Collector with newly-developed pipe hydraulics

The parallel meander used in the KS 23-13 reduces pressure loss compared to models with single meanders. (Photo: Solmetall)
The parallel meander used in the KS 23-13 reduces pressure loss compared to models with single meanders. (Photo: Solmetall)

Solmetall GmbH is introducing a new flat plate collector with a surface area of 2.32 m2 that has improved hydraulics for lower pressure losses.

The OEM flat plate collector manufacturer Solmetall GmbH in Spenge is offering its customers a new model. The KS 23-13 has a total surface area of 2.32 m2. As with all collectors made by Solmetall, the copper tube on the back of the absorber plate is enclosed in an omega-shaped heat conducting sheet. The absorber and heat conducting sheet are made of aluminium and glued together. The new feature on the K 23-13 is its hydraulics. Solmetall developed a parallel meander and has applied for a patent on it. Compared to a single meander, it significantly reduces pressure loss. This allows more collectors to be connected in series or the pump power to be reduced while using the same number of collectors.

The conversion factor of the collector is 0.832 and the yield is specified at 1258 kWh/a in the Solar Keymark data sheet (location Würzburg, Tm = 50 °C). The collector is 80 mm high and is insulated using 35-mm rear panel insulation. The frame and rear panel are made of aluminium.

Jens Peter Meyer

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