The
’s energy mix has never been more in the spotlight. The decline in oil reserves, combined with rising energy demands, are causing concern over how the nation is to fuel its future.
Local energy generation (or microgeneration) — technology installed in the home or in local communities to allow them to generate their own energy — has been recognised as an important and growing part of this mix. It could provide a substantial proportion of the
The Energy Saving Trust undertook a detailed review of technologies, the current market and the possible role and impact of local energy generation in the
The report concluded that microgeneration technologies could deliver a significant contribution to
However, to bring these technologies into the mainstream, certain barriers must be addressed and, while outlining those, the report also looked at potential solutions. For example, capital grant schemes could help industry overcome the significant cost of technology while additional government interventions might help in other areas, such as planning. A fair price for the sale of local electricity surpluses is also critical.
The report investigated a number of technologies. For instance, combined heat and power generation from
Fuel cells that combine hydrogen and oxygen to form electricity, heat and water could be the dominant microgen electricity generator, once commercialisation is achieved. In 2050, with appropriate support, small fuel cells could supply nine per cent of
Small wind turbines also show enormous promise. Using wind to generate power has the potential to supply four per cent of
The report was less favourable about solar photovoltaic systems, which use cells to convert daylight into electricity. It concluded that, although promising, they are likely to remain expensive for some time, with cost-effectiveness not predicted until 2030. But overall this technology has the potential to supply almost four per cent of
Biomass heating and heat pumps could also be commercial when compared with electrical heating. With appropriate support these technologies combined could reduce domestic sector CO2 emissions by three per cent by 2050.
Using heat from the sun alongside a conventional water heater is currently the largest microgeneration industry, concluded the study — but it will need substantial grant support to maintain uptake and growth.
All in all, the report painted a promising picture for the future needs of the
Philip Sellwood is chief executive of the Energy Saving Trust
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