Solubility of nitrogen in one-component refrigerants: Prediction by PC-SAFT EoS and a correlation of Henry's law constants

0369774 - ÚT 2012 RIV GB eng J - Journal Article
Vinš, Václav - Hrubý, Jan
Solubility of nitrogen in one-component refrigerants: Prediction by PC-SAFT EoS and a correlation of Henry's law constants.
International Journal of Refrigeration. Roč. 34, č. 8 (2011), s. 2109-2117. ISSN 0140-7007. E-ISSN 1879-2081
R&D Projects: GA AV ČR IAA200760905; GA ČR(CZ) GPP101/11/P046; GA ČR(CZ) GAP101/11/1593
Institutional research plan: CEZ:AV0Z20760514
Keywords : equation of state * nitrogen * non-condensable gas * refrigerant
Subject RIV: BJ - Thermodynamics
Impact factor: 1.817, year: 2011
http://www.sciencedirect.com/science/article/pii/S0140700711001630

Even small amount of non-condensable gas e mostly air or nitrogen e present inside a compression refrigerating circuit may decrease the efficiency of the cooling system. So far, a quantitative assessment of the effect of dissolved gases on the cooling circuit performance is hindered by unavailability of suitable thermodynamic models. In this study, we analyzed the solubility of nitrogen in the following refrigerants: hydrochlorofluorocarbons (HCFC) R22, R123, R124; hydrofluorocarbons (HFC) R23, R32, R125, R134a; perfluorocarbons (PFC) R14, R116, R218, R-3-1-10; and hydrocarbons (HC) R290, R600a. Perturbed-Chain (PC) Statistical Associating Fluid Theory (SAFT) and its modification for polar fluids PCP-SAFT were used to model the temperature dependence of the Henry’s law constant of nitrogen. A simple correlation of the Henry’s law constants valid over large temperature ranges was developed, suitable for assessment of the adverse effects of dissolved nitrogen (and approximately air) on the performance of compression cooling systems.
Permanent Link: http://hdl.handle.net/11104/0203765