Abstract
This article presents the investigation of the charge optimization of a split air conditioner designed for R22 but charged with R290 as an ecofriendly alternative. Initially, a baseline test was conducted with R22 as the refrigerant. R290 was then charged, and the refrigerant quantity, capillary tube, and condenser tube optimizations were done based on a simulation study while other parameters were unchanged. Experimental results show that with propane, the optimum charge quantity of 320 g (35.5%) gives a refrigerating capacity of 4.93 kW, while 4.85 kW was observed as the refrigerating capacity in the baseline test with R22.
Acknowledgment
The propane refrigerant was provided by Gesellschaft for Technische Zusammenarbeit (GTZ), India, for which the authors are grateful.