Clathrate hydrate dissociation conditions of refrigerants R404A, R406A, R408A and R427A: Experimental measurements and thermodynamic modeling. (November 2015)

• Record Type: Journal Article
• Authors: Hashemi, Hamed; Babaee, Saeedeh; Mohammadi, Amir H.; Naidoo, Paramespri; Ramjugernath, Deresh
• Is Part Of: Journal of chemical thermodynamics. Volume 90(2015:Nov.)
• Page Start: 193
• Page End: 198
• Publication Date: 2015-11
• Subjects: Gas hydrate -- Clathrate hydrate -- Refrigerant -- Cool storage -- Experimental -- Thermodynamic modeling; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2015.06.035
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: The application of refrigerant hydrates in cold storage systems is investigated. Hydrate dissociation conditions of various refrigerants have been measured. A correlative thermodynamic model was applied to the data. Enthalpy of dissociation for the refrigerants studied calculated. Experimental measurements performed over a wide range of pressures. Abstract: Clathrate hydrate dissociation conditions were measured for four "alternative" refrigerants, viz. R404A, R406A, R408A and R427A. The experimental measurements were performed within the pressure range of (0.079 to 9.995) MPa and temperatures ranging from (272.7 to 288.7) K. An isochoric pressure-search method was used to perform the measurements. A thermodynamic model based on the van der Waals–Platteeuw (vdW–P) model was applied for the prediction of the dissociation conditions which were compared to the experimental measurements. The fluid phase was modeled using the MHV2 G E -EoS mixing rule along with the UNIFAC (original) activity model. The van der Waals–Platteeuw (vdW–P) model was used for the modeling of the hydrate phase. There was reasonable agreement between the experimental and predicted values.