【作者】 刘国强；

【导师】 朱家玲；

【作者基本信息】 天津大学 ， 热能工程， 2007， 硕士

【摘要】 第二类吸收式热泵是一种能够回收中低温废热,从而获得高温有用热能的装置,它不需要输入高温的有用能,所以节能效果显著。利用该装置回收低温地热余热能够获得很好的节能效果。本文利用热力学、传热学原理对溴化锂第二类吸收式热泵系统进行了理论分析,对循环工质对的物性参数进行了计算,建立了系统理论循环稳态集中参数数学模型,编写了理论数学模型求解的程序,通过计算分析了主要工况参数对机组设计参数的影响。在此基础上提出了利用溴化锂第二类吸收式热泵系统回收低温地热尾水余热用于冬季供暖的方案,得出了具体的设计工况。针对利用溴化锂第二类吸收式热泵系统回收低温地热余热的方案对10kW溴化锂第二类吸收式热泵实验台系统进行了工艺设计,得到了系统实验台的具体结构参数以及具体结构形式。针对溴化锂第二类吸收式热泵系统实验台,建立了机组的仿真模型,并且对该模型进行编程求解,从而可以得到不同工况下机组的运行状况。结合系统理论模型以及仿真模型的求解程序,利用VisualC++6.0编写了溴化锂第二类吸收式热泵系统的模拟仿真软件,使对系统的分析计算更加简单化、可视化。编写了实验台的数据采集软件,为后期的实验工作奠定了良好的基础,并且为以后实验和理论分析的对比做好了充分的准备。更多还原

【Abstract】 Absorption heat transformers(AHT)are devices for increasing the temperature ofmoderately low grade waste heat to a more useful temperature level.AHT doesn’tneed high grade useful heat energy,so utilizing absorption heat transformer to recovergeothermal waste heat can be a promising method for heat recovery.In this paper,thethermodynamic cycle of the LiBr/H2O AHT system and properties of the working pair(LiBr/H2O)were studied,then a lumped parameter model of the system was set up.Acomputer program was compiled to calculate this model.By analyzing the effects ofmajor work-condition parameters on the design of the AHT system,a scheme of usingLiBr/H2O AHT system to recover geothermal waste heat for district heating in winterwas carried out.And a 10kW experimental LiBr/H2O AHT unit was designedaccording to the heat recovery scheme.Simultaneously,a numerical simulation of thedesign was carried out to predict the operating characteristics and performance of theexperimental system under different work conditions.A software was compiled tomake the analysis of the AHT system more convenient,and a software for dataacquisition of the experiment was also compiled using Visual C++6.0.The work thatthis paper had done was well prepared for the experimental works and the comparisonbetween the experiment and the theoretical analysis afterwards.更多还原