Owen Square Community Energy Project
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The document discusses the challenges and potential solutions for integrating heat pumps into the grid using renewable energy, specifically exploring the possibility of shifting heat pump electricity use from winter to summer. It presents a modeling approach with examples from two different community energy projects that utilize borehole heat storage systems and highlights the importance of borehole design on economic feasibility. Further research is suggested to investigate various borehole configurations for optimized grid benefits.
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Owen Square Community Energy Project
- 2. The problem with running heat pumps from renewables
- 3. The ‘holy grail’ for integrating heat pumps into the grid If we ‘spend’ 1 kWh on summer electricity can we reduce winter heat pump electricity use by 1 kWh?
- 4. CHOICES ‘timeshifts’ heat pump electricity use from winter to summer
- 6. .
- 10. Interseasonal heat storage energy centre Solar microgrid Owen Square Community Energy
- 12. CHOICES developed a TRNSYS model to answer this question
- 13. We are modelling very promising active recharge COP Scenarios 1 – 3 Illustrates increase in CoP when the same charge is spread over a longer time period (charging most efficient at low speeds)
- 14. But the max economic level of seasonal shift is limited by borehole design Owen Square park, Bristol (£168,000): ● 12 x 150m boreholes (1.8km) ● 7m distance between boreholes ● 1 u-pipe per string, 12 strings ● 50,000m3 volume ● Low temperature array ● Grid benefits: ~4500 kWh/year Braedstrup, Denmark (£188,000): ● 48 x 50m boreholes (2.4km) ● 3m distance between boreholes ● 12 u-pipes per string, 16 strings ● 19,000m3 volume ● High temperature array ● Grid benefits: Potentially much higher Similar size/cost but very different designs Further research will explore other borehole designs seeking further grid benefits