030] In the ventilation mode at night during summer, the exhaust device includes a first upper ventilation duct 12 and a first lower ventilation duct 13. The controller controls the rotation of fans 6 and 7. The outer ventilation layer 4 and the indoor 11 form an internal and external circulation channel, realizing the internal and external circulation 17 of air flowing between the indoor 11 and the outer ventilation layer 4. At the same time, the moisture absorption and desiccation layer 1 autonomously absorbs the moisture in the indoor 11 into the inner ventilation layer 2 and then exhausts the dry air into the indoor 11, forming a dehumidification autonomous circulation 19. The internal and external circulation 17 and the dehumidification autonomous circulation 19 work together. The so-called synergistic effect is that the two circulations, internal and external circulation 17 and dehumidification autonomous circulation 19, form a dehumidification and cooling dual circulation mode, which are interconnected and mutually promote each other, greatly improving the indoor air circulation efficiency, reducing the latent heat load of the indoor 11, reducing energy consumption, and also reducing indoor humidity, making life more comfortable.

[0031] A passive building envelope system with dehumidification, cooling, and heat collection functions includes a heat storage wall 3 located between two walls, a glass layer 5 located on the outside of the heat storage wall 3, and a moisture absorption and release layer 1 located on the inside of the heat storage wall 3 for absorbing and releasing moisture. The moisture absorption and release layer 1 can be made of paper cellulose material. It also includes a circulation system for circulating air between the interior and exterior of the building. The circulation system includes an inner ventilation layer 2 formed by the heat storage wall 3 and the moisture absorption and release layer 1, a second ventilation duct 16 connecting the heat storage wall 3 and the glass layer 5, and a lower ventilation opening 15 located on the moisture absorption and release layer 1. A temperature sensor is installed in the inner ventilation layer 2, and fans are installed in the second ventilation duct 16 and the lower ventilation opening 15. The system also includes a controller for controlling the circulation system to achieve a summer daytime ventilation mode. The temperature sensor sends a signal to the controller, and the controller... A signal is sent to the fans, controlling fans 8 and 10 to rotate. The inner ventilation layer 2 forms an external circulation channel with the outside, realizing the external circulation 20 that exhausts air from the indoor 11 to the outside. At the same time, the moisture absorption and desiccation layer 1 autonomously absorbs indoor moisture into the inner ventilation layer 2, and the moisture is exhausted to the outside with the external circulation 20. Some dry air is discharged into the indoor 11, forming a dehumidification autonomous circulation 19, which assists the external circulation 20 in dehumidification and cooling, realizing dehumidification and cooling during the day in summer. The external circulation 20 and the dehumidification autonomous circulation 19 work together. The so-called synergistic effect is that the two circulations, external circulation 20 and dehumidification autonomous circulation 19, form a dual circulation mode of dehumidification and cooling, which are interconnected and mutually promote each other, greatly improving the indoor air circulation efficiency, reducing the latent heat load of the indoor 11, reducing energy consumption, and also reducing indoor humidity, making life more comfortable.

[0032] A humidity sensor can be installed indoors, and the humidity sensor sends a signal to the controller to control the operation of various modes.

[0033] When the building is a tall building, the passive building envelope system can be set as a whole wall or a part of the wall. When the building is a bungalow or a low-rise detached house, it can be applied to the whole roof or part of the roof. The size of the passive building envelope system can be set according to actual needs.

[0034] The method of using this invention is as follows:

[0035] Winter daytime ventilation mode: Set the temperature sensors in the inner ventilation layer 2 and outer ventilation layer 4 to 24℃. The colder the weather, the more humid the room becomes because the low temperature prevents the evaporation of moisture. In cold weather, moisture in the atmosphere condenses into water droplets, creating dampness in various corners of the room. In winter, most indoor moisture is released by human activity, so the absolute humidity level is not significantly different between the north and south. Even in the north without heating, it will still be damp and cold, with condensation on the windows and clothes not drying. Therefore, dehumidification is necessary indoors in winter. When the temperature is above 2℃... At 4℃, the temperature sensor sends a signal to the controller, which then controls fans 6, 7, 8, and 9 to rotate. Cooler indoor air (11) enters the outer ventilation layer (4) through fan 7. Due to sunlight, the air temperature in the outer ventilation layer (4) is higher. The cooler indoor air (11) completes heat exchange within the outer ventilation layer (4) and then circulates back into the room via fan 6, forming an internal and external circulation (17) to increase the indoor temperature. Simultaneously, cooler indoor air (11) enters the inner ventilation layer (2) through fan 8. The heat storage wall (3) releases heat into the inner ventilation layer (2), increasing the temperature within the inner ventilation layer (2). In the higher-temperature zone, the cooler air in the inner ventilation layer 2 undergoes heat exchange before being circulated back into the room by the fan 9, forming an internal circulation 18, which further increases the indoor temperature. Simultaneously, because the moisture absorption layer 1 is made of porous paper cellulose material, the cool, humid air in the inner ventilation layer 2 autonomously passes through it to complete heat exchange and moisture adsorption. The relatively warmer air then passes through the moisture absorption layer 1 and returns to the room, forming a self-regulating dehumidification circulation 19, further increasing the indoor temperature and reducing the indoor humidity. These three circulations work simultaneously, accelerating the circulation efficiency. This allows for the recovery of heat from the inner ventilation layer 2 and the outer ventilation layer 4. The circulation of hot air into the room reduces the sensible heat load and energy consumption. Due to the structure of the glass layer 5, the heat storage wall 3, and the moisture absorption and release layer 1, the inner ventilation layer 2 and the outer ventilation layer 4 have good heat preservation effects and higher air humidity. When working, the high humidity air is circulated into the room, which greatly improves the problem of dryness in the room during winter and makes it more comfortable. The use of multiple circulation modes, including internal circulation 18, dehumidification self-circulation 19, and internal and external circulation 17, greatly improves the circulation efficiency and reduces energy consumption.

[0036] Summer nighttime ventilation mode: The temperature sensor inside the external ventilation layer 4 is set to 22℃. Due to radiative cooling, the temperature of the external ventilation layer 4 will drop. When the temperature is below 22℃, the fan 7 will bring the high-temperature indoor air into the external ventilation layer 4 for heat exchange, and the lower-temperature air will return to the room, forming an internal and external circulation 17 to lower the temperature. At the same time, since the moisture absorption and desiccation layer 1 is made of porous paper cellulose material, it can autonomously absorb the moisture in the room 11 and then exhaust the dry air into the room 11, forming a dehumidification autonomous circulation 19, which reduces indoor humidity and reduces latent heat load. The internal and external circulation 17 and the dehumidification autonomous circulation 19 work together, and when combined with the indoor air conditioning, energy consumption can be greatly reduced. Compared with directly introducing outdoor air, the latent heat load is greatly reduced.

[0037] Summer daytime ventilation mode: The temperature sensor inside the inner ventilation layer 2 is set to 28℃. The moisture absorption layer 1 can autonomously absorb indoor moisture into the inner ventilation layer 2, where water decomposition occurs. Moisture moves from the high-humidity room to the low-humidity inner ventilation layer 2, thus achieving high temperature and high humidity in the inner ventilation layer 2. When the air temperature in the inner ventilation layer 2 exceeds the set temperature of 28℃, the temperature sensor sends a signal to the controller. The controller then controls the fan 8 inside the lower ventilation vent to operate, drawing indoor air into the inner ventilation layer 2 and expelling the moisture to the outside via the fan 10. Simultaneously, the high-temperature, high-humidity indoor air passes through the inner ventilation layer 2. Layer 2 exhausts air to the outside, which can suppress the rise in indoor temperature 11. At the same time, some dry air will also enter indoor 11 through moisture absorption and desiccation layer 1, forming dehumidification self-circulation 19, reducing indoor humidity and latent heat load. External circulation 20 works in conjunction with dehumidification self-circulation 19 to dehumidify indoor 11, reducing indoor sensible heat load and latent heat load. When used with indoor air conditioning, it will greatly reduce energy consumption. When the indoor humidity sensor is higher than 70%, it sends a signal to the controller to exhaust the high humidity indoor air to the outside, reducing indoor humidity, reducing latent heat load, and reducing energy consumption.

[0038] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A passive building envelope system with dehumidification, cooling, and heat collection functions, comprising a heat storage wall disposed between two walls, characterized in that: It also includes a glass layer on the outside of the heat storage wall, a moisture absorption and release layer on the inside of the heat storage wall for absorbing and releasing moisture, and a circulation system for realizing indoor air circulation. The circulation system includes an outer ventilation layer formed by the glass layer and the heat storage wall, an inner ventilation layer formed by the heat storage wall and the moisture absorption and release layer, and an exhaust device for realizing indoor and outdoor ventilation layer circulation and indoor and inner ventilation layer circulation. The exhaust device includes a first upper ventilation pipe and a first lower ventilation pipe connecting the heat storage wall and the moisture absorption and release layer, and an upper ventilation port and a lower ventilation port on the moisture absorption and release layer. Fans are installed in the first upper ventilation pipe, the first lower ventilation pipe, the upper ventilation port, and the lower ventilation port. Temperature sensors are installed in the inner ventilation layer and the outer ventilation layer. It also includes a controller for controlling the circulation system to realize multiple ventilation modes. The temperature sensors send signals to the controller, and the controller sends signals to the fans to control the fans to operate and activate winter and summer ventilation modes to realize humidification and heat collection in winter and dehumidification and cooling in summer. The moisture-absorbing and desiccant layer is made of paper cellulose material; In the winter daytime ventilation mode, the exhaust device includes a first upper ventilation pipe, a first lower ventilation pipe, an upper ventilation opening, and a lower ventilation opening. The controller controls the fan to rotate. The outer ventilation layer forms an internal and external circulation channel with the interior, realizing the internal and external circulation of air between the interior and the outer ventilation layer. The inner ventilation layer forms an inner circulation channel with the interior, realizing the internal and internal circulation of air between the interior and the inner ventilation layer. The internal and internal circulation and the internal and external circulation work together to form a heat collection dual circulation mode. In the ventilation mode at night in summer, the exhaust device includes a first upper ventilation pipe and a first lower ventilation pipe. The controller controls the fan to rotate. The outer ventilation layer and the indoor space form an internal and external circulation channel, realizing the internal and external circulation of air between the indoor and outer ventilation layers. At the same time, the moisture absorption and desiccation layer autonomously absorbs indoor moisture into the inner ventilation layer and then exhausts dry air into the room, forming an autonomous dehumidification cycle. The internal and external circulation and the autonomous dehumidification cycle work together to form a dual circulation mode of dehumidification and cooling.

2. The passive building envelope system with dehumidification, cooling and heat collection functions according to claim 1, characterized in that: A humidity sensor is installed indoors, and the humidity sensor sends a signal to the controller.

3. The application of a passive building envelope system with dehumidification, cooling and heat collection functions as described in any one of claims 1-2 in a building.

4. The application according to claim 3, characterized in that: This passive building envelope system is applied to the entire wall or part of the wall of a building.

5. The application according to claim 3, characterized in that: This passive building envelope system can be applied to the entire roof or part of the roof.

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