Quantification and Communication of Efficiency and Cost Benefits from Additional Cooling in Geothermal Probe Systems (QuKEE)

Expert report on the quantification and communication of efficiency and cost benefits from additional cooling in geothermal probe systems (QuKEE): Model-based analysis of cost advantages through regeneration and heat storage for typical heating and cooling applications, prepared for various target groups. The model considers building and usage profiles, probe field, subsurface, and regeneration options, calculates energy efficiency, final energy, total and production costs, and presents savings potentials. Model boundary conditions are to be practical, with at least three support points for parameter variations, and cover scales from single-family homes to district level. Comparison of three operating modes (pure heating operation without regeneration, partial regeneration through passive cooling, balanced operation with additional heat sources like solar thermal) regarding electricity consumption, seasonal performance factor, drilling meter requirements, area requirements, investment and operating costs. Comparison with alternative solutions such as air-source heat pumps with active cooling and conventional cooling technology. The results are to be prepared for municipal heat planning, district development, public utilities, housing industry, energy consulting, specialized planning, and end customers. Development of target group-specific communication concepts as the core of the report, including recommendations for optimizing the design of ground source heat pump systems and establishing subsurface regeneration as a standard.

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