Investigation of relation between moisture content decrease and water mass flow removed from a kiln

• Autorzy: Widlak H. , Majka J.
• Języki publikacji: EN

Abstrakty

EN

Currently, the basic way of wood moisture content decrease control during drying process is measurement of that moisture content with resistance meters on a random selection of timber items. The results of that measurements are particularly unreliable, especially at wood moisture content below fibre saturation point and, on the other hand, they are influenced by accuracy of sample’s choice. Research considered the problem of monitoring of water mass flow that is removed with air in order to control the course of drying process. As a results of experiments, during drying of pinewood timber, it was stated that the monitoring of outlet air state allows for the verification of measurements of moisture content with resistance meters. The monitoring of air state at inlet and outlet of a kiln creates the possibilities of a more complex control of wood drying process.

Słowa kluczowe

EN

drying; water mass flow; drying medium; measurement; fibre saturation point; wood technology; wood drying process; moisture content; drying process; wood moisture

• Wydawca: -
• Czasopismo: Electronic Journal of Polish Agricultural Universities. Series Wood Technology
• Rocznik: 2004
• Tom: 07
• Numer: 2
• Opis fizyczny: http://www.ejpau.media.pl/series/volume7/issue2/wood/art-03.html

Twórcy

autor

Widlak H.

• The August Cieszkowski Agricultural University of Poznan, Wojska Polskiego 38/42, 60-627 Poznan, Poland

autor

Majka J.

Bibliografia

• Carlsson P., Esping B., Dahlbom O., 1996. Optimization of the wood drying process. Proc. 5th IUFRO WDC: 529-532.
• Grzybowski M., Guzenda R., 1997. Współczesne komputerowe systemy sterowania komorowymi suszarkami do tarcicy [Modern computer control systems of the drying process of timber]. Przem. Drzew. 8: 8-11 [in Polish].
• Kamke F.A., Vanek M., 1994. Comparison of wood drying models. Proc. 4th IUFRO WDC, Rotorua: 1-21.
• Strumiłło C., 1983. Podstawy teorii i techniki suszenia [Basis of theory and drying technology]. WNT, Warsaw [in Polish].
• Voronjec D., Antonijević D., 1996. Moist air drying potential in convective drying process. Proc. 10th Int. Drying Symp. Cracow: 221-228.
• Voronjec D., Antonijević D., 1998. Determination of moist air drying ability using chemical potential of water vapour. Drying Technol. 16: 1-2: 45-57.
• Walczak M., 2001. Analiza wpływu intensywności procesu suszenia na dynamikę spadku wilgotności w materiałach stycznych i promieniowych [Analysis the influence intensity of drying process on moisture content decrease in back-sawn and quarter-sawn timber]. Thesis [in Polish].
• Widłak H., 1994-1995. Badanie zależności między rzeczywistym i potencjalnym strumieniem masy wody odprowadzanej z drewna w wybranych programach suszenia [Investigation of relation between real and potential water mass flow removed from a wood in selected drying schedules]. Rocz. AR Pozn. 280: 159-167.
• Widłak H., 2000. Relationship of process parameters and stack width in timber drying. Drying Technol. 18(7): 1495-1508.
• Widłak H., 2001. Współzależność czynników procesowych i materiałowych w konwekcyjnym suszeniu tarcicy w suszarkach komorowych [Relationship between process and material paremeters during convective kiln drying of timber]. Rocz. AR Pozn. Dissertation [in Polish]
• Widłak H., Olek W., 1997-1998. Algorytm obliczeń sprawności suszenia tarcicy w suszarkach komorowych [Method of calculation of timber drying effciency]. Rocz. AR Pozn. 300: 39-44 [in Polish].