Paper Conference

Proceedings of uSim Conference 2022: 3rd uSim Conference of IBPSA-Scotland

     

MODELLING AIR-SOURCE HEAT PUMPS IN COLD CLIMATIC CONDITIONS CONSIDERING THE EFFECTS OF FROSTING

Siddhartha Gollamudi, Easwaran Krishnan, Hadi Ramin, Gurubalan Annadurai, Carey Simonson

Abstract: The world is fastly adopting building electrification to reduce buildings' greenhouse gas (GHG) emissions. Air Source Heat Pumps (ASHPs) are cleaner and more efficient than fossil fuel-based systems like furnaces and boilers for heating buildings. The performance of ASHP is highly dependent on climatic conditions(i.e. ambient temperature and humidity). When the ambient air temperature drops below the sub-zero region, ASHPs face the problems of frosting and high compression ratios. The present study investigates the effects of such issues on the performance of an ASHP in Saskatoon, Canada. The performance of the ASHP is presented in terms of the Coefficient of Performance (COP), and the effects of condensation temperature and frosting on COP are investigated. It is observed that the COP drops with the decrease in ambient air temperature. Furthermore, an increase in condensation temperature limits the operating range of an ASHP. The greenhouse gas (GHG) emissions from ASHP are compared with natural gas heating to determine the environmental impact.
Paper:
usim2022_p108