| The economic can not rapidly develop without the extensive use of traditionalenergy sources in the past decades. Which results in the shortage of fossil fuels andpollution of the environment. Now, this issue has drown a great attention of all thecountries in the world. Much research has focused on the exploration of effective,clean renewable energy technologies which is the only way to solve this problem.Solar energy stands out from many renewable energy with advantages of richresources, clean pollution-free and easily gained. Solar-thermal technology and solarphotovoltaic technology is the most mature technology and used widely in the world.In the course of photovoltaic power generation, only a few solar energy converts intoelectricity (only about15%), while the rest turns into heat energy. Which leads to therising of the battery temperature, and affects power generation efficiency. Therefore,reducing the temperature of the battery to improve power generation efficiency andutilizing the heat obtained from the battery has great significance for solar energyutilization technology.This article applies a efficient heat transfer element MHPA (Micro heat pipearray, referred MHPA) to the cooling of photovoltaic cells. And a micro heat pipearray photovoltaic solar thermal components (Micro heat pipe array-Photovoltaic/Thermal, short MHPA-PVT) is created. Due to efficient heat transfer performance ofMHPA, the heat can be efficiently transmitted to the cooling water, which can becollected to generate hot water for use, thus achieving a cogeneration effect. In thispaper, the system of MHPA-PVT module and its components as the research object,expand the following research work.First, the reference to test method for flat plate solar collectors, MHPA-PVTcomponents of the instantaneous efficiency of experimental tests of Beijing in the endof October, when the ambient temperature is19℃, MHPA-PVT moduleinstantaneous efficiency’s intercept can reached41.4%, the product of the collectorheat transfer factor and the overall heat loss coefficient of3.95, when inlettemperature is20℃，the total solar energy utilization efficiency can reach above50%,comprehensive performance efficiency more than70%, therefore, the technologysignificantly improves solar energy utilization.Secondly, using Fluent simulation software to establish MHPA-PVT dimensional steady-state model, the model includes a glass cover, battery, TPT back,micro heat pipe array, pipe heat exchanger and fluid, calculate the instantaneousefficiency of components and experimental comparing the data to verify the validityof the model. With the validation of the model, starting with running velocity,ambient temperature, wind speed and four factors irradiance on module performancewas simulated, the structural components, from the laying of the micro heat pipe array,arranged in the direction of the condensate Research to optimize the length anddirection of the four sections of the insulation layer, providing a theoretical basis forthe optimization component.Again, built experimental platform for families which need one kwh electricity,100liters’s45℃hot water. Conducted the annual monitoring, monitoring resultsshow that in March to November, when solar irradiance more than10MJ/(m2d), theend of the test, the temperature inside the tank mostly above45℃, the system in thecase of a small increase in the initial investment, increase revenue water cansignificantly reduce the investment recovery period, with a very broad applicationprospects.Finally, MHPA-PVT system operation’s mathematical model was established,the use of experimental data to verify the reliability of the model. The model isapplied in different areas of solar energy resources typical city MHPA-PV/T systemannual household thermoelectric properties were predicted, and the Beijing area dailyhot water needs of different user applications of the system made the annual revenuepredictive analysis. |
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