混合工质功冷联产循环与吸收式制冷循环的热力性能分析与比较  

Analysis of the Thermal Performance of a Hybrid Working Medium Power and Cooling Cogeneration Cycle and an Absorption Type Refrigeration Cycle and Their Comparison

作　　者：陈宜[1] 韩巍[1] 孙流莉[2] 

机构地区：[1]中国科学院大学,北京100190 [2]国家核电技术研发中心,北京102209

出　　处：《热能动力工程》2016年第11期1-6,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金研究项目(51576191);国家重点基础研究发展计划(973)(2013CB228302)

摘　　要：与传统单一吸收式制冷循环相比,混合工质功冷联产循环更有利于提高中温工业余热的利用效率,但能效提高的机理研究仍然不够深入。本研究构建了简化的氨水功冷联产循环系统和氨水吸收式制冷循环系统模型,提出了公平的比较基准,通过流程结构与热力学特性的分析和比较,揭示了混合工质功冷联产循环与吸收式制冷循环在能量转换与利用方面的差异,分析了功冷联产循环的性能提升机理。指出透平膨胀程度是影响热能在动力子循环与制冷子循环间分配比例和梯级利用程度的关键因素,并研究了其对系统性能的影响。Compared with a traditional single absorption type refrigeration cycle,a hybrid working medium power and cooling cogeneration cycle will be favorable to enhancing the utilization efficiency of the intermediate temperature waste heat from an industry,however,the study of the mechanism governing the enhancement of the performance and efficiency is still not going deep into enough. Models for a simplified ammonia-water power and cooling cogeneration cycle system and an ammonia-water absorption type refrigeration cycle system were established and a fair bench mark for comparison was proposed. Through an analysis and comparson of the flow path,structure and thermodynamic characteristics,the difference between the hybrid working medium power and cooling cogeneration cycle and absorption type refrigeration cycle in the energy conversion and utilization was revealed and the mechanism governing the enhancement in the performance of the power and cooling cogeneration cycle was also analyzed. It has been noted that the expansion extent in the turbine is a key factor influencing the proportion of the thermal energy distributed in the power sub-cycle and the refrigeration sub-cycle and the thermal energy stepped utilization extent and the influence of the thermal energy on the performance of the system was also studied.

关 键 词：功冷联产 混合工质 吸收式制冷 热力学分析 热能梯级利用 

分 类 号：TB657[一般工业技术—制冷工程] TK115[动力工程及工程热物理—热能工程]