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提出了一种太阳能热化学与化学回热过程联合的冷热电联产系统。利用太阳能驱动甲醇分解反应,产生的合成气在内燃机中燃烧作功,内燃机排烟余热与导热油换热,并驱动甲醇分解反应以回收余热。对系统进行了热力学性能分析,探究了全年典型日下系统热力性能与储能特性规律.研究结果表明:设计工况下系统一次能源利用率为78.4%,太阳能净发电效率为21.1%。在300~1000 W/m~2的直射辐照强度范围内,系统可以实现稳定运行,太阳能净发电效率稳定在19.3%~21.5%的变化范围内。
A combined heat and power (CHP) system with solar thermochemistry and chemical heat recovery process is proposed. The use of solar energy to drive the methanol decomposition reaction, the resulting syngas combustion work in the internal combustion engine exhaust heat and heat transfer oil heat exchanger, and drive methanol decomposition reaction to recover waste heat. The thermodynamic performance of the system was analyzed and the thermal and energy storage characteristics of the typical system were investigated.The results show that the primary energy efficiency of the system is 78.4% and the net efficiency of solar power generation is 21.1% under the design conditions. The system can achieve stable operation within the direct irradiation intensity range of 300-1000 W / m ~ 2, and the net solar power generation efficiency is stable within the range of 19.3% ~ 21.5%.