Flat-panel solar photovoltaic water-heating air-heating compound heat collector

Abstract

The invention relates to a flat-panel solar photovoltaic water-heating air-heating compound heat collector which comprises a box, evenly distributed copper tubes, an inlet tube, an outlet tube and a glass cover plate. A heat absorption plate is disposed in a cavity between the glass cover plate and the copper tubes. The copper tubes contact with the heat absorption plate. An air interlayer is formed between the glass cover plate and the heat absorption plate. Photovoltaic cells are evenly disposed on the top surface of the heat absorption plate, adjacent to the glass cover plate. The bottom surface of the heat absorption plate is evenly provided with micro flow stoppers. Two widthwise walls of the box below the bottom surface of the heat absorption plate are provided with an air inlet and an air outlet respectively. A through air channel is formed in the box below the bottom surface of the heat absorption plate. The flat-panel solar photovoltaic water-heating air-heating compound heat collector allows for frequency-by-frequency utilization of solar energy to generate electric energy and heat energy simultaneously, so that utilization rate of solar energy is increased greatly. The water-heating or air-heating modes can be selected according to season and environment requirements, yearly full utilization of light and heat is achieved, the temperature of a photovoltaic plate is lowered, and photoelectric conversion rate is increased.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic photothermal comprehensive utilization, and in particular relates to a flat-plate solar photovoltaic photothermal composite heat collector. Background technique [0002] Solar photovoltaic utilization and photothermal utilization are two important aspects of solar energy utilization. At present, the photoelectric conversion efficiency of solar photovoltaic modules is still low, and the temperature rise after the battery absorbs solar radiation will also lead to a decrease in photoelectric conversion efficiency. When the battery temperature rises by 1 °C, its photoelectric conversion efficiency will drop by 3 to 5‰. In recent years, solar photovoltaic / thermal integrated utilization (PV / T) systems have attracted widespread attention due to their good comprehensive utilization efficiency of solar energy. On the one hand, the PV / T system improves the comprehensive utilization efficiency of...

AI Technical Summary

Problems solved by technology

[0003] Solar air collectors are mainly used for building heating in winter, and solar energy cannot be effectively utilized at other times of the year

Solar hot water collectors are mainly used for hot water production in spring, summer and autumn, and the utilization rate is not high in winter, and it is prone to freezing

Therefore, neither the single hot water PV / T module nor the air PV / T module can realize the effective utilization of solar energy throughout the year, and it is necessary to carry out structural transformation

Existing dual-function collectors can provide hot water and room heating needs, but still require external power supply in active circulation to drive water pumps or fans

At the same time, the existing solar air collectors mainly increase the heat exchange between the air in the flow channel and the heat-absorbing plate by adding spoilers or heat-exchanging fins, but the setting of spoilers or fins will increase wind resistance and The energy consumption of the fan also increases the metal consumption and increases the manufacturing cost of the collector

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