废热驱动热管溴化锂制冷机的比较

Comparison of LiBr-H_2O refrigerators driven by waste heat with heat pipes

利用热力学第一定律的热力平衡方法和热力学第二定律的火用分析方法,分别对单级单效、单级双效和两级热管废热回收双效溴化锂制冷系统的热力系数和火用效率进行比较。结果表明:不管从热经济性角度,还是从能源利用的完善性(火用效率)与合理性(能级匹配)角度,两级热管废热回收双效溴化锂制冷系统都更具合理性和实用性。

Compares thermodynamic coefficients and exergy efficiency of three different systems （single-effect LiBr-H2O refrigeration system with one-stage heat pipes, double- effect LiBr-H2O refrigeration system with one-stage heat pipes and double-effect LiBr-H2O refrigeration system with two-stage heat pipes）, by using energy equation of the first law of thermodynamics and exergy analysis of the second law of thermodynamics. The result shows that waste heat recovery of double-effect LiBr-H2O refrigeration system with two- stage heat pipes is more reasonable than the others, regardless of taking thermodynamics economy and rationality of using energy into account.