【作者】 耿春景；

【导师】 李汛；

【作者基本信息】 天津大学 ， 制冷与低温工程， 2006， 硕士

【摘要】 近年来,随着环境问题的日益严峻,溴化锂吸收式制冷机组以其节电、环保等优点引起人们越来越多的关注。由于现有的双效溴化锂吸收式制冷机组在能源的综合利用率方面还远低于电压缩式制冷机组,为了在更广阔的领域与电压缩式机组相竞争,开发高效节能的直燃型三效吸收式机组势在必然。目前,制约三效溴化锂吸收式机组发展的一个主要难题是如何解决由高温引起的高温发生器腐蚀问题。为了解决该问题,本文在前人工作的基础上进一步研究了直燃增压型三效溴化锂吸收式制冷循环。研究内容主要包括:1、采用模块化编程的方式拟合溴化锂溶液在高温区的物性参数;2、通过改变增压器位置,组建四种增压吸收式循环,并分别进行了计算机仿真模拟;3、对仿真结果进行可行性分析,从能量利用的角度对循环进行分析,提出节能建议。仿真结果表明:按传统方式设计的三效溴化锂吸收式制冷机组的COP可达1.59,比双效吸收式机组的COP数值(约1.2)高30%左右。增压型三效溴化锂吸收式机组能够保证以COP略微降低(约降低4.4%)为代价,将高温发生器的溶液出口温度由217.6℃降低到190℃以下,温降幅度明显,有效减缓了腐蚀现象。高温发生器的温降程度随增压器增压比的增加而提高。分析数据显示:在等温降条件下,Ⅰ型循环效率下降较快,Ⅲ型循环效率下降较慢。更多还原

【Abstract】 In recent years, with the depravation of environment problems, LiBr absorption refrigeration units attracts more and more people’s attention for its many merits such as electricity-saving, little environment pollution etc. The electric-compressor refrigeration units do better than double-effect LiBr absorption refrigeration units in the aspect of general energy using. In order to compete with the existing electric-compressor refrigeration units in wider space, developing triple-effect absorption refrigeration units is a general tendency.Now,the key difficulty that obstacle the development of the triple-effect absorption units is how to prevent the high temperature generator from eroding condition of GH temperature. With focus on the problem, this thesis makes a deeper research on the base of former contributions, which include three parts: 1、To programme the properties of lithium bromide-water scope at high temperatures; 2、To establish four compressor-assisted triple-effect absorption cycles and make a computer simulation; 3、To give the cycle a feasible analysis, make an exergy analysis from the aspect of energy using and provide energy saving advices.Simulation results indicate that the COP of general triple-effect absorption units can reach 1.59, which is about 30% higher than that of the double-effect units which is about 1.2. Compressor-assisted triple-effect absorption units can guarantee lower the GH temperature from 217.6℃to under190℃with a little decline of COP which is about 4.4%. The temperature decrement is distinct which extensively reduce the eroding problem. The tendency of temperature decrement becomes mores obvious as the compression ratio increases. The exergy analysis data shows that at the same temperature decrement, cycleⅠhas the highest energy loss while cycleⅢthe lowest.更多还原