Carbon Emissions of Chiller Systems in Hong Kong Hotels under Climate Change
Keywords:
Hotel energy simulation; Carbon emissions; Chiller system; Climate changeAbstract
Building energy simulation is a common technique to forecast
future energy use and develop strategies for meeting carbon reduction
targets. The purpose of this study is to analyze the trend of electricity
use and carbon emissions of chiller systems—the most energy intensive
type of system—using building energy simulation for hotels in sub-
tropical zones under climate change. Based on a typical meteorological
year weather file for subtropical Hong Kong, weather data were fore-
casted for climate change scenarios in 2020, 2050 and 2080. The building
simulation program EnergyPlus was used to model a reference hotel
with two typical chiller system designs. Simulation results show that a
system capacity extension by up to 5% could be considered to satisfy the
increasing cooling demand for a 15-year operating span. Various strate-
gies have been discussed for chiller systems to reduce carbon emissions
by the demand side. A rigorous carbon intensity target by power com-
panies should be in place to reduce the increasing carbon emissions by
hotels in subtropical zones.
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