Increasing Wind Power Utilization Using Electric Heat Pumps For Domestic Hot Water, Thermal Storage And Space Heating
Although wind power is a renewable resource available in many parts of the country, it is intermittent and not typically aligned with electricity demands. As such, large-scale energy storage is generally required to improve the utilization of the wind-generated electricity. Traditional energy storage technologies are expensive and require space, a premium in New York City. Strategies to better align supply and demand profiles and to reduce the need for additional storage are desired. A mathematical model was developed to evaluate the effects of coupling large-scale wind power installations with increased use of electric heat pumps to meet a portion of domestic hot water (DHW) demand. Further, the DHW tank provides a potential energy storage medium when wind-generated electricity exceeds demand. Annual wind energy utilization rates and unit cost reductions were calculated for various wind power capacities and levels of DHW heat pump usage. The effects of using electric heat pumps for space heating were also evaluated in combination with various levels of DHW heat pump penetration.