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Temperature control in a solar kiln

Temperatursteuerung im Solartrockner

  • Forschung und Praxis
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Abstract

Realizing the effect of venting on temperatures in a solar kiln, average kiln temperatures were measured in a solar kiln with automatic vent control. These temperatures were found to be less than 2°C above ambient with the wood above fibre saturation point and increased to about 10°C when the wood reached 12% moisture content. The effect of these relative small differences between kiln and ambient temperatures on the drying rate were investigated as well as methods to increase the average temperature in a solar kiln.

Zusammenfassung

Da es bekannt ist, daß die Ventilation die Temperatur im Solartrockner stark beeinträchtigt, wurden die Temperaturen in einem Solartrockner mit vollautomatischer Ventilationssteuerung untersucht. Es ergab sich, daß die Temperaturen im Trocknungsbereich von grün bis 30% im Durchschnitt kaum 2°C über der Außentemperatur lagen und daß diese Temperaturdifferenz bei 12% Holzfeuchte bis 10°C anstieg. Der Einfluß dieses geringen Temperaturunterschiedes auf die Trocknungsgeschwindigkeit wurde zusammen mit Methoden, um die Durchschnittstemperatur im Solartrockner zu erhöhen, untersucht.

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Steinmann, D.E. Temperature control in a solar kiln. Holz als Roh-und Werkstoff 48, 287–291 (1990). https://doi.org/10.1007/BF02626520

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