Hydrogen homes are being built around Europe but does the renewable fuel cut your heating bills?
The UK has achieved a significant milestone in the shift to clean energy as its first neighbourhood-scale hydrogen homes have been opened.
A group of three show homes in the east of Fife, Scotland, were officially opened by First Minister John Swinney.
The homes demonstrate how hydrogen can be used to provide both heating and cooking. Dubbed the H100 project, the plan is to expand it to up to 300 homes in the coming months.
What's a hydrogen home and how do they operate?
is regarded as a crucial technology for reducing carbon emissions in this industry.
Switching to a hydrogen supply requires new household appliances, including cookers and boilers. Bosch has introduced its first hydrogen cooking stove, notable for its 'invisible flame', which will be trialled in homes at the H100 Fife project.
The process works in the same way, but mainly affects the supplier. As a result, it's considered one of the least invasive ways of reducing carbon emissions from home heating.
How is hydrogen being used in homes in various parts of the world?
By 2050, it's expected to cover 10% of the EU's energy demands.
Despite the clock running out on these targets, take-up of hydrogen at a domestic level has been low, with only a few small-scale projects currently underway.
In Benevento, the town uses hydrogen not only for heating but also to generate the power the building needs.
Several pilot projects are underway, including linking 12 occupied homes in Lochem to hydrogen for heating in 2022. In 2023, 33 homes in Wagenborgen were switched to hydrogen heating. And in the northern Dutch city of Hoogeveen, 80 to 100 brand new homes will be connected to the hydrogen network.
Next year, this will be used as fuel for trucks, while any excess heat from hydrogen production will be used to warm homes in the local area.
Not all hydrogen is good hydrogen.
At the point of use, hydrogen is a really clean fuel. Unlike coal and gas, it doesn't produce any carbon dioxide when it's burned.
However, not all hydrogen is as green as it seems. Generating hydrogen involves using electrolysis to break down hydrogen from oxygen in water. But if the electricity used in this process comes from non-renewable sources, the benefits of using hydrogen as a fuel are cancelled out.
The European Parliament predicts that about 70 to 100 million tonnes of CO2 are produced annually in the manufacturing of today's hydrogen supplies.
To make hydrogen a long-term option, it's essential to use renewable energy to power electrolysis. Green hydrogen is the only truly sustainable type of hydrogen, but at the moment, it makes up less than one per cent of the total hydrogen produced.
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For H100 Fife, the hydrogen is being produced using renewable electricity from a local offshore wind farm.
Does hydrogen reduce heating costs?
Hydrogen's the most common element on earth, but it's a bit tricky to handle. You need significant investment in transport systems and storage facilities, and constant checking to ensure everything's safe.
As far back as 2022, research was flagging up the risk of overestimating the benefits of hydrogen in everyday household settings. The Regulatory Assistance Project, an energy think tank, had a look at 32 studies of hydrogen and concluded that it's unlikely to play a big role in heating homes.
There's a growing interest in "district heating" and "solar thermal" technologies.
Recently, a report from the Institute for Energy Economics and Financial Analysis, released in January, discovered that burning hydrogen poses health and safety risks for local residents and is an ineffective means of reducing carbon dioxide emissions.
“Not only does burning hydrogen at home pose a health and safety risk, but it will also slow down the shift to electricity, meaning people will have to keep burning gas in their homes for longer,” said Suzanne Mattei, an energy policy analyst from the IEEFA and co-author of the report. “Proposals to use hydrogen in residential buildings also overlook the challenges hydrogen use is facing because of competition in the market and difficulties with infrastructure.”
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