Exergy and Energy Analyses of Dual-Temperature Evaporator  Split AC System Incorporated A Capillary Tube and A TwoPhase Ejector

Made Ery Arsana; I Gusti Bagus Wijaya Kusuma; Made Sucipta; I Nyoman Suamir

Authors

Made Ery Arsana Department of Mechanical Engineering of Politeknik Negeri Bali, Bukit Jimbaran, Bali, Indonesia
I Gusti Bagus Wijaya Kusuma Study Program of Doctoral Engineering Science, Faculty of Engineering, Udayana University, Denpasar City Campus, Bali, Indonesia
Made Sucipta Study Program of Doctoral Engineering Science, Faculty of Engineering, Udayana University, Denpasar City Campus, Bali, Indonesia
I Nyoman Suamir Department of Mechanical Engineering of Politeknik Negeri Bali, Bukit Jimbaran, Bali, Indonesia

Keywords:

Exergy analysis, COS-SAC system, SAC system, dualtemperature evaporator, energy performance

Abstract

This study was aimed to investigate performance of a split type air conditioning (SAC) system applying exergy destruction method. A numerical model was established based on exergy destruction analysis of a Condenser Outlet Split-Split Air Conditioning (COS?SAC) system integrated with dual-temperature evaporator and incorporated capillary tube and ejector as expansion devices. An experimental test system was also established to experimentally validate the model. Two type of refrigerants R-290 and R-22 were involved in the evaluations. The Coefficient of Performance (COP) of the ejector COS-SAC system, exergy destruction, and exergy efficiency were determined and compared with those in the SAC system utilizing capillary tube. The results showed there was a significant improvement in the overall exergy efficiency of the COS-SAC systems. The COP of the COS-SAC system was also found to be better than the COP of the SAC system.