摘要
文章针对常压运行单级太阳能蒸馏器产水效率较低的问题,提出了嵌套管回热和负压运行的改进方案。改进装置由多层圆管嵌套而成,其内部具有多个独立拱形产水腔室,在负压下运行时具有能耗低、操作维护简便、产水性能好且水质高等特点。分别于成都和西昌两地测试了装置处于95(常压),60,40,20 kPa运行压力时的产水性能,结果表明装置在西昌维持40 kPa运行时具有最优产水性能,对应单日产水量为7.2 kg/m2,性能系数为1.45,较常压运行时性能提升近一倍。此后对装置维持负压的能耗数据及产水经济性进行了评估,数据表明装置产水时维持负压能耗低于4 kJ/kg,综合产水成本约为0.1元/L,与同类太阳能蒸馏器相比具有一定优势。
Single-effect solar still operating under atmospheric pressure commonly suffers from its low yielding efficiency,therefore a modification strategy with nested heat recovery and vacuum operation was proposed.The modified still is composed of multiple nested circular tubes,whereby several independent distillation cavities with arch feature were formed.The still was characterized by low energy consumption,convenient operational maintenance and high freshwater quality.Two group of experiments for yielding performance were then conducted in Chengdu and Xichang,including operation pressures of atmospheric,60,40 and 20 kPa.The results showed that the still obtained the highest performance at 40 kPa in Xichang,corresponding to the highest daily yield of 7.2 kg/m~2 and performance ratio(PR)of 1.45 which is nearly double of PR at atmospheric test.The subsequent work concerned an economic analysis on yielding cost and energy consumption for maintaining vacuum.The results indicated that the energy consumption can be lower than 4 kJ/kg and yielding cost is approximately 0.1 yuan/L,showing certain advantages compared with other similar solar stills.
作者
谢果
魏新宇
孙泽荣
刘莹璋
Xie Guo;Wei Xinyu;Sun Zerong;Liu Yingzhang(State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China)
出处
《可再生能源》
CAS
CSCD
北大核心
2023年第11期1446-1453,共8页
Renewable Energy Resources
基金
国家自然科学基金项目(51606130)。
关键词
太阳能
蒸馏
负压
多级
solar energy
distillation
vacuum
multi-effect
作者简介
谢果(1984-),男,博士,副教授,研究方向为传热传质与太阳能利用技术。E-mail:2008xieguo@scu.edu.cn。
