A solar heat pump combines solar thermal collectors with electrical heat pump technology to provide heating and cooling by moving thermal energy between spaces. This hybrid system achieves higher seasonal performance factors (SPF) of 3.5-5.0 compared to conventional heat pumps operating alone.
Technical Details
Solar heat pumps use low-temperature collectors (20-50°C) as heat sources for air-source or ground-source heat pumps. Solar-preheated fluid reduces compressor work requirements, lowering electrical input by 20-30%. System configurations include 4-8 m² collectors, 300-500 liter thermal storage, and 5-10 kW heat pump units for residential applications. Refrigerants comply with F-Gas regulations, typically using R-410A or R-32.
Applications and Significance
Solar heat pumps suit moderate climates where both heating and cooling are required throughout the year. This integration maximizes solar collector utility by providing heating during winter and preheating during summer. Annual energy cost savings reach 40-50% compared to conventional systems. Installation costs range from 12000-20000 euros with payback periods of 8-12 years, qualifying for renewable energy incentives in EU jurisdictions.