15.07.2015   The Experimental Analyze Of The Solar Energy Collector

Procedure for calculating the parameters for stagnation

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The following schema (Fig. 3) illustrates the procedure for estimating steam-producing power, steam spread and steam volume:

Calculating of the boiling

Calculating the theoretical stagnation

point according (2)

—►

power according (1)

»s = 100°C + 35.1K — ln (psys)

Pstag = GT, stagh0 _ a1 (^S _ ^a ) _ a2 (^S _ ^a )

Fig. 3: Simplified calculation schema to determine SPP, StS and SV and to dimension the expansion vessel

and cooling load.

With this empirical model, it is now possible to predict steam-producing power, steam spread and steam volume in the solar circuit for collector arrays of up to 30 m2.

References

[1] Hausner, R; Fink, C. (2003): Stagnation Behaviour of Thermal Solar Systems. In: Proceedings ISES Solar World Congress 2003. Goeteborg, Sweden.

[2] Scheuren, J; Kirchner, M.; Eisenmann, W. (2006): Reduction of Stagnation Load of Large-Scale Collector Arrays. In: Proceedings EUROSUN 2006, Glasgow, Scotland.