Izvorni znanstveni članak
https://doi.org/10.31306/s.65.4.3
theoretical analysis of low flammable and ecological-save mixtures of liquefied petroleum gas and tetrafluoroethane as refrigerants
Bukola Olalekan Bolaji
orcid.org/0000-0003-0957-8442
; Department of Mechanical Engineering, Federal University Oye-Ekiti, PMB. 373, Oye-Ekiti, Ekiti State, Nigeria
*
Deborah Olufunke Bolaji
; Department of Mechanical Engineering, Federal University Oye-Ekiti, PMB. 373, Oye-Ekiti, Ekiti State, Nigeria
Semiu Taiwo Amosun
; Department of Mechanical and Mechatronics Engineering, Federal University, Otuoke, Bayelsa State, Nigeria
* Dopisni autor.
Sažetak
Liquefied petroleum gas (LPG), like other hydrocarbon gases, has good thermo-physical and ecological properties, but its high-flammability has limited its direct use in refrigeration applications. Therefore, this paper investigates the thermodynamic performance of low flammable and ecological-save mixtures of LPG and tetrafluoroethane refrigerant in a refrigeration system. The computational results of global warming potential (GWP) and low flammability limit shown that the blends with 50 – 90 % LPG contents have GWP below 750 and fall within the lower flammability safety class of which five were selected for further analysis. The results showed that the thermal conductivity and the refrigerating effects produced by the selected blends are greater than those of the reference refrigerant (R134a). Also, the selected blends exhibited appropriate lower pressure ratio, discharge temperature and specific power than R134a refrigerant. Four of the blends required low power input and exhibited higher coefficient of performance which are clear indication that they are more energy efficient than R134a in the refrigeration systems.
Ključne riječi
blends, ecological-save refrigerants, flammability, LPG, R134a
Hrčak ID:
312971
URI
Datum izdavanja:
3.1.2024.
Posjeta: 642 *