This paper investigates the feasibility of hydrocarbon refrigerant mixtures as a replacement for HCFC-22 in residential air-conditioning and heat pump systems. The COP and the seasonal performance factor (SPF) were calculated using a UA-model for single component refrigerants and refrigerant mixtures. Simulations were run for pure propane and the mixtures of propane/i-pentane, propane/n-butane,...

The experimental investigation of applying refrigerant Rl52a and zeotropes RI52al R22, Rl52al R221 Rl 14 to replacing refrigerant Rl2 is reported in this paper. The operating characteristics have been gotten using R 12, R I S2a, R ISia I R22 and R I 52a I R22 I R I 14 in the household refrigerator. The experimental results have been analysed. It is known that the·energy consumption of the refri...

An expander is employed to replace a throttling valve in a heat pump system of the convention order to further improve the efficiency of the system by recovering partial expansion work to dec consume of the system. Due to large expansion ratios of conventional refrigerants, a tw one-stage expand total losses, which are th efficiency efficiently.

A built experimental set-up was employed for the estimation of the solid-liquid equilibria of alternative refrigerants systems. The behavior of carbon dioxide + 1,3,3,3-tetrafluoropropene (CO2 + R1234ze(E)) was measured down to temperatures of 160.0 K. The results obtained for the mixtures were interpreted by means of the Schröder equation.