ZnCl2/CaCl2混合盐液体除湿剂比定压热容测定  

Measurements of specific isobaric heat capacity of mixed ZnCl2/CaCl2 solute liquid desiccants

作　　者：何一坚[1,2] 蒋云云 李涛[1] 高能[1] 陈光明[1] HE Yi-jian;JIANG Yun-yun;LI Tao;GAO Neng;CHEN Guang-ming(Key Laboratory of Refrigeration and Cryogenics Technology of Zhejiang Province,Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China;Research Institute of Zhejiang University-Taizhou,Taizhou 318000,China)

机构地区：[1]浙江大学制冷与低温研究所,浙江省制冷与低温技术重点实验室,浙江杭州310027 [2]浙江大学台州研究院,浙江台州318000

出　　处：《高校化学工程学报》2020年第5期1113-1119,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家重点研发计划(2016YFB0901404);浙江省文化局(2017009);国家自然科学基金(51206140)。

摘　　要：针对亟需新型氯化锌(ZnCl2)与氯化钙(CaCl2)混合盐液体除湿剂的高精度比定压热容数据,在ZnCl2与CaCl2不同摩尔比(n(ZnCl2):n(CaCl2)=1:2、1:1和2:1)、温度范围为308.15~348.15 K、溶质的质量分数为10%~40%条件下,测定了混合盐液体除湿剂的比定压热容,得到了精度较高的ZnCl2/CaCl2混合盐液体除湿剂比定压热容经验关联式。该经验关联式与实验数据之间的平均绝对偏差为0.50%,与文献中的计算通用关联式相比,其最大绝对偏差(MAD)由9.71%降为1.79%。结果表明,该经验关联式能更好地满足工程应用上对高精度比定压热容计算的需求。In order to meet the potential demands of high-precise calculation of specific isobaric heat capacity for new mixed ZnCl2/CaCl2 solute liquid desiccants,experimental heat capacity of ZnCl2/CaCl2 with different molar ratios(n(ZnCl2):n(CaCl2)=1:2,1:1 and 2:1)was measured from 308.15 to 348.15 K with solute mass concentrations from 10%to 40%.A high-precise empirically correlated equation was obtained to calculate specific isobaric heat capacity of the mixed ZnCl2/CaCl2 solute liquid desiccants,and the average absolute deviation between the calculated and experimental results was 0.50%.Compared with general equation calculation from literature,the maximum absolute deviation(MAD)reduces from 9.71%to 1.79%.Moreover,the empirically correlated equation could better match the engineering requirements of high-precise calculation of specific isobaric heat capacity for mixed ZnCl2/CaCl2 solute liquid desiccants.

关 键 词：液体除湿剂 氯化锌 氯化钙 混合盐 比定压热容 

分 类 号：TQ132.3[化学工程—无机化工] TQ132.4