SET Proceedings 2978-4387 Caravel Press 10.65582/set.2010.070 2010.070 Simulation Modeling and Design Optimization of Vertical Ground Heat Exchanger-GEOSTAR Program CuiP. sdcuiping@gmail.com DiaoN.R. YangH.X. FangZ.H. School of Thermal Energy Engineering, Shandong Jianzhu University, China Key Laboratory of Building Energy-saving Technique of Shandong, China Department of Building Services Engineering The Hong Kong Polytechnic University, Hong Kong, China 24082010 9 978-1-995850-04-7 1 9 24 August 2010 © 2010 Copyright WSSET 2010

This paper presents the analytical heat transfer models for the vertical ground heat exchangers (GHEs) and the attendant program named “GEOSTAR” developed for use in design and simulation of vertical GHEs. The program used spatial superposition for multiple boreholes and sequential temporal superposition principles to account for time-varying loads. The Dest program for simulation of the building heating and cooling loads has been incorporated into the GEOSTAR. Coupled with the models of the heat pump and building loads, the GEOSTAR can predict time-varying heat pump energy consumption, heat transfer rates of GHEs, and other variables of interest. Finally, the program is applied to design an existing GCHP project and to simulate the system performance. The results demonstrate the usefulness of the simulation model and attendant program as a tool for designing the GCHP systems.

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