A wet solid is dried in a trayed batch dryer under constant drying conditions. The total drying time required to reduce the moisture content of the solid from X1=0.26 (kg H2O/kg dry solid) to X2=0.06 is 8 hours. The decreasing flow period of the solid is a line passing through the origin and is given by the function R=X. a-) Find the total time required for the moisture content of the wet solid to decrease from X1=0.33 (kg H2O/kg dry solid) to X2=0.03 . (The critical free moisture content of the solid is Xc=0.14.) b-) Considering the variation of the drying rate in the decreasing flow period, write down what kind of material this wet solid might belong to.

Soru 4-) (25p.) Islak bir kat, sabit kurutma koullarnda tepsili, kesikli bir kurutucuda kurutulmaktadr. Katnn Xx=0,26 (kg H2O/kg kuru kat) olan nem ieriinin X2 =0,06 deerine drlmesi iin gereken toplam kurutma sresi 8 saattir. Katya ait azalan debi periyodu orijinden geen bir doru olup R=X fonksiyonu ile verilmektedir.a-) Islak katnn nem ieriinin Xx=0,33 (kg H2O/kg kuru kat) deerinden Xx=0,03 deerine drlmesi iin gerekli toplam sreyi bulunuz. (Katnn kritik serbest nem ierii Xc=0,14 'tr.) b-) Azalan debi periyodunda kurutma hznn deiimini dnerek, bu islak katnn hangi tr bir maddeye ait olabileceini yaznz