| Environmental pollution is a serious threat to human health and survival,development and utilization of clean and renewable energy is urgently needed.A demand for energy in the proportion of building energy consumption is more and more big,many developed countries are better than that of industrial and transportation energy consumption proportion of large energy consumption.In proportion to reduce building energy consumption of fossil fuels is the main measures: combining solar energy application technology and the construction of high energy consumption,which is able to guarantee the sustainable development of economy of our country the important condition.Solar photovoltaic power generation technology and photovoltaic wall system combined with solar energy efficient utilization technology is responding to the call for energy saving and emission reduction.Photovoltaic heat-collecting wall system can not only achieve power generation and heating functions,but also reduce the building load and improve the comprehensive utilization efficiency of solar energy.In this paper,design and build the solar collector wall test bench,is advantageous to the photovoltaic cell cooling,high photoelectric conversion efficiency of the battery.The system can run in winter conditions to provide heat to the room,is conducive to building energy saving.In this paper,the main research work include:1.Design and build the PV collection hot wall system,carried out in Beijing area in summer running condition of experimental tests,analysis the summer thermal and electronic system.The experimental results show that the glass plate and the photovoltaic battery temperature difference during the day up to 8.92 ℃.Whether it is day or night,the air temperature in the flow channel of the PV collector wall system is higher than the ambient temperature.Three days of average output were 38.08 w,38.91 w and 39.75 w;Three days,on average,the photoelectric conversion efficiency of 0.128,0.126,0.129,respectively.2.By establishing the mathematical models of each part of the PV collecting wall system,we find that the simulation results are well compared with the experimental data,the numerical values are very close,and the errors are also within the error range,which shows the reliability and accuracy of the system model.Use validated mathematical model respectively analyzes the flow of air flow channel height,the air flow channel width,the thickness of the air flow channel,vent area and the intensity of solar radiation,the photovoltaic cell coverage,PV collection hot wall’s best length-width ratio on the system.3.Use validated the mathematical model of performance prediction for the operation mode of system in winter,days of average output were 23.31 w,21.33 w and 22.06 w;Three days,on average,the photoelectric conversion efficiency of 0.142,0.141,0.143,respectively.Three days of average heat were 84.38 w and 80.17 w and 80.28 w;The average thermal efficiency of three days was 0.294,0.293 and 0.292,respectively.For simulating system for fan,and the results show that the dc fan to join in the system,can improve indoor room temperature,improve the electrical efficiency of system;For simulating system for PV collection hot wall,and the results show that the PV collection hot wall room indoor average temperature is higher than that of without PV collection hot wall.Under the working condition with PV collecting wall,the maximum indoor temperature of the room is 10.05 ° C,and the average temperature is 3.91 ° C. |
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