Performance Enhancement of Window-Type Air-Conditioning Units

Abstract

In this work, the performance of window-type air-conditioning units was improved. The study was achieved by adding a diffuser at the compressor outlet. An experimental investigation was carried out on 2 RT window-type air-conditioning units with controlled environmental zones. According to the compressor-outlet conditions, an ANSYS-fluent program was used to achieve a suitable diffuser geometry for maximum pressure increase. The refrigeration cycle model was programmed in Engineering Equation Solver (EES). The experimental work shows that using a diffuser of (5[Formula: see text]mm ID [Formula: see text] 9[Formula: see text]mm OD [Formula: see text] 12[Formula: see text]mm L) in an air-conditioning system will decrease the required compressor pressure ratio by 6% from the base case with an overall pressure increase of 1.4 bar and a 29% COP increase from the base case[Formula: see text]

Experimental Evaluation of Air-Conditioning System

“…The researchers affirmed that the cooling capacity and coefficient of performance for cooling of the former air-conditioning system tested were up to 6.4 kW and 2.5 better performances than the later respectively. Ali (2018aAli ( & 2018b declared from its experimental investigation and performance enhancements on window type air-conditioning system with three capillary tubes with using of diffuser. It was affirmed that system with three capillary tubes had the highest COP from all other tested capillary tubes number with 14% increasing and overall pressure increased by 1.4 bar and 29 % COP increase from the base case of two tubes respectively.…”