Egypt wants to use 'water' to cool photovoltaic modules

Solar photovoltaic webex: leave footsteps accelerate in spring, hot summer will come, cooling equipment and summer scenic spot after a year to return to the list of keyword search, and in addition to people need to cool them down, solar panels also need to cool, actually high temperature through the contrary it will impede efficiency, Egypt recently scientists have developed a special & other; Water & throughout; Cooling equipment.

as solar cost less and less, technology more mature, large-scale solar power plants can be found in many countries, solar energy, including solar markets in Africa and the Middle East in recent years rapid growth, China solar energy network, with abundant sunshine, huge market space, solar firms in these countries to find a new blue ocean.

and to improve the efficiency of solar power, the pursuit of the sunshine is not enough light, the temperature is also need to consider the elements of the sweltering temperatures tend to make the module power than expected, to this problem in order to alleviate the current development of their own solar, Egypt this ha university ( Benha University） Through the water, alumina ( 氧化铝) With calcium chloride hexahydrate ( CaCl2H12O6） , the decision from the first, from the inside out & other; Cold & throughout; Solar panels.

this study with previous solar installation company in France Sunbooster cooling technology has a bit of the same, when the temperature above 25 ℃, solar panels above drill pipes with many small holes through them will start to drainage, for cooling the decontamination, by the way, a solar panel shower manufacturer claims can improve annual output 8 - 12%.

but this, scientists at the university of the cooling system in the solar panels below, including cooling combination contains a cooling unit, dc pumps, valves, water flow sensor, a connecting pipe, etc. , water and alumina nanoparticles, calcium chloride hexahydrate mixture will flow through the module at the bottom of the aluminum pipe, China solar energy network, help panel cooling.

in general calcium chloride is used with a moisture absorption, prevent freezing ice melting snow good helper, while calcium chloride hexahydrate solid can also as phase change materials ( PCM) , because of its melting point is 30 ℃, heat of fusion of 190 KJ/mol, industrial waste heat recovery can also be used for low and medium, temperature, solar radiation heat utilization and so on.

team also has the experimental group and control group, record the solar panel of the surface of the current and voltage, temperature, water temperature and environmental sunshine, wind speed, etc. , the team said that regardless of whether or not to use water, photovoltaic (pv) grid, or aluminum oxide nanoparticles, the mixture of calcium chloride hexahydrate, as long as the cooling system can lower the temperature of the battery, improve the efficiency of power generation.

as to which effect is better? , the researchers reported experimental solar portal, new mixture cooling effect is better than pure water cooling, and the best ratio is 75% water and 25% alumina nanoparticles, calcium chloride hexahydrate.

solar photovoltaic network statement: this information is reproduced from the power grid cooperation media or other Internet website, solar photovoltaic network published the article for the purpose of the information, does not mean that agree with his point of view or confirm its description. The article content is for reference only.

this paper statistics the September to today issued a total of 2. 85 gw pv power plant EPC and 1. 9 gw component bid opening information. Among them, the EPC project owner units is given priority to with soe/state, this also reflected from the side, in project bidding and parity, the state-owned enterprises have become the absolute main force. Specifically, CGNPC in development of 410 mw, 603 mw, guangzhou energy saving 220 mw, 345 mw, jin can group the people vote for 200 mw, 190 mw hubei energy group, huaneng power 180 mw