为了评价各种热能输送和转换装置的热力学完善程度,应当有统一的热经济指标。传统使用的指标是热效率,热效率是建立在热力学第一定律之上的。根据热力学第一定律,建立了热能、内能和功的平衡。功和热能之间的平衡是以功的热当量为纽带的,仅建立了数量之 In order to evaluate the degree of thermodynamic perfection of various heat transfer and conversion devices, there should be a uniform thermal economic indicator. Traditionally used indicators of thermal efficiency, thermal efficiency is based on the first law of thermodynamics. According to the first law of thermodynamics, established a balance of heat, internal energy and work. The balance between work and heat is based on the thermal equivalence of work, only the quantity is established