太阳能除湿系统中混合盐溶液的除湿/再生效率  

Dehumidification and regeneration efficiency of the mixed salt solution in the solar dehumidification system

作　　者：丁涛[1,2] 黄之栋[1,2] 赵伟金 李保明[1,2] 

机构地区：[1]中国农业大学水利土木工程学院,北京100083 [2]农业部设施农业工程重点开放实验室,北京100083 [3]浙江天喜实业集团公司,丽水321400

出　　处：《农业工程学报》2010年第2期295-299,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：十一五科技支撑计划课题"资源节约关键技术标准研制"(2006BAK04A03);浙江省科技厅高新技术及产业化项目资助(2009C11SAB50011)

摘　　要：太阳能混合盐溶液除湿技术,是工农业生产中空气除湿降温的关键技术难题,而系统的除湿/再生效率又是整个系统的核心问题。该文利用已建立的太阳能混合盐溶液(CaCl2和LiCl)除湿/再生试验台,测量并分析了除湿器进、出口空气的含湿量与除湿效率的计算关系;研究了再生热源温度与再生量、扩散系数以及再生效率的关系。结果表明:随着太阳能集热器热源温度的升高,再生量、扩散系数、再生效率三者都会相应的升高。当再生热源的温度为104℃时,再生空气含湿量的增量可以达到10g/kg,扩散系数最高可到0.277cm2/s,再生效率为55%;但是当热源温度低于50℃时,系统将无法再生,因此太阳能混合盐溶液除湿系统的有效再生热源温度不低于70℃。根据Chung提出的除湿效率计算模型,得到了太阳能混合盐溶液除湿系统叉流绝热型除湿器的除湿效率公式并得到了验证,经过计算叉流绝热型除湿器的除湿效率为56.8%。该研究为温室等设施除湿技术提供了研究基础。The technology of liquid desiccant and solar regeneration is the key technical problems of evaporative cooling in high temperature and humidity region, and the most important thing is the dehumidification/regeneration efficiency. The calculating relationship between the humidity content of in/out air and dehumidification efficiency was established through the experimental measurement. And the relationships of temperature of regeneration heat source to regeneration quality, diffusion coefficient and regeneration efficiency were researched. The results showed that with the regeneration temperature increasing, the regeneration quality, diffusion coefficient and regeneration efficiency were rising. When the regeneration temperature was 104℃, the regeneration quality was 10 g/kg, diffusion coefficient 0.277 cm^2/s, and regeneration efficiency 55%. But when the regeneration temperature was lower 50℃, the regeneration cannot work. So the effective temperature regeneration was at least 70 ℃ in solar energy mixed solution dehumidification system. Based on the Chung model, the calculation formula of dehumidification efficiency in the multistage cross flow dehumidifier was established for the solar energy dehumidification system, and the dehumidification efficiency was 56.8%.This research for greenhouse facilities dehumidifying technology provides a study basic.

关 键 词：太阳能 温度 效率 再生 除湿效率 

分 类 号：S625[农业科学—园艺学]