What is Falling Rate Period Drying?
The falling rate drying period is a stage in the drying process where the rate of moisture removal from the material decreases over time as the internal moisture content of the material is reduced. During this period, the drying rate is typically controlled by the rate of moisture diffusion within the material, which is slower than the rate of heat and mass transfer at the surface of the material. In this stage, the moisture content of the material decreases more slowly than during the constant rate drying period, as the remaining moisture is located deeper within the material and must diffuse to the surface before it can be removed. The length of the falling rate period depends on the properties of the material being dried, such as its porosity, particle size, and moisture distribution.
How to Calculate Drying Surface Area based on Initial to Final Moisture Content for Falling Rate Period?
Drying Surface Area based on Initial to Final Moisture Content for Falling Rate Period calculator uses Drying Surface Area = (Dry Weight of Solid/Falling Rate Drying Time)*((Initial Moisture Content for Falling Rate Period-Equilibrium Moisture Content)/Rate of Constant Drying Period)*(ln((Initial Moisture Content for Falling Rate Period-Equilibrium Moisture Content)/(Final Moisture Content for Falling Rate Period-Equilibrium Moisture Content))) to calculate the Drying Surface Area, The Drying Surface Area based on Initial to Final Moisture Content for Falling Rate Period formula is defined as the drying surface area required for drying from initial to final moisture content in the falling rate period for the specified drying conditions. Drying Surface Area is denoted by A symbol.
How to calculate Drying Surface Area based on Initial to Final Moisture Content for Falling Rate Period using this online calculator? To use this online calculator for Drying Surface Area based on Initial to Final Moisture Content for Falling Rate Period, enter Dry Weight of Solid (WS), Falling Rate Drying Time (tf), Initial Moisture Content for Falling Rate Period (Xi(Falling)), Equilibrium Moisture Content (XEq), Rate of Constant Drying Period (Nc) & Final Moisture Content for Falling Rate Period (Xf(Falling)) and hit the calculate button. Here is how the Drying Surface Area based on Initial to Final Moisture Content for Falling Rate Period calculation can be explained with given input values -> 0.08135 = (100/37)*((0.1-0.05)/2)*(ln((0.1-0.05)/(0.065-0.05))).