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Design and operational optimisation of an integrated thermal energy storage ground-source heat pump with time-varying electricity prices.

Number: 0715

Author(s) : SAPIN P., OLYMPIOS A. V., MERSCH M., MARKIDES C. N.

Summary

A detailed methodology is proposed to design and optimise the operation of a ground-source heat pump (GSHP) coupled to a phase-change material (PCM) thermal battery. The objective is to minimise the cost of supplying space heating and hot water to a medium-demand house in the UK during a typical winter day with fluctuating electricity prices. A bespoke 8-kW GSHP is designed and used to optimise the charging schedule of the thermal battery to minimise daily operational costs while meeting the heat demand. If no limit is imposed on the size of the thermal battery, in the best scenario, a 41-kWh thermal battery is required to achieve costs as low as 1.85 £/day. However, large PCM batteries mean high upfront costs and little space restrictions. Therefore, a constraint is imposed on the thermal store capacity to identify the optimal trade-off that can be achieved between PCM battery size and daily power consumption costs. Operational costs strongly depend on the battery size, increasing from 1.85 £/day for a 41-kWh thermal battery to 3.50 £/day for a 6.3-kWh store.

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Pages: 10 p.

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Details

  • Original title: Design and operational optimisation of an integrated thermal energy storage ground-source heat pump with time-varying electricity prices.
  • Record ID : 30033476
  • Languages: English
  • Subject: Figures, economy
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05

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