Jan Rosenow Profile picture
Jul 5, 2021 8 tweets 4 min read Read on X
Excellent piece by ⁦⁦@EmilyBeament⁩ on how the UK can turn from laggard to leader in clean heating.

THREAD 1/n standard.co.uk/news/uk/govern…
2/n The UK has committed itself to installing 600,000 heat pumps every year by 2028. To meet the target the installation rate needs to increase 25-fold. Here's how to achieve this.
3/n Existing policy is insufficient to deliver on the target and falls short by close to 50%. The gap is even larger to the @theCCCuk trajectory required for net zero.
4/n We will need a policy package consisting of 4 elements:

1) financial support especially for low-income households
2 structural reform of bills and stamp duty
3) regulatory backstop in early 2030s
4) all of this underpinned by robust governance framework
5/n A modest carbon tax of £50/t CO2 on heating fuels would be sufficient to fund the required heat pump uptake with subsidies tapering off over time as equipment costs fall.
6/n Levies and taxes on electricity versus gas need structural reform. The current set-up disincentives switching to heat pumps.
7/n Finally, a regulatory backstop in the early 2030s similar to petrol and diesel cars will provide the market with certainty and ensure we meet net zero.
8/n You can find more details on how to design a policy package for a heat pump mass market in our @RegAssistProj @e3g report coauthored by me with @heatpolicyrich @enfinnEU. raponline.org/knowledge-cent…

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More from @janrosenow

Sep 12
"Why are electricity prices so high if renewables break generation records and are so cheap?" I have been asked.

The main reason: Gas still sets the price 63% of the time in wholesale electricity markets in EU27 & >90% in some countries.

The graphic is from the Draghi Report. Image
For those wanting to understand why the most expensive generator dispatched sets the price I highly recommend this explainer by @LionHirth hertie-school.org/en/news/detail…
The same issue is also very prevalent in the UK market as recent @UCL_Energy analysis shows.

ucl.ac.uk/bartlett/susta…
Read 4 tweets
Aug 31
I love it when "experts" like Richard make sweeping claims that more wind and solar will result in more outages without ever looking at the real data.

Here's the data for Germany:

Wind + solar had a share of 33% of electricity in 2022. ➡️But there were 43% FEWER interruptions than in 2006 when wind + solar contributed only 5%.Image
1/ This is no different for other countries. Here's data from @CEERenergy on the minutes of interruptions per customer per year (SAIDI). Whilst wind and solar have seen record growth in Europe customer DO NOT experience more interruptions. ceer.eu/publication/7t…Image
2/ James Glennie also plotted grid reliability vs. wind & solar penetration in Europe and the US.

I struggle to see that places with a lot of wind and solar have more outages.

Why? Because the data doesn't show that. There simply is no correlation between grid outages and the share of wind and solar.

Image
Image
Read 4 tweets
Jun 25
NEW RESEARCH: What do we do with the gas grid when gas demand drops?

A new regulatory approach is urgently needed to ensure costs for gas grid do not spiral out of control.

@RegAssistProj @heatpolicyrich @CKemfert

Free copy here 👇


Key findings in 🧵. authors.elsevier.com/a/1jJcf9C%7EIu…
Image
1/ Modelling at EU level indicates that gas demand will decline by 71-73% by 2050 as part of the path to net zero climate targets.

Importantly this includes ALL gases including hydrogen and biomethane. Even after considering alternative gases overall gas demand still declines by more than 2/3.Image
2/ Similar modelling has been done for the UK by @NationalGridESO showing that overall gas demand will decline under all scenarios. Image
Read 10 tweets
May 27
How to reduce the vast amount of operational emissions from buildings from heating, cooling and appliances?

Today I delivered a scene setting presentation at a United Nations Framework Convention on Climate Change event. Some key takeaways from my presentation in this 🧵 Image
1/ Until recently operational emissions from buildings were the elephant in the room. This is changing now with more attention being paid to them. Image
2/ In 2022, operational energy demand in buildings (for space heating and cooling, water heating, lighting, cooking and other uses) accounted for a whopping 30 per cent of final energy demand. 27% of total global CO2 emissions are from operational energy use in buildings. Image
Read 13 tweets
Apr 26
"Will we be warm?" I was asked last night by a friend thinking of installing a heat pump in an old not well insulated Victorian house.

My response: "Yes you will."

Heat pumps can work in any building if sized, designed and installed correctly. 🧵

carbonbrief.org/factcheck-18-m…
Image
1/ Many uninsulated homes and buildings are already heated to comfortable temperatures with heat pumps, as shown across multiple case studies, including an uninsulated stone church. isoenergy.co.uk/projects#sort=…
Image
2/ A building loses heat through the walls, the windows and the roof when it is colder outside than inside, as shown by the stylised arrows in the figure in the main post above. The upper panels show an outdoor temperature of 10C, coloured purple, and an indoor temperature of 20C, coloured red.
Read 13 tweets
Mar 16
Energy transition critics often point to primary energy use to demonstrate that it's going to be impossible.

But 72% of the global energy input is currently lost after conversion.

The problem we're trying to solve here is a lot smaller than primary energy use might suggest.🧵 Image
1/ The future energy system will be characterised by a lot more "electricity-only" renewables (mainly solar and wind). Many of the conversion losses are currently due conversion losses at the electricity generation stage. This will no longer be anywhere near as significant in a system dominated by solar and wind.
2/ All end-use sectors will use significantly more electricity. This will result in much higher end-use efficiency and globally could reduce final energy use by up to 40%.
Read 7 tweets

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