半开式热泵干燥系统设计及性能分析  

Design and Performance of Semi-open Heat Pump Drying System

作　　者：沈锐 张巍文 刘传平 Shen Rui;Zhang Weiwen;Liu Chuanping(School of Energy and Environment Engineering,University of Science and Technology Beijing,Beijing,100083;TSS Operation,Beijing Benz Automotive Co.,Ltd.,Beijing,100176)

机构地区：[1]北京科技大学能源与环境工程学院,北京100083 [2]北京奔驰汽车有限公司技术维护运营部,北京100176

出　　处：《当代化工研究》2024年第21期178-181,共4页Modern Chemical Research

基　　金：国家重点研发计划“政府间国际科技创新合作”重点专项“农特产品低碳保质干燥技术研发”(项目编号:2022YFE0120900)。

摘　　要：热泵干燥是干燥技术中最有效的节能技术之一,然而目前热泵干燥技术还存在除湿效率不足和能耗过高等问题。为提高热泵干燥循环的除湿效率,在单循环热泵干燥系统基础上构建了双循环、双级压缩和回热式热泵干燥系统。结果表明,四种热泵干燥系统的除湿效率都随旁通比增大先增大后减小。单循环热泵干燥系统的除湿效率最低,在计算条件下,回热式热泵干燥系统在干燥温度低于75℃、湿度小于30%时除湿效率最高,而双级压缩热泵干燥系统则在高温高湿条件下除湿效率更佳。研究结果表明了热泵干燥技术的可行性,为优化热泵干燥技术提供新的途径。Heat pump drying is one of the most energy-efficient technologies in drying processes.However,the current heat pump drying technology still faces challenges such as insufficient dehumidification efficiency and high energy consumption.To improve the dehumidification efficiency of the heat pump drying cycle,this paper constructs a dual cycle,two-stage compression,and regeneration heat pump drying system based on a single cycle heat pump drying system.The results indicate that the dehumidification efficiency of all four heat pump drying systems initially increases and then decreases with the increase in bypass ratio.The dehumidification efficiency of a single cycle heat pump drying system is the lowest.Under the calculation conditions in this article,the regenerative heat pump drying system has the highest dehumidification efficiency when the drying temperature is below 75℃and the humidity is less than 30%.However,the two-stage compression heat pump drying system has better dehumidification efficiency under high temperature and high humidity conditions.The research results demonstrate the feasibility of heat pump drying technology and offer new perspectives for optimizing this technology.

关 键 词：热泵 干燥 除湿效率 旁通比 

分 类 号：TK173[动力工程及工程热物理—热能工程]