CN205224455U - Reflective insulation formula photovoltaic building facade and photovoltaic building - Google Patents

Abstract

The utility model relates to a facade of a reflective heat-insulating photovoltaic building and a photovoltaic building. The facade of a reflective heat-insulating photovoltaic building includes a building exterior wall and a photovoltaic panel arranged on the outside of the building exterior wall. The exterior surface of the building exterior wall is provided with A heat-reflecting layer, and an air flow channel for air circulation exists between the photovoltaic panel and the building exterior wall; a photovoltaic building is a building with at least one side of a reflective heat-insulating photovoltaic building facade. Compared with the prior art, the existence of the heat reflective layer of the utility model can reflect the heat emitted by the back plate of the photovoltaic panel, and alleviate the temperature rise in the building room caused by the heat generated by the back plate of the photovoltaic panel. The heat is carried away from the wall through the air.

Description

Reflective insulation photovoltaic building facade and photovoltaic building

technical field

The utility model relates to the field of photovoltaic building facades, in particular to a reflective heat-insulating photovoltaic building facade and a photovoltaic building.

Background technique

Photovoltaic building is a multi-functional building form developed in recent years that uses solar power to power buildings. Combining photovoltaic panels with buildings, especially high-rise buildings, and using the huge facade area of high-rise buildings to absorb solar energy to provide power for buildings to alleviate the problem of electricity shortage in cities, especially large and medium-sized cities, is a current development direction with broad prospects.

For example, Chinese patent CN102587545A discloses a photovoltaic building glass curtain wall assembly, including solar cells, glass substrates, glass backplanes, battery interlayers, glass substrates, battery interlayers, solar cells, battery interlayers, and glass backplanes from bottom to top Arranged in sequence, the solar cells are respectively connected to the glass substrate and the glass backplane through the battery interlayer.

However, photovoltaic panels also generate heat while absorbing sunlight to generate electricity, and an increase in temperature will lead to an increase in the temperature of the surrounding building environment. Therefore, photovoltaic curtain walls are generally not recommended to be used directly as building facades like glass curtain walls, but photovoltaic panels. The curtain wall is combined with the existing facade of the building (including the external protective wall and the external load-bearing wall) to be applied as a double-layer facade. When the photovoltaic curtain wall absorbs sunlight to generate electricity, the temperature of the building facade will still rise due to the heat generated by the backplane of the photovoltaic panel. As a result, the indoor temperature of the building will rise, and the air conditioning load will increase in summer.

Utility model content

The purpose of this utility model is to provide a reflective and heat-insulating photovoltaic building facade that alleviates the temperature rise in the building room caused by the heating of the photovoltaic panel backplane in order to overcome the above-mentioned defects in the prior art, and the configuration of the photovoltaic building facade Photovoltaic buildings.

The purpose of this utility model can be achieved through the following technical solutions:

A reflective heat-insulating photovoltaic building facade, comprising a building exterior wall and a photovoltaic panel arranged on the outside of the building exterior wall, the exterior surface of the building exterior wall is provided with a heat reflective layer, and the photovoltaic panel and the building exterior wall There are air channels for air circulation.

The heat reflection layer is arranged on the projection surface of the photovoltaic panel on the exterior wall of the building, wherein the projection surface of the photovoltaic panel is the projection surface of the photovoltaic panel on the exterior wall of the building.

A heat insulation layer for blocking heat conduction is also arranged in the building exterior wall.

A photovoltaic building, at least one wall of the photovoltaic building adopts a reflective heat-insulating photovoltaic building facade.

The sunny side of the photovoltaic building adopts a reflective and heat-insulating photovoltaic building facade.

The photovoltaic building is provided with an air supply device for sending air into the air flow channel, and the air supply device sends air from below the air flow channel.

Compared with the prior art, the utility model has the following advantages:

1) The existence of the heat reflective layer can reflect the heat emitted by the back plate of the photovoltaic panel, and alleviate the temperature rise in the building caused by the heat generated by the back plate of the photovoltaic panel. noodle.

2) The heat reflective layer is installed on the projection surface of the photovoltaic curtain wall on the outer wall of the building, which can reduce the cost. In the position where the photovoltaic curtain wall is not installed, there is no need to install a heat reflective layer.

3) There is also a heat insulation layer in the exterior wall of the building to block heat conduction, which can realize the heat resistance, heat insulation and heat preservation of the wall to the interior by cooperating with the heat reflection layer.

4) The heat reflective layer adopts heat reflective coating. Since the process of blocking indoor and outdoor heat exchange can be achieved only by brushing the heat reflective coating, it is simpler than the general structure for cooling, heat preservation, and heat insulation, and it is easier to apply in actual projects. At the same time, in addition to high reflection of thermal radiation, the current heat reflective coating also has the advantages of high temperature resistance, crack resistance, and good durability. It has better durability than ordinary structural heat insulation, and is compatible with photovoltaic panels Used together, it can reduce the number of maintenance and greatly reduce the additional cost of labor and non-structural component installation and maintenance; moreover, the structure of the building facade is simple to apply heat-reflective coating, and there are no additional non-structural components. In the process of encountering potential disasters, reduce the secondary disasters that may be caused by non-structural components.

5) The air supply device can be supplemented by mechanical ventilation when the airflow velocity is slow and the weather is hot, so as to achieve the best heat dissipation effect and slow down the aging of the heat reflection layer and photovoltaic panels, prolonging their life.

Description of drawings

Fig. 1 is the forward perspective structural schematic diagram of the facade of the reflective heat-insulating photovoltaic building of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Among them: 1. Building exterior wall, 2. Photovoltaic panel, 3. Heat reflective layer, 4. Bolt, 5. Aluminum alloy hanging seat horizontal profile, 6. Vertical aluminum alloy profile, 7. Air flow channel outlet, 8. Air Runner, 9, heat reflection indication, 10, air flow channel inlet.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the utility model, and the detailed implementation and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

A reflective and heat-insulated photovoltaic building facade, as shown in Figures 1 and 2, includes a building exterior wall 1 and a photovoltaic panel 2 arranged on the outside of the building exterior wall 1, and the exterior surface of the building exterior wall 1 is provided with a heat reflection layer 3 , and there is an air channel 8 for air circulation between the photovoltaic panel 2 and the building exterior wall 1 . Specifically, the photovoltaic panel 2 can be installed on the facade of the building through the sub-frame. As shown in FIG. 1 , the aluminum alloy hanger horizontal profile 5 and the vertical aluminum alloy profile 6 are used and connected by bolts 4 . The building exterior wall 1 is an exterior maintenance wall or an exterior load-bearing wall.

When the sun shines, the photovoltaic panel 2 absorbs solar energy to generate electricity, and the electric energy is collected by wires to the storage battery or circuit control equipment for direct use. Since the photovoltaic panel 2 absorbs solar energy to generate electricity, its backplane converts light energy into heat energy. The increase of the temperature of the backboard will cause the temperature of the surrounding environment to rise simultaneously, and the use of the heat reflection layer 3 can achieve the effect of reflecting heat radiation and preventing the temperature rise in the building, thereby reducing the effect of air conditioning load in summer.

The heat reflection layer 3 is arranged on the projection surface of the photovoltaic panel (or photovoltaic curtain wall) on the building exterior wall 1, wherein the projection surface of the photovoltaic panel (or photovoltaic curtain wall) is the projection of the photovoltaic panel (or photovoltaic curtain wall) on the building exterior wall 1 The projection surface is a vertical projection surface relative to the building exterior wall 1 and the photovoltaic panel 2 (or photovoltaic curtain wall).

The exterior wall 1 of the building is also provided with a heat insulation layer for blocking heat conduction, which cooperates with the heat reflection layer to realize the heat resistance, heat insulation and heat preservation of the wall to the interior.

The heat reflective layer 3 is a heat reflective coating, which is made of hollow microspheres and high refractive index titanium dioxide (TiO ₂ ) as the main filler, such as American shield (Thermo-hield) energy-saving coatings, Singapore high-tech (HIT) coatings , the LO/MIT-1 heat insulation paint of the American Solar Group and various domestic heat reflective paints. And paint on the outer surface of building exterior wall 1. Specifically, the coating is generally composed of hollow microspheres and high refractive index TiO ₂ , and the heat reflection ratio can reach more than 80%, which can reflect most of the heat radiation from photovoltaic panels and the external environment of the building. When the photovoltaic panel absorbs solar energy and generates heat, it radiates heat to the building exterior wall 1, and the heat radiation is reflected at the heat-reflective coating of the building exterior wall 1, and the air between the photovoltaic panel 2 and the building exterior wall 1 is heated and then rises. The cold air is supplemented from the gap at the bottom of the photovoltaic panels and continues to take away heat, thereby achieving the effect of blocking the temperature rise of the indoor environment of the building. The control of the temperature rise of the building exterior wall 1 can slow down the temperature rise of the back plate of the photovoltaic panel 2 and also help to ensure the power generation efficiency of the photovoltaic panel 2 . The reflective and heat-insulating photovoltaic building facade of the application is widely applicable to rural, urban, multi-storey and high-rise buildings. It is energy-saving and heat-insulating, green and environmentally friendly, and has positive significance for the protection of the environment and resources.

In FIG. 2 , there is an air channel 8 between the building exterior wall 1 and the photovoltaic panel 2 . The building exterior wall 1 is painted with heat reflective coating. When the photovoltaic panel 2 receives sunlight and heats up, the heat reflective coating on the facade of the building reflects the heat back, and the heated air in the air flow channel 8 rises to form a gap from the air flow channel inlet 10 to the air flow channel outlet 7. airflow,

A photovoltaic building, at least one wall of the photovoltaic building adopts a reflective heat-insulating photovoltaic building facade. Specifically, the sunny side of the photovoltaic building adopts a reflective heat-insulating photovoltaic building facade. Preferably, the top of the sunny side of the photovoltaic building photovoltaic building wall is a reflective heat-insulating photovoltaic building facade, and the sunny side adopts a reflective heat-insulating photovoltaic building facade. The facade can reduce the cost. In addition, only the top of the sunny side is a reflective and heat-insulated photovoltaic building facade, which is the most cost-effective approach.

The photovoltaic building is equipped with an air supply device for sending air into the air flow channel 8, and the air supply device sends air from the bottom of the air flow channel 8, which can be supplemented by mechanical ventilation when the air flow speed is slow and the weather is hot.

Claims (7)

1. A reflective heat-insulating photovoltaic building facade, comprising a building exterior wall (1) and a photovoltaic panel (2) located on the outside of the building exterior wall (1), characterized in that, the outside of the building exterior wall (1) A heat reflection layer (3) is provided on the surface, and an air flow channel (8) for air circulation exists between the photovoltaic panel (2) and the building exterior wall (1). 2. A reflective and heat-insulated photovoltaic building facade according to claim 1, characterized in that the heat reflective layer (3) is arranged on the projection surface of the photovoltaic panel on the building exterior wall (1). 3. A reflective heat-insulating photovoltaic building facade according to claim 1, characterized in that, the building exterior wall (1) is also provided with a heat insulating layer for blocking heat conduction. 4. The facade of a reflective heat-insulating photovoltaic building according to claim 1, characterized in that, the heat reflective layer (3) is a heat reflective coating. 5. A photovoltaic building comprising a photovoltaic building facade as claimed in any one of claims 1-4, wherein at least one side of the wall of the photovoltaic building is a reflective heat-insulating photovoltaic building facade. 6. The photovoltaic building according to claim 5, characterized in that, the sunny side of the photovoltaic building is a reflective insulation type photovoltaic building facade. 7. The photovoltaic building according to claim 5, characterized in that, the photovoltaic building is provided with an air supply device for sending air into the air flow channel (8), and the air supply device flows from the air flow Air is fed under the channel (8).