Solar power generation circulating cooling system and control method thereof

Abstract

The invention relates to the technical field of solar power generation, and particularly relates to a solar power generation circulating cooling system and a control method thereof. During a process in which water is sprayed on the surface of a PV module for temperature reduction and efficiency improvement, a circulating water pump is started, cooling water in a water tank is fed to sprayers uniformly distributed on the solar PV module via the circulating water pump, and spraying water flows across the surface of the PV module, brings heat, flows in a water receiving tank and returns to the water tank. When temperature of water in the water tank meets a certain condition as heat of the PV module is absorbed, countercurrent evaporation heat transfer is carried out between air pumped from around the bottom part of a cooling tower by a fan and the high-temperature water in the water tank to bring heat in the high-temperature water, low-temperature water is obtained and flows back to the water tank, and thus, low-temperature water can be ensured to continuously sprayed on the surface of the PV module for cooling. According to the solar power generation circulating cooling system and the control method thereof, the working temperature of a solar cell can be reduced, the problem of dirt on the surface of the solar PV module can be solved, and the power generation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a solar power generation cycle cooling system and a control method thereof. Background technique [0002] my country is a country rich in solar energy resources, and the annual average daily radiation in most areas is 4 kWh / m 2 .d and above, Tibet up to 7 kWh / m 2 .d, resource distribution is rich in the west and less in the east. As a new solar energy utilization method suitable for the eastern region, solar photovoltaic power generation technology has realized the comprehensive utilization of energy and effectively improved the utilization rate of solar energy in the eastern region; at the same time, because it does not consume fossil fuels, has no pollution, is safe and convenient to apply, It has increasingly become the main research direction of solar energy applications. [0003] Solar energy is a kind of radiation, which can be turned into electrical energ...

AI Technical Summary

Problems solved by technology

The current research data show that the cooling method of flat solar modules using water as the cooling medium is mainly to cool the panels by passing chilled water through the flow channels installed on the PV / T module backplane. This kind of backplane does not contact with water. The heat transfer method belongs to indirect convection heat transfer, and the cooling efficiency is low

[0005] In addition to temperature, the dirt and dirt formed on the surface of flat-panel solar photovoltaic modules due to long-term use under natural conditions also affects the photoelectric conversion efficiency of solar cells.

The existing method of cooling water through the backplane flow channel of flat-panel solar modules can only solve the influencing factor of temperature, but cannot solve the problem of efficiency drop caused by dust, and from the aspects of economy and convenience, flat-panel solar The cost of cooling water through the flow channel on the back plate of the module is high, and it is inconvenient to use and install

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