Paper Conference

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


Development of a simplified model for analyzing a heating system with STES and investigation into the effects of component efficiency on economic and environmental aspects

Stuart Self, Seama Koohi-Fayegh, Marc A. Rosen, Bale V. Reddy

Abstract: The use of intermittent thermal energy sources, in combination with seasonal thermal energy storage (STES), may offer competitive heating solutions compared to conventional heating systems. Currently, influence of subsystem characteristics on overall system economic and environment aspects is not fully understood. In this study, the effects of consumer load, subsystem efficiency and thermal supply losses are investigated through parametric studies using a simplified model. The system considered includes a single residential building located in Ottawa, Ontario, with a solar thermal source, underground thermal energy storage unit and natural gas backup boiler. Overall the thermal supply piping and STES have the highest capital cost followed by the solar collectors and backup boiler. The consumer load has the greatest effect on economics and CO2 emissions. Due to high solar fraction the varying backup efficiency has little effect on system economics.
Pages: 208 - 219