Abstract
Internal Heat Exchanger (IHX) in vapor compression refrigeration cycle is an alternative to improve the energy performance in refrigeration systems. In this paper, the influence of IHX on thermal behavior of a chest freezer is evaluated experimentally. For the study, R-513A is used as replacement refrigerant of R-134a. Results indicate that the optimal refrigerant mass is less for the R-513A than R-134a under the same operating conditions. When R-513A is used as refrigerant, a reduction of 6.25% in refrigerant mass in comparison with the R-134a refrigerant is achieved. Also, it is found that the stability time in the indoor compartment is reduced by 2 and 4 h when the R-513A was used in comparison with the R-134a with and without IHX, respectively. Finally, energy consumption for R-134a is 8% higher for 24-h energy consumption test, in comparison with R-513A.
NSTL
Elsevier