Prethodno priopćenje
PERFORMANCE STUDY OF THE ECO-FRIENDLY HYDROFLUOROOLEFINS AND DIMETHYL-ETHER REFRIGERANTS IN REFRIGERATION SYSTEMS
Bukola Olalekan Bolaji
orcid.org/0000-0003-0957-8442
; Department of Mechatronics Engineering, Federal University of Agriculture, College of Engineering, Abeokuta, Nigeria
Sažetak
This paper presents theoretical investigation of the performance of eco-friendly hydrofluoroolefins (R1234yf and R1234ze) and dimethyl-ether (RE170) refrigerants as substitutes for R134a in a standard vapour compression refrigeration system. The results showed that the vapour pressure of R1234yf and RE170 is very close to that of R134a, while the vapour pressure of R1234ze in the temperature range of -30 to 40oC deviated by 25.3% high. Very high refrigerating effect and condenser duty were obtained using RE170, which shows that it will equally excellently perform as a heat pump refrigerant. The condenser duty obtained using R1234yf and R1234ze is slightly lower, by 17.2 and 9.9%, than that of R134a, respectively. RE170 and R1234yf exhibited very close volumetric refrigerating capacity with R134a. The average coefficient of performance (COPref) obtained using RE170 is 6.2% higher than that of R134a, while the COPref obtained for R1234yf and R1234ze is slightly lower, by 6.1 and 0.9%, respectively. Generally, the performance of the three alternative refrigerants is quite similar to that of R134a, but the best overall performance is obtained using RE170.
Ključne riječi
eco-friendly; performance; alternative refrigerant; hydrofluoroolefins; dimethyl-ether
Hrčak ID:
123976
URI
Datum izdavanja:
2.7.2014.
Posjeta: 1.704 *