摘要
提出了一种预冷除湿/预热再生型溶液除湿空调系统,利用热泵的低品位热能预处理溶液,同时使用温度18℃、浓度27%的低温低浓度溶液作为除湿溶液.通过实验研究了除湿侧溶液预冷、再生侧溶液预热后对系统除湿/再生性能的影响,以及系统采用低温低浓度溶液后整体性能的变化规律.结果表明:(1)随着预冷后除湿溶液温度降低,空气含湿量差和除湿效率分别提升16.3%和6.4%;随着溶液流量的提升,空气含湿量差和除湿效率分别上升22%和20%.(2)随着预热后再生温度的升高,再生量由0.132 g/s增加到0.414 g/s,再生热效率由0.196增加到了0.397.预热后再生溶液流量上升时,溶液再生量提升近13%;再生热效率提升6%左右.(3)相较于常温高浓度溶液,系统采用低温低浓度溶液后除湿能力基本不变,除湿前后空气的温降增大,运行成本降低了23%.研究结果为高温高湿地区溶液除湿系统整体性能提升提供了可行的解决方案.
In this paper,a novel precooled and preheated dehumidification air conditioning system is proposed.This system utilizes the low-grade thermal energy from a heat pump for solution preprocessing and employs a solution characterized by a temperature of 18℃and a concentration of 27%for dehumidification.Experimental investigations are conducted to assess the effects of precooling/preheating the dehumidification/regeneration liquid on the dehumidification/regeneration performance of the system.Additionally,the system’s comprehensive performance alterations post the implementation of a low-temperature and low-concentration solution are evaluated.Key findings include:(1)An decrease in temperature of the liquid desiccant after precooling results in a 16.3%rise in difference in air moisture content and a 6.4%enhancement in dehumidification efficiency.Concurrently,an escalation in the solution flow rate leads to a 22%and 20%increase in the difference in air moisture content and dehumidification efficiency,respectively.(2)An elevation in temperature of the regeneration solution increases after preheating causes the regeneration amount to surge from 0.132 g/s to 0.414 g/s,and the regeneration thermal efficiency to augment from 0.196 to 0.397.An increase in the inlet solution flow rate of the regenerator results in nearly a 13%rise in the regeneration amount of the solution and approximately 6%enhancement in regeneration thermal efficiency.(3)Relative to high-concentration solutions at ambient conditions,the dehumidification capability of the system remains largely consistent post the adoption of low-temperature and low-concentration solutions.There is a noticeable increase in the temperature differential of the air pre and post-dehumidification,which couples with a marked reduction in the operating cost.These findings provide a feasible solution for improving the overall performance of solution dehumidification systems in high-temperature and high humidity areas.
作者
刘泽霄
吴薇
翟翀
许梦杰
韩海斌
Liu Zexiao;Wu Wei;Zhai Chong;Xu Mengjie;Han Haibin(School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China)
出处
《南京师范大学学报（工程技术版）》
CAS
2024年第1期1-9,共9页
Journal of Nanjing Normal University(Engineering and Technology Edition)
基金
江苏省高等学校基础科学研究面上项目(23KJB470027)
南京师范大学引进人才科研启动基金项目(184080H201B12).
关键词
溶液除湿空调系统
预冷除湿
预热再生
热泵
低浓度溶液
solution dehumidification air conditioning system
precooling dehumidification
preheating regeneration
heat pump
low-concentration solution
