Multifunctional photovoltaic system

Abstract

The invention discloses a multifunctional photovoltaic system. The multifunctional photovoltaic system includes a first photovoltaic panel, a refrigerating and heating system and an automatic power-onand power-off system, wherein the refrigerating and heating system comprises a semiconductor refrigerating sheet, a heat exchange coil pipe, a water storage tank, a first water pipe and a second water pipe, the semiconductor refrigerating sheet is provided with an upper variable-temperature surface for generating cooling capacity and a lower variable-temperature surface for generating heat, and the upper variable-temperature surface of the semiconductor refrigerating sheet is provided with a reflecting coating; the automatic power-on and power-off system comprises a second photovoltaic panel,a power supply device, a voltage transformation module and a power-on and power-off structure; the power-on and power-off structure is used for connecting the power-on and power-off structure when the power generation power of the second photovoltaic panel is larger than the preset power generation power, and is further used for disconnecting the power power-on and power-off structure when the power generation power of the second photovoltaic panel is smaller than or equal to the preset power generation power. The multifunctional photovoltaic system is simple in structure and low in cost, andthe power generation efficiency of the photovoltaic module and the heating effect of the semiconductor refrigerating sheet can be effectively improved.

Description

technical field [0001] The invention relates to the fields of photovoltaics and heat recovery, in particular to a multifunctional photovoltaic system. Background technique [0002] Under standard conditions, the photoelectric conversion rate of photovoltaic modules is 8% to 17%, and more than 80% of solar energy is not used, and the temperature of photovoltaic modules has a great impact on its power generation efficiency. As the temperature of the module itself increases, its power generation decreases. How to reduce the temperature of photovoltaic modules and improve power generation efficiency is a technical problem that needs to be solved urgently. [0003] The patent number is 201020140526.7, and the name is a photovoltaic square array waste water cooling recovery system integrated with the building roof. By setting multiple cooling water pipes on the back of the photovoltaic module, this technical solution reduces the temperature of the photovoltaic panel and improves ...

AI Technical Summary

Problems solved by technology

However, there are still some disadvantages in semiconductor refrigeration chips at present. For example, when cooling, the hot end needs to have a good heat dissipation effect to ensure high cooling efficiency, and when heating, the cold end needs to have a good cooling effect to ensure high heating efficiency.

[0005] In addition, since the temperature of photovoltaic panels varies under different weather conditions, in order to effectively recover the heat of photovoltaic panels in the existing technology, temperature monitoring systems and control devices are often installed during use. Although these devices can better control waste heat recovery The system recycles the heat of photovoltaic panels, but the application cost is very high in distributed photovoltaic projects. A single solar pyranometer costs thousands, and because it is installed outdoors, it is prone to failure after long-term use, and maintenance is more troublesome. For example, a The total investment of ordinary rural rooftop photovoltaic projects is more than 20,000 yuan. If monitoring systems and control devices are added, the investment costs will increase significantly

[0006] At present, there are few combined applications of photovoltaic systems and semiconductor refrigeration chips. How to reduce the temperature of photovoltaic modules at low cost to improve their power generation efficiency and reduce the energy consumption of hot water for users is currently a very important research content.

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