GROUND-SOURCE HEAT PUMP SIMULATION WITHIN AWHOLE-BUILDING ANALYSIS

摘要

This paper explores the integration of an algorithmrnfor the simulation of ground-source heat pumprnsystems into a whole-building energy analysisrnprogram.rnGS2000? is a software program released in 1995rnfor the sizing of ground source heat pump groundrnheat exchangers (also known as earth energyrnsystems, geothermal heat pumps, and Geoexchangernsystems) (Morrison, 1997). GS2000?rnperforms the ground loop heat transfer calculation,rnbut requires the monthly building loads – asrncalculated by an energy simulation program. As thernbuilding load is dependent on the size of the groundrnloop and vice versa, the aim of this project is tornincorporate the ground loop algorithms into thernESP-r/HOT3000 engine.rnDevelopment of the ESP-r/HOT3000 simulationrnengine is based upon the comprehensive andrnextensively validated simulation program, ESP-rrn(ESRU 2000). ESP-r has an extensible structurernwhereby models and algorithms can be easilyrnincorporated.rnModifying the GS2000? ground heat transferrnalgorithm, developing the water-source heat pumprnmodel accounting for part-load capacity, definingrnthe heat pump COP/EER as a function of enteringrnwater temperature including cycling effects, as wellrnas testing and validation will be examined.rnThis paper presents an account from a recent ongoingrnsoftware development project and examinesrnthe specific case of incorporating a ground-sourcernheat pump model into ESP-r/HOT3000.