Multi-Objective Optimization of a Solar Heat Pump System Using PVT and Ice-Based Latent Storage
Abstract
This paper examines the optimization of a novel solar heat pump concept according to the competing objective functions of lifecycle energy and cost. First, the system concept is presented, combining photovoltaic/thermal collectors with ice storage and a heat pump to provide space and hot water heating. Next, the optimization methodology is discussed, including selected decision variables and optimization algorithm. Results for a high performance home in Montreal, QC, Canada, show a clear tradeoff between reduced lifecycle energy and increased costs, with the addition of PVT panels shown to be the main driver between solutions in the Pareto set. An additional case study explores the optimal balance between photovoltaic and photovoltaic/thermal collectors, and demonstrates the advantages of a properly sized system in comparison to a conventional heat pump using only photovoltaics.