Energy Efficiency and Safety for Wall Type Air Conditioner with Propane Refrigerant

9th Thai Society of Mechanical Engineers, International Conference on Mechanical Engineering

Traivivatana, S.^1 ; Yongchareon, W.^2

Energy Research Institute, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok

10330, Thailand^1

Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok

10330, Thailand^2

关键词: Alternative refrigerant;    Condensation temperature;    Cooling Capacity;    Evaporation temperature;    Floor areas;    Floor level;    Global issues;    Global warming potential;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/501/1/012049/pdf
DOI  :  10.1088/1757-899X/501/1/012049

来源: IOP

【 摘 要 】

Thailand has been used the R-32 refrigerant in air conditioner since 2016, while it has high global warming potentials (GWP = 675). A propane refrigerant (R-290) is introduced as a newly alternative refrigerant, due to the global issue on refrigerant substitution for friendly environment. It has GWP of 4, which is 169 times lower than R-32. In this study, the theoretical energy efficiency was analysed under the Thailand's conditions at the saturated evaporation temperature of 10°C and the saturated condensation temperature of 47°C. However, the propane is highly flammable; therefore, the safety must be considered. The results showed that the coefficient of performance of propane was 5.54, which was 7% higher than R-32. The wall type air conditioner with propane refrigerant would be safe from fire if it was installed at a height higher than 1.8 m above the floor level and the floor area was larger than 17 and 23 m2 for air conditioner cooling capacity of 3375 W and 5000 W, respectively.