Analysis of the Impact of Cooling Water Inlet Temperature Changes on Energy Consumption of a Water-Cooled Centrifugal Chiller in Hotel Buildings in Bali
DOI:
https://doi.org/10.38035/gijes.v4i1.804Keywords:
Global Climate Change, Water-Cooled Chiller, Cooling Load, Energy Consumption, EfficiencyAbstract
Global climate change and the increasing energy demand in the hospitality industry have led to greater attention toward energy efficiency and resource management. In Bali, known as one of the world's most popular tourist destinations, hotel buildings rely on cooling systems to maintain guest comfort. Water-cooled centrifugal chillers are widely used in large buildings, including hotels. This study aims to analyze the effect of variations in cooling water inlet temperature on the performance of a water-cooled centrifugal chiller in a hotel building in Bali. The research object is a Mitsubishi Heavy Industries chiller with a capacity of 250 TR using R134a refrigerant. The method used is an experimental study, focusing only on the chiller unit without considering air conditioning and cooling tower performance. The results show that increasing the cooling water inlet temperature raises condenser pressure and electrical energy consumption. At a cooling load of 72%, maintaining the inlet temperature at 27.48°C (below the maximum specification limit) can save 194.4 kWh of electrical energy per day. However, if the inlet temperature reaches 32.05°C (above specifications), energy consumption increases by 199.2 kWh per day.
References
Mitsubishi Heavy Industries.2008. Operating & Maintenance Manual AART-NART Series. Japan.
Wang, S. K. (2001). Handbook of Air Conditioning and Refrigeration (2nd ed.). McGraw-Hill.
Sugarman, S.C. (2005). HVAC Fundamentals (2nd ed.). The Fairmont Press, Inc.
Lukitobudi, A.”Panduan Kuliah Sistem Refrigerasi”. Bahan Ajar Politeknik Negeri Bandung, 2010.
ASHRAE Handbook. 2005. “Fundamentals, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc”. Atlanta, ASHRAE. 1989.
Asep Rindika, Indra Saputra. “Analisa Performansi Tipe Water Cooled Chiller Centrifugal Kapasitas 2000 TR Pada Gedung Central Park Mall Jakarta Barat”. SNITT Politeknik Negeri Balikpapan, 2020.
Dossat, R.J, “Principles of Refrigeration”. Pretince Hall, 1981.
Nadia, N.”A Study Of Performance Analysis Of Fan Coil Unit System For FKM’S Air Conditioner”. Universiti Malaysia Pahang. June, 2012.
http://www.refrigerationbasics.com/ tentang Refrigeration basic II.
Arora, C. P. (2010). Refrigeration and Air Conditioning (3rd Edition). New Delhi: Tata McGraw-Hill Education.
Dossat, R. J., & Horan, T. J. (2002). Principles of Refrigeration (5th Edition). Upper Saddle River: Prentice Hall.
Trott, A. R., & Welch, T. (2000). Refrigeration and Air Conditioning (4th Edition). Oxford: Butterworth-Heinemann.
ASHRAE. (2017). ASHRAE Handbook – Fundamentals. Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
Mitsubishi Heavy Industries. Bahan Training Maintenance, 2020. 15. Mitsubishi Heavy Industries. Manual Operation, 2011.
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Copyright (c) 2026 Komarudin, Marysca Shyntia Dewi, Robinhot Limbong, Deni Prumanto, Moh. Ali Sidik, Ari Pangesti Aji
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