—In this study, an elevator air conditioning (EAC)
prototype, designed and manufactured at a factory located in
Izmir, Turkey, is considered to assess its performance using
exergy analysis method. The analyses performed include two
various refrigerants, namely R-134a and R-1234yf. The
maximum improvement potential is found to be in the
condenser for R-134a, while it is in the compressor for R-1234yf.
The COP values are determined to be 2.550 and 2.33, while the
product/fuel based exergy efficiencies are determined to be
58.72% and 57.39% for R-134a and R-1234yf, respectively. The
biggest irreversibility occurred in the compressor for both
refrigerants. The exergy loss and flow diagram (the so-called
Grassmann diagram) is also presented for the EAC studied to
give quantitative information regarding the proportion of the
exergy input that is dissipated in the various system
—Elevator air conditioning, exergy analysis,
M. Araz and A. Hepbasli are with the Department of Energy Systems
Engineering, Yasar University, 35100 Bornova, İzmir, Turkey (e-mail:
A. Güngör is with the Department of Mechanical Engineering, Ege
University, 35100 Bornova, İzmir, Turkey (e-mail: firstname.lastname@example.org).
Cite: M. Araz, A. Güngör, and A. Hepbasli, "Experimental Exergetic Performance Evaluation of an
Elevator Air Conditioner Using R-1234yf," International Journal of Engineering and Technology vol. 7, no. 3, pp. 254-260, 2015.