光伏热系统的实验与模拟研究-热能工程专业论文.docxVIP

中文摘要本文主要对光伏热系统和太阳电池在天津地区的性能进行了模拟和实验研 中文摘要 本文主要对光伏热系统和太阳电池在天津地区的性能进行了模拟和实验研 究。照射到太阳电池上的太阳辐射能，大部分都没有转化成电能而是变成热能， 提高了电池本身的温度。太阳电池的电力输出随温度升高而降低。本文设计制作 了一个空冷型非晶硅PV／T，它通过电池背面空气流道的冷却作用，在获得热量的 同时，降低了太阳电池的温度，提高了太阳电池的发电效率。 本文阐述了太阳能光伏、光热利用的原理和特点，分析了目前国内外太阳能 光伏热系统的发展水平和利用现状，并对此作了综述。 对非晶硅PV／T和太阳电池进行实验研究，在天津地区的太阳辐射情况下， 测试的非晶硅太阳电池的电效率约为4．4％，多晶硅太阳电池的电效率约为8．5 ％。空冷型非晶硅PV／T系统，自然通风冷却作用下电效率为4．56％，热效率为 26．1％，综合能量效率为38．1％；强迫通风冷却作用下电效率为4．61％，热效 率为32．8％，综合能量效率为44．9％。 建立了非晶硅PV／T的传热模型，以天津地区典型年的气象参数为依据，对 非晶硅PV／T和太阳电池进行了模拟研究，模拟研究的结果稍大于实验数据。 关键词：非晶硅光伏热系统太阳电池电热联用综合能量效率 ABSTRACTThis ABSTRACT This thesis presents a simulation and experimental study of a Photovoltaic／ Thermal Systems(PV／T)and solar cells in Tianjin．Most of the absorbed solar radiation by solar cells is not converted to electricity but increases their temperature， reducing their electrical efficiency．The photovoltaic temperature can be lowered by heat extraction with a proper natural or forced air circulation．An interesting alternative to plain solar cells is to use hybrid Photovoltaic／Thermai(PV／T)systems， which consist of solar cells coupled tO heat extraction devices，providing electricity and heat simultaneously． The thesis introduce the principle of the solar cells and solar heat absorber,and analyzes development level and using actuality of the PV厂r systems at home and abroad and makes a summarize for this question． We do an experimental study on amorphous silicon cell PV厂r systems and solar cells．Base on the radiation of Tianjin，the total PV efficiency of amorphous silicon cells is 4．4％．and multi-crystal silicon cells is 8．5％．when cooling by a natural air circulation，the total PV efficiency of amorphous silicon cells is 4．56％，thermal efficiency is 26．1％．integrated energy efficiency is 38．1％．when cooling by a forced air circulation，the total PV efficiency of amorphous silicon cells is 4．6 1％，thermal efficiency is 32．8％．integrated energy efficiency is 44．9％． Set up a heat transfer model of amorphous silicon cell P、竹systems．simula