Hikmet DOĞAN, Mustafa AKTAŞ, İlhan CEYLAN

Isı pompalı bir kurutucuda kerestelerin kurutma süresinin belirlenmesi

Bu çalışmada, kavak ve çam keresteleri 24 saatlik çalışma periyodunda ısı pompalı bir kurutucuda 1.28 kg su/kg kuru madde ve 0.60 kg su/kg kuru madde nem miktarlarından, 0.15 kg su/kg kuru madde nem miktarına kadar kurutulmuştur. Kerestelerin tamamındaki ağırlık değişimi fırın içerisindeyken takip edilebilmiş istenilen ağırlığa gelindiğinde kurutma sonlandırılmıştır. Başlangıç nem miktarı 1.28 kg su/kg kuru madde olan kavak keresteleri 0.15 kg su/kg kuru madde nem miktarına 70 saatte, 0.60 kg su/kg kuru madde de olan çam keresteleri ise aynı nem miktarına 50 saatte getirilmiştir. Kurutma esnasında, kurutma havası bağıl nemi, sıcaklığı ve kerestelerdeki ağırlık değişimi değerleri bilgisayarda toplanarak, daha sonra kurutma süresinin hesaplanmasında kullanılmıştır.

Determining the drying time of timbers in a heat pump dryer

In this study, poplar and pine timbers were dried from the moisture contents of 1.28 kg water/kg dry matter and 0.60 kg water/kg dry matter to 0.15 kg water/kg dry matter in a heat pump dryer over an operation period of 24 h. The change in weight in all of the timbers was followed in the drying chamber and the drying process was stopped when the desired weight was achieved. Initial moisture content of the poplar timbers 1.28 kg water/kg dry matter, the moisture content was reduced to 0.15 kg water/kg dry matter moisture content in 70 h, and the moisture content of the pine timbers with 0.60 kg water/kg dry matter was reduced to the same amount in 50 h. All data collected while drying were saved on computer and afterwards, the drying time was calculated and analyzed.

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