EcoHome Lab: In-situ heat pump performance in the UK (tonight 6pm UK time)

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Il be listening in on this one this evening (in less than an hours time) 6pm

Colin Meek of RB&M will be presenting his latest work on UK in-situ heat pump performance. Colin’s review of the latest Ofgem Data (2017–2022) is currently pending publication by DESNZ and follows on from his previous analysis of domestic installations in over 2,000 homes (2021).

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The presentation by Colin Meek was very interesting. He will be publishing soon the results of his latest review of Ofgem data from 2017-2022. It’s surprising how low these wider study results continue to be… SPF’s around 2.7… I’m scratching my head a bit TBH!

Here’s the ASHP chart from Colin’s 2021 study:

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Colin made some important points about terminology:

  • SCOP should only be used to refer to forecasted performance, not measured performance.
  • SPF is the term to use for measured annual performance together with the boundary e.g H2/H4.

I think most of us using SCOP mean measured performance but others might think we are referring to forecasted performance by the installer or manufacturer which can obviously be quite different . I’ve never been one to be concerned about terminology but it’s probably better that we adhere to the standard use of these terms at least in the way they are use in industry technical literature.

I think the study results that Colin presents highlights the importance of what we (in a collective sense of everyone contributing) are doing with HeatpumpMonitor.org. Our results demonstrate that good installations can achieve much better results. Without that we’d have to settle with the results form these trials and it would be harder to see a path to higher performance or perhaps less abstractly, running costs lower than gas. The big question is why is there such a big difference?

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