Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


Hybrid solar ground-source heat pump case study using TRNSYS

Lam Dang, Wey Leong, Alan Fung

Abstract: A hybrid solar ground-source heat pump system has been designed for a residential house in Oregon, USA. Closely working with the house owner’s preferences, various designs have been considered. It was found that parallel connections of the boreholes (BHs) in the borefields were more beneficial. One reason was that the coefficients of performance (COPs) of the heat pump in parallel connections were very similar to those in serial connections (about 0.68% difference) while the parallel flows offered lower operating costs due to lower system pressure loss of ground loop. Another reason was if one BH failed in parallel connections due to fluid leakage, the other BHs still functioned while serial connections required complete shutdown of the related serial components. Moreover, the flow rate in the solar collector loop had much more impacts (about 10%) on the heat pump system COPs than the flow rate in the ground loop. Keywords: Simulation, TRNSYS, solar, ground source heat pump, design, modeling and simulation
Pages: 378 - 385