Solar photovoltaic-commercial power jointly driven photovoltaic and photothermal integrated dual source heat pump hot water system and operation method thereof

Abstract

The invention provides a solar photovoltaic-commercial power jointly driven photovoltaic and photothermal integrated dual source heat pump hot water system. A heat pump compressor of the system is a direct current speed regulation compressor. According to a predetermined control scheme, the system can directly drive a heat pump through photovoltaic direct current to obtain domestic hot water whensunshine exists, and the system can be driven by the commercial power when light is not good, which makes up for the shortcoming that solar energy is unstable. A photovoltaic cell that provides directcurrent for the system is a photovoltaic and photothermal integrated battery module cooled by a flat heat pipe. Through efficient cooling, the module can improve the power generation efficiency of the photovoltaic cell, can obtain additional heat for directly producing domestic hot water or being provided for a dual source heat pump, and can also avoid anti-freezing problem caused by water cooling of the photovoltaic cell. Through intelligent control of the system, the solar photovoltaic-commercial power jointly driven photovoltaic and photothermal integrated dual source heat pump hot water system can comprehensively and efficiently utilize solar energy, can stably operate without being affected by weather factors such as insufficient sunshine, and has obvious advantages of energy saving,environmentally friendly and economic.

Description

technical field [0001] The invention relates to a photovoltaic-photothermal-integrated dual-source heat pump hot water system driven by solar photovoltaic-mains electricity and an operating method thereof. Background technique [0002] At present, the mainstream methods of ordinary solar water heaters are vacuum tube collectors and flat plate collectors. However, ordinary solar water heaters cannot overcome the shortcoming of intermittent solar energy, and will not be able to provide hot water in poor sunshine or cold weather. [0003] In addition, during the power generation process of the solar photovoltaic cell, the power generation efficiency of the cell decreases with the increase of its own temperature. The actual situation shows that the operating temperature of ordinary photovoltaic cell modules is usually higher than 50°C when the sunlight intensity is high, and its power generation efficiency is much lower than that under the test condition of 25°C. The heat gene...

AI Technical Summary

Problems solved by technology

However, ordinary solar water heaters cannot overcome the intermittent shortcomings of solar energy. In poor sunshine or cold weather, the output will be insufficient, or even unable to provide hot water.

[0003] In addition, during the power generation process of solar photovoltaic cells, the power generation efficiency of the battery decreases with the increase of its own temperature.

The actual situation shows that when the sunlight intensity of ordinary photovoltaic cell modules is high, its working temperature is usually higher than 50°C, and its power generation efficiency is much lower than the test condition at 25°C

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