Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12305
ชื่อเรื่อง: A study of cooling performance for chillers at HRH Princess Maha Chakri Sirindhorn Medical Center, Thailand
ผู้แต่ง: Prurapark R.
Choosarnoi C.
Plaikaeo S.
Asavaritikrai P.
วันที่เผยแพร่: 2019
บทคัดย่อ: Air conditioning system is an energy-consuming unit in most buildings. For hospitals, air conditioners are always turned on to provide reliable and continuous service for patients, leading to high amount of energy usage and great expense. In this research, chiller operations in HRH Princess Maha Chakri Sirindhorn Medical Center, Nakhon Nayok, Thailand, were investigated to determine cooling load of chillers and calculate cooling performance. Recommendations were provided to help improve chillers' efficiency and reduce energy consumption in the future. The system comprised 2 chillers, using centrifugal constant speed compressor, with the cooling capacity of 600 tons of refrigeration (TR). These chillers run simultaneously during the day while only one chiller was operated at night. Data was acquired by using internal monitoring software and external instruments which are ultrasonic flow meter, thermocouple and power meter. Results showed that the operation can be divided into 2 periods for different level of cooling loads, which are peak load hours (8 a.m.-6 p.m., 10 hours) and off-peak hours (6 p.m.-8 a.m., 14 hours). Highest cooling loads of CH1 and CH2 chillers were 478 and 438 TR respectively. The average cooling performance during peak load hours from both chillers were 0.735 and 0.967 kW/TR respectively. This indicates that the performance of the CH1 chiller was better compared with that of the CH2 chiller. In most cases, 600-ton chillers would work on part load condition, where cooling load is lower than cooling capacity, especially during the off-peak period; this makes inefficient energy consumption. Plotting results on pressure-enthalpy diagram suggested that the efficiency of chiller could be improved by lowering cooling water temperature, cleaning evaporator and condenser. Also, more energy could be saved when considering the use of variable speed drive (VSD) chiller over constant speed chiller. © 2018-2019 International Journal of Mechanical Engineering and Robotics Research.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12305
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85071751265&doi=10.18178%2fijmerr.8.5.696-701&partnerID=40&md5=887dc3ee7ae5ad5e330b55b59e7dafa0
ISSN: 22780149
Appears in Collections:Scopus 1983-2021

Files in This Item:
There are no files associated with this item.


Items in SWU repository are protected by copyright, with all rights reserved, unless otherwise indicated.