Correlating saturated-liquid heat capacities
- Georgia Inst. of Tech., Atlanta, GA (United States). School of Chemical Engineering
The calculation of heat capacities of saturated liquids is an important step in the design of many unit operations. While equations for estimating liquid heat capacities already exist, many of these expressions are simple polynomials that are somewhat inflexible and only accurate over relatively small temperature intervals. Also, polynomial correlations for the heat capacities of saturated liquids yield incorrect predictions of fluid behavior near the critical temperature, and generally involve three or more adjustable parameters. A model is presented which proves a simple, yet accurate, method for estimating the heat capacities of saturated liquids. The details of the model, along with model parameters for 31 common refrigerants, were summarized earlier in a cited reference. Here the authors present parameters for fitting experimental heat-capacity data for 134 pure chemicals. In every case, they have been able to accurately predict heat capacity over the entire composition range for which data are available, using only two adjustable parameters.
- OSTI ID:
- 110157
- Journal Information:
- Chemical Engineering, Journal Name: Chemical Engineering Journal Issue: 9 Vol. 102; ISSN 0009-2460; ISSN CHEEA3
- Country of Publication:
- United States
- Language:
- English
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