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A novel geothermal heat pump system integrated with underground thermal storage for shifting building electric demands.

Number: No 056

Author(s) : SHI L., QU M., LIU X.

Summary

The intermittent supply of renewable power and the continuous increase of electric demands pose challenges to the stability of existing electric grids and utilization efficiency of renewable power. The thermal energy storage applied to buildings is capable of utilizing the overproduced renewable power to store thermal energy, which is later discharged to meet thermal demands of buildings when renewable power production decreases. A novel geothermal heat pump system incorporated with underground thermal energy storage was investigated through a case study of applying the proposed system to a residential building in Baltimore, Maryland. A transient one-dimensional heat transfer model of the proposed dual-purpose underground thermal battery (DPUTB) was developed and integrated with simulation models of a dual source heat pump (DSHP) and a typical residential building to form a quasi-steady-state model of the proposed system. Simulation results indicate that the proposed system can shift the building electric demand from peak hours to other times when electricity is cheap. In a cooling season, the electricity consumption during peak hours is reduced by 40% and the associated electricity cost is reduced by 20%.

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Pages: 12 p.

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  • Original title: A novel geothermal heat pump system integrated with underground thermal storage for shifting building electric demands.
  • Record ID : 30029956
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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