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Lower temperatures, higher heat pump efficiency A large-scale study of UK heat pump installations has revealed a major gap between hypothetical performance and real-world data. Changes to commissioning could make all the difference. pv magazine caught up with Oxford University’s Jan Rosenow and Heat Pump Monitor’s Trystan Lea to hear how installers can achieve higher seasonal performance factor (SPF) ratings for their customers.
Matthew Lynas
Jun 27, 2026
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The prospects for ultra-high-temperature heat pumps An international research team has reviewed emerging solid-state and gas-cycle heat pumps capable of reaching temperatures of up to 1,600 K, assessing their challenges, applications, scalability, and technology readiness levels. The researchers say these systems could outperform conventional high-temperature heating technologies by achieving coefficients of performance above 1.
Lior Kahana
Feb 16, 2026
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Solar seasonal storage system achieves 4.1 heat pump COP in greenhouse heating South Korean researchers have demonstrated a small-scale solar seasonal thermal storage system integrated with heat pumps for greenhouse heating over three years. The system achieved average thermal storage efficiency of 55.1%, while the dual-source heat pump recorded an average COP of 4.1.
Lior Kahana
Sep 02, 2026
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Heat pump-Carnot battery system for residential PV storage Italian researchers have developed a reversible heat pump-ORC Carnot battery that stores surplus residential PV electricity as heat and converts it back into electricity when needed. Simulations showed that optimizing the ORC expander speed could raise round-trip efficiency to 35%, while enabling the system to meet the modeled household’s daily electricity demand.
Emiliano Bellini
Aug 27, 2026
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Heat pumps are transforming domestic hot water production – How to avoid hygiene risks? Heat pumps are increasingly used for domestic hot water in Europe due to their efficiency and compatibility with solar power, but their lower operating temperatures can create conditions where Legionella pneumophila may grow if systems are poorly designed. Proper hydraulic design, temperature control, and periodic thermal disinfection ensure both high efficiency and safe, hygienic operation.
Peter Meža
Mar 12, 2026
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Heat pumps cheaper to operate than gas boilers in almost all EU countries, IEA claims Heat pumps could offer annual energy savings up to €800 ($924) in the EU, according to the International Energy Agency (IEA). But deployment is very uneven in both residential and industrial settings, which the IEA attributes to market structures and policy design, which varies from country to country.
Blathnaid O’Dea
Jun 12, 2026
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Hybrid latent-sensible storage can improve PVT-driven residential heat pump COP by 72.4% A research team in Italy developed a PVT-driven heat pump system for domestic hot water production that combines packed-bed latent heat storage with sensible thermal storage to better balance supply and demand. Their simulations showed that hybrid storage coupled with temperature-based routing significantly improves system efficiency, raising heat pump coefficient of performance and increasing renewable energy utilization.
Emiliano Bellini
May 11, 2026
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PVT-driven tower heat pump for building retrofits Researchers in China demonstrated that integrating energy tower heat pumps with evaporator-side boilers, air-source heat pumps, or solar-assisted systems can significantly improve winter heating efficiency and economic performance in commercial buildings. Among the four configurations tested, the evaporator-side boiler and solar-assisted systems delivered the highest performance and energy savings, offering a sustainable, low-carbon alternative to conventional heating.
Emiliano Bellini
Mar 24, 2026
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UK heat pump installations stall despite subsidy boost Grant funding continues but total number of retrofit heat pumps in first quarter of 2026 18% down on same period in 2025. Pace of deployment remains significantly below government’s 2030 target of 450,000 per year.
Matthew Lynas
Jun 11, 2026
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Air-source heat pumps with thermal storage cut upfront costs by 29.7% Chinese researchers have proposed combining air-source heat pumps with thermal energy storage to shift electricity consumption to off-peak periods and reduce system costs. The system cut upfront investment by 29.7%, annual electricity use by 21.9 MWh, and carbon emissions by 8.8% compared with conventional counterparts.
Lior Kahana
Aug 28, 2026
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