The Power Programs Catapult has launched interim information from air-source warmth pump area monitoring in the UK between November 2020 and August 2022. The figures present that warmth pumps are 3 times extra environment friendly than fuel boilers and that their median coefficient of efficiency (COP) on chilly days is 2.44, in comparison with 2.80 12 months spherical.
Air-source warmth pumps can function at excessive effectivity in chilly climate circumstances, based on real-world monitoring information from the UK-based Electrification of Warmth Demonstration Challenge.
“With the discharge of this information, we will lastly put to relaxation the concept that warmth pumps don’t work in chilly climate circumstances and that they’re ineffective in operating,” stated Marc Brown, interim enterprise chief of Power Programs Catapult. . “We noticed the precise reverse. They’re 3 times extra environment friendly than fuel boilers and work in chilly climate circumstances.
The undertaking was funded by the UK Division for Power Safety and Internet Zero, which commissioned the Power Programs Catapult, a non-profit internet zero innovation centre, to report the info. A complete of 742 air-source warmth pumps have been put in in indifferent homes, semi-detached homes, and terraced homes, in addition to flats. The age of the properties ranges from earlier than 1919 to 2001 and later.
The warmth pumps have been put in by three supply contractors – Warmworks, E.ON, and OVO Power. Their efficiency is monitored from November 2020 to August 2022, with seasonal efficiency components (SPF) reflecting their in-situ effectivity over the course of 12 months. The outcomes confirmed a median SPF of two.80 throughout warmth pump sorts, working patterns, and home sorts.
“This can be a vital enhance of round 0.3 to 0.4 (30% to 40%) for the reason that Renewable Warmth Premium Fee scheme (RHPP) warmth pump trial was carried out between 2011-14,” Power Programs Catapult stated in a press release, which refers to a The inducement scheme put in place by the UK authorities. “Innovation within the trade and within the warmth pump techniques themselves is probably going a number one issue on this efficiency enchancment.”
The figures additionally present a big variation within the efficiency of the warmth pump fashions, with the principle components being the refrigerant and circulate temperature. The median SPF for warmth pumps utilizing R32 refrigerant is 2.94, adopted by propane (R290) at 2.89, and R410a at 2.66. Their world warming potentials (GWPs) are 675, 3, and a pair of,088, respectively.
As for working temperature, the info present that warmth pumps that attain temperatures above 65 C have a median SPF between 2.89 and a pair of.92, whereas low working temperature warmth pumps have SPFs between 2.74 and a pair of.94. Nonetheless, the report states that “working above 65 C shouldn’t be a typical prevalence, with 81 of the 94 warmth pumps working above 65 C circulate temperatures in lower than 1% of time.”
The undertaking additionally assessed warmth pump efficiency throughout the coldest days of the 12 months within the UK, when the common outdoors temperature different from -5.8 C to 2 C. Their coefficient of efficiency (COP) was calculated for every of the chilly days, with a mean. at 2.44.
“This consequence reveals that warmth pumps proceed to function with excessive effectivity – offering the required warmth to properties – in a variety of properties even in chilly climate circumstances,” stated the Power Programs Catapult.
Brown concluded that warmth pumps have been proven to work.
“The UK is warmth pump prepared. Now we have to apply the learnings,” concluded Brown. “Authorities and trade should decide to investing in upgrading current installers of low-cost heating options carbon and do extra to draw new expertise to the sector.”
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