Improved large-area collectors from Solvis

08.09.2015
The double meander in the Fera 803 I AR reduces the pressure loss and increases the yield. (Photo: Solvis)
The double meander in the Fera 803 I AR reduces the pressure loss and increases the yield. (Photo: Solvis)

Solvis recently introduced three new large-area collectors. According to the manufacturer, they are improved versions of the existing range of large-area collectors in different sizes that achieve significantly higher yields than previous models.

Solvis recently added three new large-area collectors to its product range. The Fera F 553 I AR, F 653 I AR and F 803 I ARare improved versions of the existing large-area collectors and are available in the sizes 5.6 m2, 7.0 m2 and 8.4 m2. As in the case of previous models, Solvis is using a glass plate with an AR coating. The hydraulics of the collector are new. Older models are equipped with harp-shaped or double harp-shaped pipe registers. The new models are equipped with a double meander. This reduces pressure losses by approximately 50%. It enables the series-connected collector strings to be longer than previously, which simplifies the hydraulics for large systems and reduces the pipe work.

Solvis was also able to improve the performance of the collectors by using a new double meander. The conversion factor rose from 0.83 to 0.84. That might not sound like much, but together with the improved heat loss coefficient, it makes a notable difference. The yield of the 8.4 m2 collector is stated at 4422 kWh/a in the Solar Keymark data sheet (location Würzburg, Tm = 50 °C). The previous version only achieved 4174 kWh/a.

Jens Peter Meyer

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