利用LNG冷(火用)与工业余热的闭式Brayton循环的进一步分析

FURTHER ANALYSIS OF CLOSED BRAYTON CYCLE WITH LNG CRYOGENIC EXERGY AND WASTE HEAT UTILIZATION

以超临界状态的LNG作为冷源,以工业余热作为热源的闭式Brayton循环,可以有效的利用LNG的冷(?)并回收工业余热。本文以(?)效率为评价准则,兼顾LNG冷(?)和工业余热的利用,对该循环进行了热力学分析。在分析过程中,利用以前分析所得的结论[1],选取的循环自变量数为4,针对不同的自变量、不同的LNG冷(?)和工业余热利用情况,对多种循环方案作了进一步(考虑了循环与冷、热源的匹配)较详细的热力学分析,并得出较明确的性能表达。

A closed Brayton cycle is proposed for power generation with effective use of LNG cryogenic exergy and waste heat. Exergy efficiency is chosen to be the criteria, the match of the Brayton cycle with both LNG evaporation process and waste heat recovery are considered. Based on previous work[1], detailed thermodynamic analysis is made under different independent variables and different matches with hot and cold resources, several scenarios are analyzed and compared, explicit performance are obtained.