基于TRNSYS的太阳能电热联产复合系统仿真

Simulated Research on Solar Photovoltaic-thermal Hybrid System Based on TRNSYS

为了提高太阳能利用率,结合平板电热联产(PVT)和槽式集热器(PTC)的优点,基于瞬态系统模拟软件TRNSYS建立了太阳能电热联产复合系统仿真模型。采用气象软件Meteonorm提供的典型气象年数据文件,以电效率、热效率以及太阳能保证率等参数为系统仿真指标,对集热水箱容积和供热水箱容积等关键参数进行系统仿真研究,并对系统进行全年性能分析。结果表明:集热水箱容积或供热水箱容积的增大都会引起太阳能保证率的增大,在集热水箱容积6 m^3、供热水箱容积8 m^3的条件下,全年平均PVT电效率可达12.40%,PVT热效率可达18.75%,PTC热效率可达50.97%,太阳能综合利用率可达82.13%,太阳能保证率可达52.21%,其中全年有5个月太阳能保证率达到60%以上。

To improve the efficiency of using solar energy,and merge the advantages of plate photovoltaic-thermal( PVT)and parabolic trough collector( PTC),a simulated model of solar photovoltaic-thermal hybrid system was established based on simulation software for transient systems,TRNSYS. We used characteristic weather data which is provided by Meteonorm. Electrical efficiency,thermal efficiency,and assurance rate of solar energy are our simulated objectives under the condition of a specific load in Xining. The critical parameters,i. e. the volume of thermal collection tank and thermal supply tank,are analyzed fora whole year in this work. As the results,the assurance rate of solar energy will heighten when the volume of thermal collection tank and thermal supply tank increases. Under the condition that the volume of thermal collection tank is 6 m3 and the volume of thermal supply tank is 8 m3,the annual average electric efficiency and thermal efficiency of PVT can reach to 12. 40% and 18.75% respectively,and the annual average thermal efficiency of PTC can reach to 50. 97%. The integrated utilization of solar energy can reach to 82. 13%. Meanwhile,the assurance rate of solar energy was approximately 52. 21%,this value came up to60% in 5 months of whole year.