Based On PVsyst Photovoltaic Bi-energy Roof Exhaust Fan System Optimization Research

As high-speed economic development,the world energy demand is increasing,theenergy shortage and ecological environment deterioration have become a seriousproblem for human survival. All countries in the world is developing clean energy andspeeding up to adjust energy structure. Solar photovoltaic power generation as a newtype of energy, because of its wide distribution, abundant resources, the advantage ofnever dried up,more and more get attention of people. Now photovoltaic powergeneration are generally the megawalt large power stations.Grid type photovoltaicpower generation are less used for independent commercial buildings andresidential.Secondly, in the practical engineering installation design, the concept of thebest angle and the optimum spacing is fuzzy,there is no theoretical support. In the actualdesign verification, the lack of application software to simulate the result. This topic isput forward under this background.This article as the family institute of Xi’an University of Technology,s photovoltaichybrid roof exhaust for research and improve object. First of all, introduces the situationof solar energy resources distribution in China, Access to meteorological data and drawthe graph of Horizontal total amoune, Scattering radiation, Direct radiation in Xi’an.Introduces the generation principle and output characteristics of photovoltaic cells, andsimulate the photovoltaic cells under different temperature and light intensity of outputcharacteristic curve, the conversion efficiency, putting forward the method of improvingthe efficiency of photovoltaic cells conversion. Based on this apply the method forcalculating the month average amount of solar radiation,grouping will dip anglecalculation,the change trend of rake face total increases with dip angle, concluded thebest angle. And apply Pvsyst software to simulated verification the total radiation and generating energy under tne best angle.Analyse the simulated result.With the support of the best angle, best spacing theory, design for the Xi’anUniversity of Technology, Analyse the simulated result, cover Loss diagram over thewhole year, Normalized productions, New simulation variant Balances and main results,Daily System Output Energy, Daily input/output diagram. In the end, count engineeringeconomy for the whole engineering, estimating the generating capacity over25years.And calculate the payback period, Asess impact on the envir onmental by the powergeneration project.