【作者】 马庸颇；

【导师】 赵宗昌；

【作者基本信息】 大连理工大学 ， 化学工程， 2004， 硕士

【摘要】 当今，保护人类环境和回收生产排放的废弃能量对于人们来说越来越重要。吸收式热泵技术是解决这两大难题的最为有效的手段之一，它节能的同时又实现了环保。特别是应用溴化锂/水溶液作为工质的第Ⅱ类吸收式热泵（AHT），应用极为广泛。这种节能装置的应用，不仅大量以水或蒸汽存在的废热得以重新利用，而且向环境排放的热污染也得到了降低。单级吸收式热变换器已经获得较为广泛的工业应用，但由于其温升只有30℃左右，在一些需要大温升的场合，其应用受到限制，双吸收热变换器（DAHT）是一种可实现60℃以上的温升的新型吸收热变换器。近年来受到人们极大关注。 本文以热力学第一、第二定律为基础，通过建立系统的质量守恒、热量守恒方程，并利用工质的热力学性能数据，对双吸收热变换器（DAHT）的热力循环过程和经济性能进行了理论分析和性能优化。并编译了一系列描述和模拟其溶液热力学循环的计算机程序和子程序，利用该计算机程序模拟和优化的计算数据结果，做了一系列的分析图表。同时，运用这些运算结果，讨论了在各种工作条件下，系统的操作参数，如：冷凝温度（T_C）、蒸发温度（T_E）、吸收温度(T_AB)和发生温度（T_G）对性能系数（COP），（火用）效率（ECOP），新性能参数（COP·ΔT）、新（?）参数（ECOP·ΔT）和（火用）指标（EI）等的影响规律。 最后，用约束条件下N维极值的复形调优法对该DAHT热力过程的总经济收益（EP）进行调优，经济性能分析结果表明，当系统的操作条件为：冷凝温度在20.35℃，蒸发温度在73.05℃，吸收温度在129.52℃，总收益达最佳。更多还原

【Abstract】 It becomes more and more important to reuse industrial waste energy and to protect human environment now. The technology of absorption heat transformer (AHT) is one of the most effective ways to simutenaeously solve these two proposed problems especially using lithium bromide-water solution as working fluid. Not only can a large quantity of waste heat in the form of hot water or steam be reused, but also the thermal pollution discharged to the enviroment will decrease if this saving energy device is applied. The single AHT has been applied widely in the past years. Due to its temperature-upgrade is only about 30C, its application is limited in some cases which need large temperature-upgrade. Double AHT (DAHT) is a new type of AHT which can realize more than 60C temperature-upgrade. As a result, much more attention is payed to the later one in very recent years.In this paper, based on the first and the second law of thermodynamics, the thermodynamic circuit process performance as well as the economic benefit of the double absorption heat transformer (DAHT) is analyzed and optimized theoretically in detail by introducing a set of mass conservation, heat conservation equations and some thermodynamic data of the lithium bromide-water solution. Furthermore, in order to simulate and optimize both the thermodynamic performance and economic profit of the DAHT, a coumputer program and its subroutines describing and simulating the solution thermodynamic circuit of the DAHT are coded. The simulating and optimizing results caculated by the computer programs are illustrated graphically in a series of analytical diagrams. At the same time, these results are used to discuss, under various working conditions, the influence of the change of some operating parameters such as the temperature of condenser (7c), evaporator (Te), absorber (Tab), generator (Tg) on the coefficient of performance (COP), the exergy coefficient of performance (ECOP), the new coefficient of performance (COP-AT), the new exergy coefficient of performance (ECOP T) and the index of exergy (El). The laws of their change also have been demonstrated.Finally, the total economic profit (EP) of the thermodynamic precess of this type of DAHT is optimized by using a restricting complex method of N dimensions. The optimizing results caculated are presented in a table. Consequently, when Tc is 20.35C, TE is 73.05C and Tab is 129.52C, the total economic profit will attain the optimal value.更多还原