Solar thermal power cycle with integration of methanol decomposition and middle-temperature solar thermal energy
Solar thermal power cycle with integration of methanol decomposition and middle-temperature solar thermal energy
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DOI：
10.1016/j.solener.2004.06.019
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发表时间：
2005
期刊：
影响因子：
6.7
通讯作者：
H. Hong;Hongguang Jin;J. Ji;Zhifeng Wang;R. Cai
中科院分区：
文献类型：
--
作者：
H. Hong;Hongguang Jin;J. Ji;Zhifeng Wang;R. Cai
本文提出了一种集甲醇分解和中温太阳能为一体的新型太阳能热动力循环，并基于化学（火用）梯级利用原理对其特性进行了研究。此外，在150-300°C的温度和大气压下实验研究了用催化剂的甲醇分解。甲醇燃料在该循环中释放的化学能包括两个连续的过程：太阳能驱动甲醇在太阳能接收器-反应器中热分解，以及所得产物的合成气与空气燃烧，即甲醇分解后的间接燃烧。结果表明，在集热器温度为220°C、涡轮机进口温度为1300°C时，该循环的净太阳能发电效率可达35%，间接燃烧甲醇的火用损失比直接燃烧甲醇的火用损失低约7个百分点。本研究取得的令人鼓舞的结果表明，这种新型太阳能热发电循环可以在清洁合成燃料化学能的有效利用和电力系统中的中温太阳能热能方面取得显着改善。
In this paper, we have proposed a new solar thermal power cycle which integrates methanol decomposition and middle-temperature solar thermal energy, and investigated its features based on the principle of the cascade utilization of chemical exergy. Also, the methanol decomposition with a catalyst was experimentally studied at temperatures of 150–300°C and under atmospheric pressure. The chemical energy released by methanol fuel in this cycle consisted of two successive processes: solar energy drives the thermal decomposition of methanol in a solar receiver-reactor, and the syngas of resulting products is combusted with air, namely, indirect combustion after methanol decomposition. As a result, the net solar-to-electric efficiency of the proposed cycle could be 35% at the collector temperature of 220°C and the turbine inlet temperature of 1300°C, and the exergy loss in the indirect combustion of methanol was about 7% points lower than that in the direct combustion of methanol. The promising results obtained in this study indicated that this new solar thermal power cycle could make significant improvements both in the efficient use of the chemical energy of clean synthetic fuel and in the middle-temperature solar thermal energy in a power system.