29 Dec '11, 4pm

#Solar Thermal, Water, & Cold Climates Can All Get Along. Ritter XL compound parabolic collector survives freezes.

36,597 square feet of Ritter XL solar collectors were installed on an exhibition hall in Wels, Austria, providing almost 7 million Btu/hr of supplemental hot water for district heating. Photo: Ritter Group Most solar thermal systems installed in cold climates use antifreeze, but Ritter XL Solar is engineering its systems with water. Can a large-scale commercial system survive the cold? Ritter XL is doing what few solar thermal manufacturers have dared: creating large-scale solar thermal systems in cold climates running on only water. The company is using its compound parabolic concentrating (CPC) collectors to generate high-temperature water for commercial, multifamily, district heating, and other applications that have high demand for hot water. Distributed in the U.S. by Regasol USA, a subsidiary of the German company Ritter Gruppe, these complex systems require precise ...

Full article: http://www.buildinggreen.com/live/index.cfm/2011/8/18/Sol...

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