Air Conditioning System Performance of a City Hotel Appraised for Energy Use Efficiency

Abstract

This paper presents results of a study on the performance of split air conditioning (AC) and overall energy consumption of a city hotel in Bali, Indonesia. The study applied a practical global approach to appraising energy performance of the AC system, overall electrical energy consumption of the hotel and frequent compressor damage as the impact of installation methods of the existing AC systems. The results obtained indicate that improper AC system installation method can reduce their energy performance which include COP (coefficient of performance), EER (energy efficiency ratio), and SEI (system efficiency index). The finding also shows improper installation method can cause enormous compressor damage. Within three years, as many as 54 compressors from 90 existing AC system in a particular building were damaged. Overall number of compressors that have been faulty in that period can reach 76 units accounted for about 23.1% of the total AC systems installed in the hotel. It is also found there is a reduction on AC system cooling capacity.