摘要
基于闪蒸理论,搭建了真空闪蒸制冰的实验装置。选取无机盐氯化钠溶液、有机盐甲酸钠溶液和纯水进行真空闪蒸制冰实验,获得整个制冰和融冰周期内的图像和温变曲线,比较分析了盐溶液种类、浓度对整个真空闪蒸制冰过程换热特性的影响。结果表明:纯水闪蒸结束后形成固体冰,钠盐溶液闪蒸制取的冰成流态均匀分布;钠盐溶液结冰过程维持的成冰温度低于纯水的温度,溶液储冷能力更高,成冰速度更快;浓度越高,溶液结冰过程维持的成冰温度也越高,储冷能力下降,但融冰速度较快,浓度为5%的氯化钠溶液,成冰温度最低,储冷能力最高,浓度为20%的甲酸钠溶液,储冷能力最低。
Based on the theory of flash evaporation, an experimental device for vacuum flash ice - making was built. Using the inorganic salts sodium chloride solution, organic salts sodium formate solution and distilled water was for the experiment of vacuum flash to make ice. The experiment was carried out to get the images and temperature curves during the entire ice - making and ice - melting circulation, then analyzed the effect to the heat transfer characteristics with different kind of sodium salt solution and different concentration. The results showed that it forms the ice block when using the distilled water,but when using the sodium solution, the flowed and even state of ice was formed ; The temperature of forming the flowed ice when using the sodium solution is lower than the distilled water process, so the cold storage capacity is higher, and it is quicker to form the ice; When the concentra- tion of the solution increased, the temperature of the ice forming process also increased, the cold storage capacity decreased, but the ice melting rate increased. When the concentration of the sodium chloride solution is 5% ,the temperature of the ice is the low- est, the cold storage capacity is the highest, when the concentration of the sodium formate solution is 20%, the cold storage capaci- ty is the lowest.
出处
《低温与超导》
CAS
北大核心
2016年第1期75-80,共6页
Cryogenics and Superconductivity
基金
国家自然科学基金资助项目(60572010)资助
关键词
真空
结晶
传质
相变
闪蒸
Vacuum, Crystallization, Mass transfer, Phase change, Flash
作者简介
作者简介：章学来（1964-），男，博士／教授，主要研究方向为蓄冷蓄热技术、高效太阳能利用技术、冷链物流技术、空调节能技术。
