Suszenie pieczarek w warunkach konwekcji naturalnej - badanie skurczu suszonych obiektow

Przeprowadzono pomiary zmian objętości trzonów i kapeluszy pieczarek podczas procesu suszenia w temperaturach 50, 59, 70 i 81°C. Wyniki badań przedstawiono na wykresach. Zaproponowano formuły uzależniające zmiany objętości suszonego materiału od jego zawartości wody.

Convection drying of mushrooms os significantly affected by the changes in voleme of dried objects, strongly decreasing the surface of mas tansfer. To describe in mathematical form the shrinkig process, the volume of mushrooms stems and caps was measured, depending on their moisture content (dry basis). The results are presented on V / Vₒ = f (u / uₒ) diagrams. Mathematical functions (f) of linear and power form were selected, well aproximating measurement results at relatively simple structure. Structural model of shrinkage was also proposed which asuumes decreasing of mushroom volume by the of evaporated water.