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

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QUANTIFYING THE ENERGY IMPACT OF A VARIABLE FLOW PUMP IN A GROUND-COUPLED HEAT PUMP SYSTEM

Krassimira Iolova, Michel Bernier, Laurier Nichols

Abstract: This article presents the results of a case study aimed at quantifying the energy impact of replacing a constantspeed pump with a pump driven by a variable frequency drive in a ground-coupled heat pump (GCHP) system. The system is installed in a public high school located in St-Constant near Montréal. Performance data collected from an on-site energy management system indicates that the annual energy consumption of the heat pumps represented 33% (63700 kWh) of the total energy consumption of the school while the circulating pump consumed 7.1% (13702 kWh). This performance data was used to validate the energy simulations which were performed using TRNSYS 15. Simulations with variable-flow pumping indicate that pumping energy consumption is reduced by about 82% while the total (circulating pump + heat pumps) energy consumption is reduced by 18.5%.
Pages: 149 - 156
Paper:
esim2006_149_156