Paper Conference

Proceedings of eSim 2008: 5th Conference of IBPSA-Canada

     

FEASIBILITY ANALYSIS OF DOMESTIC HOT WATER SYSTEMS USING TRNSYS

Gurjot Gill, Alan Fung

Abstract: The heating of water for domestic uses presently accounts for 24 percent of Canadian residential energy consumption and 25 percent of Canadian residential greenhouse gases (GHG) emissions (Natural Resources Canada, 2006). The objective of this paper is to simulate different domestic hot water (DHW) systems to study their fuel consumptions, GHG emissions and 30-year lifecycle costs. Using TRNSYS simulation model, tests are performed for seventeen different DHW systems. These systems include two panel solar-based systems with electric and gas back up tanks, modulating gas combo boiler, ondemand gas water heater, and as well as conventional electric and gas hot water tanks. Results showed that DHW system with solar pre heat and electrical secondary with timers is the best system for energy consumption and GHG emissions. It uses 1.22 MWh of electricity and produces 266 kg of GHG emissions. DHW system with High efficiency on demand modulating gas combo boiler with gray water heat recovery is the best system in terms 30-year life cycle cost ($12,332).
Pages: 189 - 196
Paper:
esim2008_189_196