低温余热/电联合驱动的双级溶液除湿系统热力性能研究  

Performance Analysis of a Two-Stage Liquid Desiccant Dehumidification System Driven by Low Temperature Heat and Electricity

作　　者：苏博生 韩巍[1] 

机构地区：[1]中国科学院工程热物理研究所,分布式冷热电联供系统北京市重点实验室,北京100190 [2]中国科学院大学,北京100190

出　　处：《工程热物理学报》2016年第11期2296-2302,共7页Journal of Engineering Thermophysics

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

摘　　要：空气除湿广泛应用于工业干燥和建筑的暖通空调领域,表冷除湿和溶液除湿方法消耗大量电能,节能潜力很大,受到广泛重视。本文提出一种低温余热和电驱动的双级溶液除湿系统,低温余热通过再生器将稀溶液转换成浓溶液,浓溶液在第一级除湿器完成空气的初步除湿,中等浓溶液经过电压缩制冷机组降温并提高吸收能力后,进入第二级除湿器进行深度除湿。双级溶液除湿系统与表冷除湿系统相比,耗电量减少21.29%,双级溶液除湿系统消耗的余热的折合发电效率可达到2.11%。通过对双级溶液除湿系统以及参比系统进行平衡分析,揭示了双级溶液除湿系统节能的主要原因。本研究为低温余热高效利用,减少电力消耗提供一种新型技术方案。A two-stage liquid desiccant dehumidification system driven by both heat and power is proposed to perform depth dehumidification. The proposed system comprises a regeneration unit powered by the low-temperature heat source and a two-stage dehumidification unit, where air moisture load is preliminarily removed by lithium chloride cooled by the environment cooling water and then deeply removed by lithium chloride cooled by compression refrigeration equipment driven by power. Simulation results showed that the power consumption reduced by 21.29% and the reduced power generation efficiency can reach 2.11%. Furthermore, the energy saving mechanism of the proposed system was elucidated by means of an exergy analysis. This study may provide a new way to perform depth dehumidification by efficiently using a low-temperature energy and reducing power consumption.

关 键 词：余热利用 溶液除湿 节能性 分析 

分 类 号：TU831.5[建筑科学—供热、供燃气、通风及空调工程]