本文基于10 kW中低温太阳能与甲醇热化学互补发电实验平台,采用不同太阳辐照强度与吸收反应器内甲醇裂解反应、甲醇重整反应两种化学反应的有机集成,提出了一种新颖的变辐照与不同化学反应相匹配的主动调控新方法.针对不同典型日太阳辐照强度偏离设计值,探讨了热化学互补发电系统变辐照工况的特性规律.研究结果表明,在中低温太阳能热化学互补发电系统中,与采用单一的太阳能驱动甲醇裂解反应相比,本文提出的主动调控方法使互补系统的日均太阳能净发电效率从30％提高到36％,更接近设计工况,有效提高了甲醇燃料化学能的梯级利用程度.该方法为减小单位镜场面积、提高太阳能年均净发电效率提供了有效途径.
Based on our previous 10 kW mid-temperature solar hybridization power system with methanol decomposition,we proposed a new method for regulating the system on off-design condition.Both of the solar-driven methanol decomposition and the solar-driven methanol steam reforming were synergistically integrated with various solar irradiation in the new method.The system's off-design character was studied on different typical days.Result shows that:compared to priviously individual solar-driven methanol decomposition,the proposed method could increase daily net solar-to-electricity efficiency from 30％ to 36％,which is closer to the design condition.The new method improves the cascade utilization of methanol chemical energy and offers an effective approach for reducing the collector area and increasing the annually net solar-to-electricity efficiency.
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