Performance And Energy Analysis For Hybrid Evaporative Chiller System Controlled By Chilled Water Temperature By Heater

Tang, Hong Kwong (2017) Performance And Energy Analysis For Hybrid Evaporative Chiller System Controlled By Chilled Water Temperature By Heater. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The Hybrid Evaporative Chiller system is the new technology to replace the existing conventional chiller systems based on the AL-CO engineering letter and it is a combination of air-cooled chiller and water cooled chiller system. The Hybrid Evaporative Chiller system utilizes twin screw compressor, patented “Tube-to-Plate” evaporative condenser design and high efficiency dry evaporator. But there is lack of analysis of Hybrid Evaporative Chiller System. The chilled water temperature is one of the factor that affected the coefficient of performance and the power consumption of the conventional chiller system. By referring to the article of Energy Efficiency Manual, raising in chilled water temperature will give the better energy savings in chiller system. The purpose of this present study is to determine the coefficient of performance (COP) and energy consumption of Hybrid Evaporative Chiller System by controlled the chilled water temperature for four condition by using water heater. Another purpose is to determine the best setting of chilled water temperature with high COP and less power consumption. The 4 condition is set at this project: (1) 0 heater; (2) 1 heater, 6 kW; (3) 2 heater, 12 kW; (4) 3 heater, 18 kW. The heater is put into the buffer tank to heat the chilled water temperature. The power consumption is measured by using 3 phase power analyser. The COP is determined by using R410A manifold gauge and digital thermometer, then calculated by using R410A Mollier Chart. In conclusion, the condition 3 with 12kW of heater showed the highest COP and lower power consumption. The best setting of chilled water temperature was determined which in range of 15.6oC – 16.7oC.

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