Paper Conference

Proceedings of eSim 2006: 4th Conference of IBPSA-Canada

     

EVALUATION OF A GROUND THERMAL ENERGY STORAGE SYSTEM FOR HEATING AND COOLING OF AN EXISTING DWELLING

Wey Leong, Christopher Lawrence, Vlodek Tarnawski, Marc Rosen

Abstract: The modelling and analysis of a heat pump system for heating and cooling applications that utilizes surface ground as a thermal storage are described. The energy analysis is used to evaluate the performance of the system. The modelling efforts involve both simplified and comprehensive models. The simplified models of heating and cooling loads of a building, a heat pump unit, and heat transfer at the ground heat exchanger provide a relatively straightforward link to the comprehensive model of heat and moisture transfer in the ground, based on the finite element method. This combination of models facilitates a reasonably accurate and practical simulation tool for ground-coupled heat pump systems. The use of a horizontal ground heat exchanger (pipe) and the impact of heat deposition and extraction through it in the ground are studied. Parameters, such as length of pipe, depth of pipe and layout of pipe loop, are considered in order to achieve good thermal performance of the system and environmental sustainability of the ground. The design of a ground-coupled heat pump system for an existing residential dwelling in Ontario is used as a demonstration of the simulation tool.
Pages: 141 - 148
Paper:
esim2006_141_148