Increasing heat pump coefficients of performance drastically increase the cost effectiveness of heat pumps. The UK has a long way to go in terms of installed performance but with increases in skills and further technical development there is room for some optimism here (1/4).
However, best performance requires low flow temperatures which requires efficient buildings and careful installs. UK experience has not been great, see @EnergySvgTrust field trials. Much of this was down to install/specification issues, not the actual appliances (2/4).
The @NatInfraCom heat modelling assumed sCOP of 2.5 reflecting prior experience. This clearly has a knock on for costs (lower COP =less heat out for your electricity in). We should be aiming for way better than that (3/4).
A bigger market, increases in skills, machine learning and remote monitoring could all help raise COPs. I'm waiting to get data for my system. Hope it's good! (4/4).
• • •
Missing some Tweet in this thread? You can try to
force a refresh
Today, just in the nick of time, the @CommonsEAC has published its report into the sustainable electrification of the economy. It's a dense report and makes a number of recommendations. It is required reading for the next government 🧵.
It's been an absolute honour for me to have been working as a specialist advisor with the EAC, a powerful cross departmental select committee, and I'm very grateful for the appointment and original proposal. There is clearly a lot that needs to be resolved.
The committee recommends a need for much clearer project management of the whole electrification issue. It's huge and it's required. A cross departmental and ongoing planning group is needed. Currently things sit badly across departments.
ICYMI, Worcester Bosch, UK's largest manufacture of gas and oil boilers last week announced a £3000 support package for heat pumps subject to the introduction of the Clean Heat Market Mechanism.
But has this company really changed course so dramatically? I think not (thread).
This company, along with the other boiler manufacturers has been against this policy from the outset. Their trade body has, and continues to call it a 'soviet style' policy.
I pointed out previously that the manufactures are playing politics with their prices, as a last ditch attempt to try and stop the scheme regulations being introduced. The manus have also bee referred to the Competition and Markets Authority on this.
This is NOT straightforward. Air to water heat pumps are much simpler from a policy perspective. Air-to-air systems are extremely heterogeneous, going from a single room unit you can buy online and plug in, to a whole house heating, cooling and hot water solution.
In the UK, where the majority of homes have wet central heating, air-to-air may only have limited value. But, we know that in markets where heat pumps have grown rapidly, air-to-air systems have played a very important role.
Heating and eating. The similarities between the two sectors and the issues at play are insane. And I'm wondering if thinking about them together can help stimulate some action🧵
Inefficient buildings losing energy = third of the food produced ending up as waste.
Decompression: Policy and regulatory options to manage the gas grid in a decarbonising UK
TLDR: As we decarbonise heating, the gas networks represent a significant liability for UK plc, and the sooner we act the better. 🧵
https://t.co/B18RRPWelXraponline.org/knowledge-cent…
For a short written version you can check out this blog I wrote for @GreenAllianceUK but the briefing is rich with detail
The problem. The @theCCCuk balanced pathway suggests just 11% of homes would have any gas connection in 2050, an 87% reduction in the scale of the gas grid. Could be less owing to limits to blue hydrogen.
Heat pumps are rightly a focus of today's progress report from @theCCCuk. The tone of the buildings chapter (5) of the report is also rightly critical as commitments and plans have not come to fruition despite the development of a heat and buildings strategy 🧵
For buildings '77% of the required emissions reduction by the Sixth Carbon Budget [2033 to 2037] period [are] judged to be either at significant risk or with insufficient plans'
Of course any further delays may the risks even higher.
There is now a huge recommendations list for buildings. All of which is clearly sensible, if you are serious about the transition to clean heating.