氫氣的價值除了現階段最熱門氫能議題外，在傳統製造產業鏈上，亦是不可或缺的原料，因此氫氣的運用由於上述的理由可分為兩類：能源面向及原料面向。氫氣以能源面向探討時，需注意轉換能源的過程是否耗費過多的能量，在製造氫氣時，是否反而排放更多的二氧化碳，造成更嚴重的溫室效應；將氫氣視為次級能源以及一種電池的特性；而氫氣當作原料是由於製造業的需要，大部分消耗氫氣的製程是以哈柏法製備氨氣為主的上游端。
產氫的方式有很多種，相比直接電解水耗電50~80kWh/kgH2，若銅-氯熱化學循環的熱能來源是無需計入的大量穩定熱能，且大於550度左右，以銅-氯熱化學循環產氫只需要19.7 kWh/kgH2，遠低於直接電解水之電力耗能。

Several studies of Cu-Cl thermochemical cycle for hydrogen production by using the software Aspen Plus® are in this thesis. Many researches have examined the total energy efficiency of two systems, solar power plant and nuclear power with Cu-Cl thermochemical cycle, and have investigated the experiments of the several alternative processes. By the author, the energy efficiency of producing hydrogen through Cu-Cl thermochemical cycle in various-step are found to be the range 40% to 54%. Then, choose the minimum operating process to integrate with the hybrid power system, which is the power generation system combining in SOFC and GT, and present the pinch analysis. With the exhaust gas recirculation of the successful stand-alone CHP (combined heat and power) design, we generate the hydrogen in Cu-Cl thermochemical cycle through the CHP offers the heat and electricity. Finally, the case study of Cu-Cl thermochemical cycle yield 4380 kgH2/yr in maxium hydrogen production with 375 gCO2/kWh carbon emission power generation system.

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