SteamyTea Posted August 14, 2021 Share Posted August 14, 2021 Will it work this time? https://www.independent.co.uk/climate-change/news/climate-emergency-gas-boilers-cop26-b1902658.html Link to comment Share on other sites More sharing options...
Fly100 Posted August 14, 2021 Share Posted August 14, 2021 How far are we away from COP of 5 or more ? or is the Technology maxed already ? Link to comment Share on other sites More sharing options...
SteamyTea Posted August 14, 2021 Author Share Posted August 14, 2021 (edited) 12 minutes ago, Fly100 said: How far are we away from COP of 5 or more ? or is the Technology maxed already ? https://mechanicalbasics.com/reversed-carnot-cycle-process-cop-limitations/ Probably getting close in some circumstances. They can go higher than 5, but this is not really the way it should be described. They performance should be as a fraction of the Reverse Carnot Cycle. Similar to how wind turbine performance is expresses, as a fraction of Betz Limit. https://physics.stackexchange.com/questions/350074/is-there-some-theoretical-maximum-cop-for-heat-pumps-and-chillers Choice of gas is important, ideally you need to work close to either side of the critical temperature. I believe this is done in CO2 systems. Water would make a good refrigerant, except it would not work that well below 273k. Edited August 14, 2021 by SteamyTea Link to comment Share on other sites More sharing options...
nod Posted August 15, 2021 Share Posted August 15, 2021 I was chatting to the owner of a Renewable energies company who has been fitting pumps for the last twelve years Much of his business relies on grants He was quite damming about the schemes Stating that if a home is not airtight ASHPs are a waste of time and are better suited to UFH He went on to say the 2025 deadline for new builds is unlikely to be met More likely that PV and other measures would be boosted In 2008 just as the recession hit I did the plastering and render on a site of 120 homes All TF All with Hps Whilst sales of new homes dropped through the floor We couldn’t complete these fast enough All homes had a 5k grant which covered the HP cost If the government cared Why not just bring this in now on homes that have yet to be built Link to comment Share on other sites More sharing options...
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