APLIKASI REFRIGERAN CAMPURAN LPG/CO2 PADA SISTEM REFRIGERASI KOMPRESI UAP
Abstract: A new binary mixture
of R744 and R290 as an alternative natural refrigerant to halocarbon was
presented in this paper. Its environmental performance is friendly. It has an
ODP of zero and GWP smaller than 20. This work investigates the result of an
experimental study carried out to determine the performance of a refrigeration
system. Experimental studies for this mixture were performed on machine
installation A.C. Bench, P.A. Hilton. Ltd.. Serial No. A573/41154. LPG-CO2
mixing ratio used was 90:10; 85:15; 80:20% by mass, with the total mass of the
mixture of 300 grams.
The results showed that the increase of air velocity at the evaporator
with CO2 concentrations is constant, which is causing the increase on
refrigeration capacity. While the addition of CO2 concentration mixed
refrigerant causing decrease on refrigeration capacity. This is due to the
increasing CO2 concentration causes a decrease in enthalpy of the mixture,
which causes the refrigeration capacity is also decreased. Increased of air
flow velocity at the evaporator at a concentration of CO2 remains causing
compressor work resulting decrease. This is due to an increase in air velocity
causing an increase in temperature of the evaporator so that the required
compressor work is decrease. Increase of concentration of CO2 in the mixture
causes the compressor work increases because CO2 has a high-pressure work so
that the compression load is increasing and the compressor were employment
given compressor is also increasing. Increase of air flow rate causes the
coefficient of performance of refrigeration systems is getting increased. While
the increase in CO2 concentrations has led to the decrease of performance
coefficient
Penulis: Nasrul Ilminnafik
Kode Jurnal: jptmesindd120339
