热化学闭路循环分解水是目前正在进行广泛研究的课题,但对于如何寻找可行的循环还没有切实可行的方法。提出了对寻找热力学可行循环非常有用的两种方法:(1)多边形表示法(向量表示法),(2)自由能—温度(△G-T)表示法,并提出了与之相应的判定规则。对一个可行的循环来说,表示循环中组元反应的多边形必须嵌套在表示总反应的多 Thermochemical closed loop decomposition of water is currently undergoing extensive research topics, but there is no practical way to find a viable cycle. Two methods that are very useful in finding a thermodynamic feasible cycle are proposed: (1) polygon representation (vector representation), (2) free energy-temperature (ΔG-T) representation, and corresponding decision rules are proposed. For a viable loop, the polygons that represent the component response in the loop must be nested within the polygons that represent the total response