Rebecca Pool, writing for ESCI, describes green district heating projects where the operator is a âmiddle manâ between new energy generators (waste heat, renewables, etc.) and end users. The energy crisis has created an opportunity, as unpredictable gas prices combined with new carbon targets have made the long-term investment more attractive. But district heating is in direct competition from heat pumps and natural gas, so it needs to be price … [Read more...]
Heating Households and Buildings: Heat Pumps will be up to three times cheaper than Green Hydrogen
A new study concludes that heating from 100% green-hydrogen would be up to three times more expensive than one based on 100% electrification of buildings with heat pumps. Josh Gabbatiss at Carbon Brief summarises the findings, who says itâs yet more evidence to push back against the voices of politicians and fossil-fuel companies wanting to see hydrogen in the household and buildings heating mix (for example, the UK is planning a âhydrogen … [Read more...]
How to sell Heat Pumps to the public in Europe
In EU households, 62.8% of energy consumption is for space heating, and another 15.1% for water heating, mostly powered by fossil fuels. Heating and cooling is responsible for 52% of final energy demand in Europe. So, with REPowerEU, the EU has once again strengthened support for heat pumps to achieve energy independence and climate goals. Heat pump sales in Europe grew by an unprecedented 34% in 2021, thanks to a total 2.18m heat pump units … [Read more...]
30+ nations now subsidise Heat Pumps because lifetime cost is cheaper than fossil boilers
The global growth in heat pumps can deliver almost 40% of all possible emissions cuts from heating by 2030 (with most of the rest coming from efficiency, mainly insulation), says the IEA. This is according to their âAnnounced Pledges Scenarioâ (APS) which assumes that governments carry out all of the climate commitments they have made. Keeping buildings warm produces one-tenth of global energy-related CO2 emissions. So the APSâs heat pump growth … [Read more...]
Evaporation and Radiation cooling: no power required (but the aerogel must get cheaper)
It is well known that evaporation and radiation are two ways of keeping something cool. David Chandler at MIT explains how researchers there have created an experimental 3-layered cell that combines evaporation and radiation with an insulator to deliver cooling that needs no power. It can provide around 9°C of cooling from the ambient temperature, enough to permit safe food storage for about 40% longer under very humid conditions, and could … [Read more...]
EU Heat Pumps: warnings against âone size fits allâ policies
The EU is aiming for the installation of 50 million heat pumps by 2030, equating to annual growth of 16%, reaching one third of the total 150 million boiler installations in the bloc. Helen Farrell reviews these ambitious targets and the policies that are driving them, and turns to a report by RAP to identify the weaknesses in the plan and how it can be improved. The main danger is a âone size fits allâ approach. Different countries have … [Read more...]
Netherlands and China co-operate on Aquifer Thermal Energy Storage for heating and cooling
Aquifer Thermal Energy Storage (ATES) accesses the stable temperature of groundwater to warm buildings in winter and cool them in summer. The solution uses much less power than conventional heating and cooling systems. As Daisy Chi at ECECP explains, ATES first took off in China in the 1960s but ran into problems with the required circulation of the groundwater. However, the technology has been developed and optimised in the Netherlands: of the … [Read more...]
How a street can share a Ground Source Heat Pump
Ground and air source heat pumps are expected to play a major role in cutting the use of gas for heating. But one major problem with them is that they need a lot of space. For those living in dense housing itâs just not practical. District heat networks are the usual alternative, but the dense urban areas they serve need to be near a large source of waste heat like power stations or other industrial units. David Barns at the University of Leeds … [Read more...]
Will turning down Europeâs thermostats ease the Gas supply crisis?
To counter the extremely high gas prices caused by the Russia-Ukraine crisis the IEA has proposed turning thermostats down in households to use less gas. The IEA estimated lowering the heating by just 1°C would reduce gas demand by around 10 bn cubic metres a year, or 7% of Europeâs annual imports from Russia. Aurore Julien at the University of East London looks at quantifiable past attempts around the world to get citizens to cut their energy … [Read more...]
District Heating Roundtable: Policy across RED, EED and EPBD “must take account of conditions in all Member States”
Sara Stefanini provides a written summary of our panel discussion held on 10th February: District Heating under the "Fit for 55" package: challenges and opportunities. Under the âFit for 55â package, the EC proposed several regulatory changes that, combined, are meant to decarbonise district heating in Europe. But are these options workable for all? The participants raise questions over the support for district heating, whether the multiple … [Read more...]
Redesigning UK electricity taxes to boost Heat Pump sales
In the UK, consumer prices for electricity are five times more expensive than for gas. It is a disincentive to adopt electric heat pumps. To make things harder, 23% of the electricity price comes from climate and social levies. Itâs just 2% for gas. No wonder the UK continues to install about 1.7 million gas boilers a year. Jan Rosenow and Richard Lowes at RAP call for changes that will incentivise customers to buy heat pumps while having a … [Read more...]
Super-efficient space cooling can mitigate 0.5°C of warming by 2100
Space cooling eats up 10% of global electricity use, and by 2050 total energy consumed could triple as ownership takes off in developing countries. Itâs why the Global Cooling Prize was launched to find AC designs that will have an 80% lower climate impact, explains John Matson at RMI. The two main design goals were to reduce electricity demand, and use refrigerants with lower global warming potential (GWP) than traditional refrigerant gases. The … [Read more...]
EU Recovery funds: where is the support for District Heating?
District Heating is an efficient way to heat homes, particularly in a country like Latvia where 58% of its primary energy consumption is used for heating. But SelÄ«na VancÄne at Riga City Council is very concerned that the draft EU Recovery plans do not include any support under the climate goals for district heating projects. Perhaps itâs because of a blind spot: most of Europe is prioritising individual heating units powered by electricity. … [Read more...]
Cooling: up-front costs are the barrier to new solutions that cut energy use by two-thirds
Existing, latest technology could be delivering the worldâs current air conditioning needs with just a third of the energy use, say Sneha Sachar at the AEEE (India) and Iain Campbell at RMI. The main barrier is the up-front costs. And thatâs for everything from improving the thermal efficiency of buildings to accelerating the deployment of the most efficient cutting edge ACs (at present, legal minimums lag behind the best ACs, and the best ACs … [Read more...]
UK heating plan still means 120 gas boilers installed for every low-carbon system
Though the UK is a leader in grid electrification it is a poor performer when it comes to the electrification of heating. In May the UK government proposed a clean heat policy to support the switch away from gas heating for 12,500 homes a year for two years. Jan Rosenow and Samuel Thomas at RAP say that looks like business as usual: for every one new low-carbon heating system, more than 120 gas boilers will be installed as normal. In 2019, 1.7m … [Read more...]
