Paper Conference

Proceedings of eSim 2020: 11th Conference of IBPSA-Canada


Simulation-based Assessment of Air-Source Heat Pump Sizing Using Enhanced Component Model

Solange Prud'homme 1, Stéphanie Breton 1, Justin Tamasauskas 1, Jeremy Sager 2
1 CanmetENERGY in Varennes, Natural Resources Canada, Canada
2 CanmetENERGY in Ottawa, Natural Resources Canada, Canada

Abstract: Appropriate system sizing is critical in order to maximize the vast energy savings potential of air-source heat pump systems. However, proper system sizing is often highly dependent on a number of factors, including climate, building loads, and the performance characteristics of the heat pump. Using Natural Resources Canada’s Air-Source Heat Pump Sizing and Selection Guide, this paper presents a simulationbased approach to explore the energy performance impacts of four different sizing methods in 1990s single-family Canadian housing. An enhanced data-driven heat pump model, capturing performance variations with compressor speed and key short-term characteristics such as defrost, is used as a base for analysis. Annual simulation results demonstrate the strong energy savings potential of heat pumps, and the performance pitfalls of oversizing. The impact of key assumptions, including performance data and load calculations, are also discussed.