基于TRNSYS的太阳能耦合燃料电池热电联产系统的模拟研究

Numerical investigation on cogeneration system of solar energy coupled with fuel cell based on TRNSYS

文章建立了太阳能耦合燃料电池热电联产系统的TRNSYS模型。采用镇江地区的天气数据(太阳直射辐射强度和环境温度),模拟了该系统在各典型日的火用效率。得出热电联产系统的集热量、发电量及火用效率均随着太阳辐射强度的增强而提高的结论。基于此,将热电联产系统的生命周期成本设为优化目标,采用Hooke-Jeeves算法对关键运行参数进行优化。结果表明:当集热器面积为15 m^(2),单电池片数为60个,蓄热水箱容积为5 m^(2),太阳能电池板面积为5 m^(2)时,可以获得最小的生命周期成本49.1万元,比常规模型降低11.7%;优化后的热电联产系统在典型日的火用效率为50%~57%,较常规热电联产系统提升50.0%~85.7%。

The numerical model of the cogeneration system of solar energy coupled fuel cell was established in TRNSYS.The weather data (direct solar radiation intensity and ambient temperature)in Zhenjiang region was used to simulate the exergy efficiency of this system on each typical day It is concluded that the heat collection,power generation and exergy efficiency of the cogeneration system all increase with the increase of solar radiation intensity.Based on this,the life cycle cost of the system was set as the optimization target.And the key operating parameters are optimized by Hooke-Jeeves algorithm.The results show that the minimum life cycle cost of 491 000 yuan can be obtained when the area of the collector is 15 m^(2),the quantity of fuel cell is 60,the volume of the hot water storage tank is 5 m;,and the area of the solar panel is 5 m^(2).The optimized cost is 11.7%lower than that of the conventional model.And the optimized cogeneration system has an exergy efficiency of 50% to 57% on a typical day,which is 50.0%to 85.7% higher than the conventional cogeneration system.