Solar Thermal (Hot Water) Systems

Solar thermal (hot water) systems can be extremely efficient, reducing costs and energy consumption. For a solar system to work, all they need is daylight as they can collect both direct radiation, direct sunlight on clear days, and diffused radiation, light which is present on cloudy days.

Both flat plate collectors and evacuated tube collectors have selective and non selective surfaces. In terms of which collector has best efficiency, it is dependant on your domestic use. At low temperatures the efficiency for all the collectors is very similar, but as temperatures increase all the collectors show a slight reduction in efficiency. For lowest temperatures an unglazed non-selective surface flat plate collector can be seen as most effective, hence they are commonly used to heat swimming pools, however for highest temperatures there is a very marginal difference between selective surface evacuated tubes and selective surfaces flat plate collectors, with the former being the most efficient.

In terms of costs you would expect to save between 50 -70% on your annual heating costs, as the more hot water used the greater the saving. For a family of four, a well designed solar water heating system should contribute around 1,500 kW-h and 2,000 kW-h, which will be equivalent to 50 to 65% of the household’s water heating energy needs.

Reference: The Solar Trade Association

Urban Energy

Urban Energy is an innovative organisation specialising in the financing, design and installation of economic and environmentally sound solar powered energy systems for commercial property (private and public) and domestic dwellings.

We can provide systems eligible for grants of between 50% up to 100% through arrangements in place with our partners.

0% interest instalment payment program available for domestic solar thermal and photovoltaic systems.

For further information about Urban Energy products and services:
Call: 0800 232 1624
Email: info@urbanenergy.org.uk
Website: http://www.urbanenergy.org.uk/