To fully utilize the low temperature exergy of liquid hydrogen,installed additionally in a hydrogen energy based gas turbine cycle is an air precooler and hydrogen turbine.

为充分利用液氢的低温火用，在氢能燃气轮机循环中附加一个空气冷器和氢气透平。

Thermal dynamical analysis on the calcine system of cement-precalcination kiln in Shangdong Lunan Cement Ltd.Co. was made in this paper, exergy and its analytical method were introduced.

通过对山东鲁南水泥有限公司的水泥分解窑煅的热力学分析,介绍火用的概念和火用平衡分析法。