waste-heat utilization meaning in English

废热利用
余热利用

Thermodynamic analysis of closed brayton cycle based on integration of cryogenic exergy of lng and waste - heat utilization at the present time , much waste - heat is discharged and it is difficult to convert it into power because its temperature is not high
本论文主要内容包括： lng在超临界汽化过程中，对其冷(火用)利用方案的探索和分析；某些特殊燃气轮机热力循环的热力分析。