Worcester Solar-Lux are double-walled glass evacuated tubes featuring a CPC mirror for improved solar collection.
With Solar-Lux, a mixture of water and glycol flows through a U-shaped pipe inside a glass tube. This acts like a vacuum flask, trapping the heat from the solar radiation in the heating fluid with very low heat losses. Integration of the absorber into the evacuated glass tube means that less space is generally required to install the required solar heating capacity, compared to flat plate collectors.
The use of the concave Compound Parabolic Concentrator (CPC) mirror, set behind the tubes, allows heat from direct and diffuse solar radiation to be absorbed, effectively providing 360 degree absorption to the tube. Consequently, Solar-Lux collectors are less dependent on their orientation to the sun than some other designs of collector.
The combination of 360 degree absorption and low heat losses makes Solar-Lux collectors particularly suitable for use where conditions and temperatures are not optimal – for example in areas of the UK with lower than average temperatures.
Solar-Lux collectors feature a special coating that makes them highly weather resistant and able to withstand the most rigorous conditions.