换热温差对升温型吸收式热泵回收废热的影响!  

Effect of Temperature Difference on Absorption Heat Transformer about Recovering Waste Heat

作　　者：王子彪[1] 杨勃[1] 熊伟[1] 范婷婷[1] 李凤雪[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,沈阳110168

出　　处：《科学技术与工程》2015年第19期96-101,共6页Science Technology and Engineering

基　　金：国家十二五科技支撑计划项目(2012BAJ26B02);住房与城乡建设部项目(2013-K1-58);沈阳建筑大学科研项目(2013141)资助

摘　　要：以升温型溴化锂吸收式热泵系统的传热、传质平衡以及各部件的热力学关系为理论依据,建立一个回收废水热量的稳态数学模型。运用正交实验法,提出了综合考虑系统总换热面积、总循环流量和系统性能系数COP的经济参数F。阐述了系统各参数受各部件换热温差及其相互耦合作用影响的敏感度。分析了各部件换热温差对系统总面积A、总循环流量M、COP及参数F的影响。结果表明:各温差因素的耦合作用相比各温差因素对系统的影响力度要弱很多,可以忽略其作用;当蒸发温差、冷凝温差、吸收温差和发生温差分别取4℃、4℃、9℃和6℃时经济参数F值最大,为0.451 5,相应的COP为0.455。A steady state simulation model about recovering heat of waste water by using LiBr-H2O absorption heat transformer has been developed ,which is based on detailed mass and energy balances and thermodynamic relationships of the system and its components. Using orthogonal experimentaX methods, a comprehensive parameter F is put forward after taking total heat exchange area, circulation flow, COP（ coefficient of performance） into consideration. The sensitivity of all system parameters affected by temperature difference of each component and their cou- ple effect is illustrated, and the impact of each temperature difference on the total area, circulating flow, COP and index of F was analyzed. The results shows that the couple effect is much lower than the separate ones, which can be neglected, and the maximum of F is achieved when temperature difference of evaporator, condenser, absorber and generator are respectively 4 ℃ ,4 ℃,9 ℃ and 6℃ ,which is up to 0. 451 5 ,and the corresponding COP value is 0. 455

关 键 词：升温型溴化锂吸收式热泵 正交实验法 传质 传热 回收 废水热量 温差 

分 类 号：TB616[一般工业技术—制冷工程] TB65