ATES (Aquifer Thermal Energy Storage) Heat Pump Simulations Performed with ATESSS (Aquifer Thermal Energy Storage System Simulator) Code

摘要

Modifications to the Aquifer Thermal Energy Storage System Simulator (ATESSS) allow simulation of aquifer thermal energy storage (ATES)/heat pump systems. The heat pump algorithm requires a coefficient of performance (COP) relationship of the form: COP = COP/sub base/ + alpha (T/sub ref/ /minus/ T/sub base/). Initial applications of the modified ATES code to synthetic building load data for two sizes of buildings in two US cities showed insignificant performance advantage of a series ATES heat pump system over a conventional groundwater heat pump system. The addition of algorithms for a cooling tower and solar array improved performance slightly. Small values of alpha in the COP relationship are the principal reason for the limited improvement in system performance. Future studies at Pacific Northwest Laboratory (PNL) are planned to investigate methods to increase system performance using alternative system configurations and operations scenarios. 2 refs., 3 figs., 5 tabs. (ERA citation 14:019746)