CN102102458A - Multihole heat collection wall type solar house - Google Patents

Abstract

The invention discloses a solar house with a porous heat-collecting wall. A glass wall, a porous solar wall and a sunny wall are sequentially installed on the sunny side from the outside to the inside. A first warm air channel is formed between the glass wall and the porous solar wall. The porous solar wall A second warm air passage is formed between the sun facing wall; a fan is arranged at the lower end of the sun facing wall, and an air circulation opening connected with the first warm air passage is opened on the glass wall. The invention overcomes the deficiencies of the prior art, has higher utilization rate of solar energy, sufficient fresh air volume, relatively uniform temperature field in the solar room, can conveniently control the indoor air temperature, and is suitable for common residential buildings, warehouses, hospitals, and supermarkets Heating the building.

Description

A solar house with a porous heat-collecting wall

technical field

The invention belongs to the field of solar houses integrated with solar energy and buildings, more specifically, it relates to a heating house equipped with glass walls and porous solar walls.

Background technique

In the middle and lower reaches of the Yangtze River in China, the temperature is low in winter and many residential houses are not equipped with special heating equipment. If you continue to use air conditioning for heating, while increasing the energy consumption of the building, it will also have a negative impact on the environment. Solar energy is an inexhaustible and inexhaustible energy without any pollution to the environment. How to utilize solar energy and building itself to solve this building heating problem seems particularly important.

At present, the relevant research on solar houses mainly focuses on the research on the outer wall on the sunny side. For this reason, the Chinese patent publication No. CN101672115, the invention patent document on March 17, 2010, discloses a heat-collecting and heat-storing wall-type passive The shortcomings of the solar house mainly include the following four points: first, the solar heat-absorbing panel is directly in contact with the outside air, and the heat dissipation is relatively large; second, the fresh air volume is insufficient. The buoyancy principle of the air promotes the circulation of the air in the room and the warm air passage, which will cause insufficient fresh air volume; thirdly, it is difficult to control the temperature of the air sent into the room. When the solar radiation is strong, the air will take away the solar heat collection The body has more heat, and the energy storage of the sunny wall is relatively small. When the solar radiation becomes weaker, the air is heated to a much smaller extent, resulting in a large temperature difference between the front and rear air supply; fourth, the indoor temperature field distribution Uneven, because the passive sun room uses the buoyancy principle of hot air to promote the air circulation between the room and the warm air channel, resulting in a lower air temperature on the back side of the room, and it is easy to form a thermal dead zone in the room. Between the side and the warm air channel, a closed air flow loop is easily formed, resulting in a thermal short circuit.

Contents of the invention

The invention overcomes the deficiencies in the prior art and provides a solar house with higher utilization rate of solar energy, sufficient fresh air volume, and convenient control of indoor air temperature, and it is not easy to form thermal dead angles and thermal short circuits in the solar house .

In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

A solar house with a porous heat-collecting wall, comprising a sun-facing wall, characterized in that, a porous solar wall and a glass wall are sequentially installed outside the sun-facing wall, a first warm air channel is formed between the glass wall and the porous solar wall, and the porous solar wall and the porous solar wall A second warm air channel is formed between the sunny walls; a fan is arranged at the lower end of the sunny wall, and an air flow opening connected with the first warm air channel is opened on the glass wall.

As an optimization, the porous solar wall adopts porous ceramic material or porous metal material.

As an optimization, there is also a return air pipe, one end of which is connected to the solar room, and the other end passes through the sun-facing wall and the porous solar wall to connect to the first warm air passage.

As an optimization, a solar chimney is placed on the roof of the solar house.

As an optimization, a rain shield is placed on the top of the glass wall.

As an optimization, roller blinds are provided in the first warm air channel

Compared with the prior art, the present invention has the following beneficial effects: (1) the utilization efficiency of solar energy is higher, and the outermost glass wall not only reduces the heat dissipation loss of the porous solar wall, but also forms the first warm air together with the porous solar wall The channel makes the air be heated for a longer time. Due to the porous structure of the porous solar wall, its heat exchange area is also much larger than that of ordinary flat plate heat collectors, and its heat exchange effect is also better than that of ordinary heat collectors. The air temperature is also higher; (2) by controlling the fan speed to control the air flow rate, and then adjust the indoor temperature, so that the temperature of the air sent into the room can be conveniently controlled. (3) The amount of fresh air is sufficient, and the present invention introduces fresh air from the outside, rather than simply forming a closed loop of air circulation between the room and the warm air passage; (4) Under the action of the fan, the hot and cold air is mixed Better, the temperature field is relatively uniform, which effectively prevents thermal dead ends and thermal short circuits.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a partially enlarged view of Figure 1;

Fig. 3 is the I-I sectional view of Fig. 1;

Fig. 4 is II-II sectional view of Fig. 1;

Fig. 5 is a schematic diagram of indoor and outdoor air temperature variation curves according to an embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and preferred embodiment, the patent of the present invention is described in further detail:

In Figures 1 and 2, glass walls 4, porous solar walls 5, and sunny walls 6 with corresponding shapes and sizes are sequentially arranged on the sunny side of the solar room from outside to inside. Porous solar wall 5 selects porous ceramics or porous metal material (such as aluminum, stainless steel) for use, and the sunny side of porous solar wall 5 is set to black, to increase the absorptivity to solar radiation, can be coated with black paint on its surface or A black absorber layer is used to achieve this. A first warm air channel is formed between the glass wall 4 and the porous solar wall 5 , and a second warm air channel is formed between the porous solar wall 5 and the sun-facing wall 6 . The glass wall 4 is provided with an air circulation port communicating with the first warm air channel, and the lower end of the facing sun wall is provided with a blower fan 7. The selection and quantity of the blower fan can comprehensively consider the size of the solar room indoor 9 and the air passing through the first warm air channel, The resistance of the porous solar wall 5 and the second warm air channel is determined.

The heating principle of the solar room is as follows: sunlight passes through the glass wall 4 and shines on the porous solar wall 5. After the porous solar wall 5 absorbs solar radiation, the temperature of the wall body of the porous solar wall 5 increases, and the outdoor air is pumped by the fan 7. Under the action of force, the air flow port at the upper end of the glass wall 4 enters the first warm air channel, exchanges heat with the glass wall 4 and the porous solar wall 5, and the hot air after heat exchange enters the second warm air channel through the porous solar wall , continue to exchange heat with the porous solar wall 5 and the sunny wall 6, and finally be sent into the solar room indoor 9. In order to ensure the quality of the air sent into the room 9, corresponding air filter screens can be installed in front of or behind the blower fan 7.

The air velocity is controlled by controlling the rotating speed of the fan 7, thereby adjusting the indoor temperature. When the air flow rate was larger, the time for the air to exchange heat in the first warm air channel, the porous solar wall 5 and the second warm air channel was very short, and the heat taken away was less, and the temperature of the air sent into the room was also lower. low; when the air flow rate is small, the time for the air to exchange heat in the first warm air channel, the porous solar wall 5 and the second warm air channel is longer, and the heat taken away is more, and then the temperature of the air sent into the room is also low. higher.

In order to make the temperature rise of indoor air higher, the speed of temperature rise is faster, return air duct 2 can also be set between the indoor 9 of the solar room and the first warm air passage, and it can be placed on the upper end of the porous solar wall heating room. The hot air in the room 9 enters the glass passage through the air return pipe 2 and is reheated once, which not only makes the indoor air temperature rise higher, but also makes the indoor air temperature rise faster. A valve can be installed on the air return pipe 2, and the air flow through the air return pipe can be adjusted according to demand.

Solar chimney 8 can also be set on the roof of solar house, as the auxiliary of blower fan 7. Solar chimney 8 utilizes the buoyancy principle, specifically as follows: air is heated in the passage of solar chimney 8, and temperature raises, and density reduces, so hot air rises, forms a kind of upward draft. This drawing force of solar chimney 8 can be utilized to assist blower fan 7 to introduce outdoor air into the room 9 through the air circulation port, first and second warm air passages, and finally lead out of the room by solar chimney 8 . When the solar radiation is not strong, in order to reduce the indoor heat loss, the solar chimney 8 can be closed to reduce the outflow of hot air.

As shown in Fig. 1, 3, 4, can also be provided with rain shield 1 above the sunny end of glass wall 4, though this has prevented rainwater etc. from wet porous solar wall 5 by the air circulation opening of glass wall top, but to porous sun wall The lighting at the top of the solar wall has an impact, so the upper part material of the porous solar wall 5 and the sun-facing wall 6 can be changed into glass 10 to increase the indoor brightness.

In order to adapt to different seasons, a roller blind 3 can be set in the first warm air passage. In winter, if heating is required, the roller blind 3 is put away so that the sunlight passes through the glass wall 4 and can be irradiated on the wall of the porous solar wall 5; And return air pipe 2, prevent outdoor hot air from flowing into indoor 9.

An example is enumerated below: the sun room sits north and faces south, and its exterior dimensions are: the width in the east-west direction is 4 meters, the depth in the north-south direction is 3 meters, and the height in the up-down direction is 2.5 meters. Porous solar wall 5 adopts porous ceramics, and its sunny side is sprayed with black paint. The sunny wall 6 adopts toughened glass to increase the brightness of the interior 9. The rest of the walls are made of color plates. The inside and outside of the color plates are stainless steel plates, and the middle is 100mm thick thermal insulation material, which has the advantages of good thermal insulation effect, high strength, and easy installation. Eight return air pipes 2 are arranged in the indoor 9 and the first warm air passage. Six axial flow fans 7 are arranged at the lower end of the sun-facing wall 6 . In the case of cloudy weather with the fan stopped, the experiment of the porous heat-collecting wall solar house was carried out. The maximum temperature of the day was 16°C, and the minimum temperature was 6°C. The experiment started at 7:30 and ended at 20:30. The outdoor air temperature and the temperature at a height of 1.5 meters in the center of the room were recorded. Figure 5 shows the experimental results of the porous solar wall heating room. It can be seen that the maximum indoor temperature can reach 27.8°C, and the maximum temperature rise can reach 13.8°C. The experimental results show that the actual heating effect of the porous heat collecting wall solar house is good.

Claims (6)

1. A porous heat-collecting wall type solar house, comprising a sun-facing wall, is characterized in that, a porous solar wall and a glass wall are installed successively outside the sunny wall, the first warm air passage is formed between the glass wall and the porous solar wall, and the porous solar wall A second warm air passage is formed between the wall and the sun-facing wall; a fan is arranged at the lower end of the sun-facing wall, and an air circulation opening connected with the first warm air passage is opened on the glass wall. 2. The solar house with porous heat collecting wall according to claim 1, characterized in that, the porous solar wall is made of porous ceramic material or porous metal material. 3. The solar house with porous heat-collecting wall according to claim 1, characterized in that, there is also a return air duct, one end of which communicates with the interior of the solar house, and the other end passes through the sunny wall and the porous solar wall to communicate with the first warm air aisle. 4. The porous heat collecting wall type solar house according to claim 1, 2 or 3, characterized in that a solar chimney is placed on the roof of the solar house. 5. The porous heat-collecting wall solar house according to claim 1, 2 or 3, characterized in that a rain shield is placed on the top of the glass wall. 6. The solar house with porous heat-collecting wall according to claim 1, 2 or 3, characterized in that a roller blind is provided in the first warm air passage.

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