Energy is an efficient source in the present world and it is very significant. Huge
building systems such as luxury hotels, commercial complex, malls and
educational institutes require chiller plants for air-conditioning purpose in their
premises. In this paper, a case analysis on energy savings and efficiency
improvement of a chiller plant is done for a luxury hotel building located at
Chennai, Tamil Nadu, India. The building consists of carrier make 2 Nos. 633
kW/180 TR and 1 No. 1185 kW/337 TR water cooled chillers. The chiller plant
system at the site consumes up to 43% of the facility’s annual energy cost. To
increase the energy savings and efficiency of existing system and to achieve a
lower number on the Specific Power Consumption (SPC), the existing chiller
plant is retrofitted with 1 No. 879 kW/250 TR Premium efficiency chiller and an
energy analysis is done by simulating the proposed chiller using Chiller Plant
Automation (CPA) software and by understanding the energy usage of the chiller
as per the site operating load and weather conditions. With the change in chiller,
the system efficiency of the hotel increased by 40% and the energy consumption
reduced to 38%.
Keywords
Air-conditioning system, Chiller plant system, Energy efficiency, Efficiency improvement, Energy saving, Specific power consumption