Heat Capacities of Four Promising Alternatives to Lithium Bromide Aqueous Solution in Absorption Refrigerators

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• 作者：Neng Gao ; Guangming Chen ; Yunyun Jiang ; Lingyun Fang ; Yijian He
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：November 14, 2013
• 年：2013
• 卷：58
• 期：11
• 页码：3155-3159
• 全文大小：251K
• 年卷期：v.58,no.11(November 14, 2013)
• ISSN：1520-5134

文摘

Properly choosing additives to conventional lithium bromide aqueous solution to improve the performance is an important part in lithium bromide absorption refrigeration studies. Mixtures consisting of lithium bromide + triethylene glycol + water, lithium bromide + propylene glycol + water, lithium bromide + sodium formate + water, and lithium bromide + potassium formate + water were thought to be four promising alternatives to lithium bromide aqueous solutions. In the study, heat capacities of the four kinds of solutions were measured using a calvet type calorimeter at temperatures from 308.15 K to 348.15 K. The experimental data were regressed using a stepwise statistical method, and the corresponding equations for each kind of solution were given. The average absolute deviations between experimental and calculated values were no more than 0.12 % for all of the systems.