Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Akademii Rolniczej we Wroclawiu, ISSN 1505-0297

Aniszewska M. , Więsik J. 2003. MODEL OF DRYING SPRUCE (PICEA ABIES (L.) KARST.) CONES SUBJECTED TO PROCESS OF SEED EXTRACTION, EJPAU 6(2), #01.
Available Online: http://www.ejpau.media.pl/volume6/issue2/forestry/abs-01.html

ABSTRACT

Process of seed extraction from the cones is long-lasting and energy-consuming. The state of spruce cone opening can be achieved in the kilns used at present after several hours of drying. Undertaking of an attempt towards improvement of the process calls for learning of the factors influencing its realization. The paper contains the results of investigations on convectional drying of spruce cones of various size, and the proposed mathematical description of the changes in their moisture content in time. It was proved that they could be well represented by a trinomial square of coefficients significantly influenced by the cone volume. However, the time essential for opening the cone dried at temperature 58°C amounted to 6–8 hours, independently of the cone size. The moisture content of open cone amounted to 3–8%.

Key words: spruce, cones, seeds, seed extraction, model of drying.

---