PROSPECT OF HYDROCARBON USES BASED ON EXERGY ANALYSIS IN THE VAPOR COMPRESSION REFRIGERATION SYSTEM

Abstract

This paper emphasized on the possibilities of researches
in the field of exergy analysis in various usable sectors
where vapor compression refrigeration systems are
used. Exergy losses, exergy efficiency, second law
efficiency and irreversibility of the system components
as well as of the whole system are measured. In the
vapor compression system, R134a, R290 and R600a are
considered as refrigerants. Exergy parameters in the
compressor, evaporator, condenser and expansion
devices are calculated and analyzed. Exergy losses
depend on evaporator temperatures, condensing
temperature, refrigerants and ambient temperature.
Most of the exergy losses occur in the condenser.
Expansion device has the lowest losses. Exergy
parameters are compared for different operating
temperatures. It is found that hydrocarbons (R600a)
have 50% higher exergy efficiency than R134a. Mixture
of hydrocarbons also shows the best performance based
on the exergy analysis.