气体液化理论最小功与过程无关的一种严格证明方法

A Strict Method for Proving That The Theoretically Minimum Work of Liquefying Gases is Irrelative to Processes

国内一些关于低温原理的教材中,在推导气体液化的理论最小功时,往往只选取了一条或两条特定的热力过程,由此得出"气体液化的理论最小功与过程无关"的结论,这在理论上不够严格。选择任意的可逆过程使气体液化,在理论上更严格地证明了上述结论。

In some domestic textbooks on the principal of cryogenics, when the theoretically minimum work for liquefying gases was deduced, usually only one or two processes were considered, then a conclusion was drawn that the theoretically minimum work was irrelative to processes. This proving method is not very rigorous. In this paper, an arbitrary process is chosen to liquefy gases, thus the above conclusion is strictly proved.