回收透平排气有效成分的功冷联产系统研究  

Analysis of a Power/Refrigeration Cogeneration System in Recovery of the Active Ingredient in the Turbine Exhaust Vapor

作　　者：陈宜[1,2] 韩巍[1,2] 孙流莉[3] 金红光[1,2] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049 [3]国家核电技术研发中心,北京102209

出　　处：《工程热物理学报》2017年第7期1503-1511,共9页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划项目(973计划)(No.2013CB228302);国家自然科学基金研究项目(No.51576191)

摘　　要：本文提出并研究了一种回收透平排气有效成分的新型功冷联产系统。该系统通过对高温高压过热氨水蒸气进行热能梯级利用和有效成分回收,实现了动力循环与制冷循环间能量和物质的双重耦合。经过部分冷凝后的透平排气中有效成分浓度明显提高,对这部分有效成分的回收可以有效增加系统制冷量。新系统等效作功效率为20.19%,比常规分产系统提高了44.32%,相对节能率为31.61%。与常规开式和常规闭式功冷联产系统相比,新系统等效作功效率提升幅度分别为7.28%和17.04%。通过研究能量传递与转换过程,阐明了系统的节能机理。新提出了平均能量品位差△A的概念,分析了系统对输入的利用情况和热力性能进一步提升的潜力。另外,还初步探索了系统中动力循环与制冷循环的耦合特性。This paper proposed and studied a power/refrigeration cogeneration system in recovery of the active ingredient in the turbine exhaust vapor.The thermal energy of the high-temperature and high-pressure ammonia-water superheated vapor is utilized in cascade and the active ingredient is recovered.In this way,the couples of energy and materials have been realized between the power generation cycle and the refrigeration cycle.The concentration of the active ingredient in the turbine exhaust vapor increases greatly after condensation,which is valuable to improve the refrigeration capacity.The equivalent heat-to-power efficiency of the proposed system is 20.19%,44.32%higher than the conventional separated system.The thermal energy saving ratio of the proposed system is as high as 31.61%.Compared with two conventional cogeneration systems,the heat-to-power efficiency of the proposed system increases 7.28%and 17.04%,respectively.The energy saving mechanism of the system has been elucidated by studying the energy transfer and conversion processes.A new concept ＂average energy level difference＂ ΔA was proposed,and has been used to analyze the utilization of the input exergy and the improvement potential of the thermodynamic performance.In addition,the coupling characteristics of the power generation cycle and the refrigeration cycle were investigated.

关 键 词：功冷联产 循环耦合 热力学分析 有效成分回收 热能梯级利用 

分 类 号：TK123[动力工程及工程热物理—工程热物理]