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The Rate of Constant Drying Period is the rate of drying that takes place for a given set of drying conditions in the constant rate period. Check FAQs
Nc=(Mi(Falling)-MEqtfA)(ln(Mi(Falling)-MEqMf(Falling)-MEq))
Nc - Rate of Constant Drying Period?Mi(Falling) - Initial Weight of Moisture for Falling Rate Period?MEq - Equilibrium Weight of Moisture?tf - Falling Rate Drying Time?A - Drying Surface Area?Mf(Falling) - Final Weight of Moisture for Falling Rate Period?

Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period Example

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Here is how the Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period equation looks like with Values.

Here is how the Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period equation looks like with Units.

Here is how the Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period equation looks like.

1.627Edit=(10Edit-5Edit37Edit0.1Edit)(ln(10Edit-5Edit6.5Edit-5Edit))
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Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period Solution

Follow our step by step solution on how to calculate Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period?

FIRST Step Consider the formula
Nc=(Mi(Falling)-MEqtfA)(ln(Mi(Falling)-MEqMf(Falling)-MEq))
Next Step Substitute values of Variables
Nc=(10kg-5kg37s0.1)(ln(10kg-5kg6.5kg-5kg))
Next Step Prepare to Evaluate
Nc=(10-5370.1)(ln(10-56.5-5))
Next Step Evaluate
Nc=1.62699027611613kg/s/m²
LAST Step Rounding Answer
Nc=1.627kg/s/m²

Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period Formula Elements

Variables
Functions
Rate of Constant Drying Period
The Rate of Constant Drying Period is the rate of drying that takes place for a given set of drying conditions in the constant rate period.
Symbol: Nc
Measurement: Mass FluxUnit: kg/s/m²
Note: Value should be greater than 0.
Initial Weight of Moisture for Falling Rate Period
The Initial Weight of Moisture for Falling Rate Period is the amount of moisture in kg present in the wet solid initially for drying operation.
Symbol: Mi(Falling)
Measurement: WeightUnit: kg
Note: Value should be greater than 0.
Equilibrium Weight of Moisture
The Equilibrium Weight of Moisture is the amount of moisture in kg present in the solid that is in equilibrium with the solid for the given drying conditions.
Symbol: MEq
Measurement: WeightUnit: kg
Note: Value should be greater than 0.
Falling Rate Drying Time
The Falling rate drying time is the time taken for drying operation in the falling rate period.
Symbol: tf
Measurement: TimeUnit: s
Note: Value should be greater than 0.
Drying Surface Area
The Drying Surface Area is the total area in the drying mass transfer operation i.e. exposed in contact with the drying medium.
Symbol: A
Measurement: AreaUnit:
Note: Value should be greater than 0.
Final Weight of Moisture for Falling Rate Period
The Final Weight of Moisture for Falling Rate Period is the amount of moisture in kg present in the solid after the completion of drying operation.
Symbol: Mf(Falling)
Measurement: WeightUnit: kg
Note: Value should be greater than 0.
ln
The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function.
Syntax: ln(Number)

Other Formulas to find Rate of Constant Drying Period

​Go Rate of Constant Drying Period based on Critical Moisture Content
Nc=WSXi(Constant)-XcAtc
​Go Rate of Constant Drying Period based on Final Moisture Content
Nc=WSXi(Constant)-Xf(Constant)Atc
​Go Rate of Constant Drying Period based on Critical to Final Moisture Content for Falling Rate Period
Nc=(WStf)(Xc-XEqA)(ln(Xc-XEqXf(Falling)-XEq))
​Go Rate of Constant Drying Period based on Critical to Final Weight of Moisture for Falling Rate Period
Nc=(Mc-MEqtfA)(ln(Mc-MEqMf(Falling)-MEq))

Other formulas in Drying from Initial to Final Moisture category

​Go Total Drying Time based on Constant Drying Time and Falling Drying Time
t=tc+tf
​Go Constant Drying Time from Initial to Critical Moisture Content
tc=WS(Xi(Constant)-Xc)(ANc)
​Go Constant Drying Time from Initial to Critical Weight of Moisture
tc=Mi(Constant)-McANc
​Go Critical Moisture Content based on Initial Moisture Content for Constant Rate Period
Xc=Xi(Constant)-(AtcNcWS)

How to Evaluate Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period?

Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period evaluator uses Rate of Constant Drying Period = ((Initial Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture)/(Falling Rate Drying Time*Drying Surface Area))*(ln((Initial Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture)/(Final Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture))) to evaluate the Rate of Constant Drying Period, The Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period formula is defined as the Rate of Constant Drying period based on its relation with the drying process in the Falling Rate Period. Rate of Constant Drying Period is denoted by Nc symbol.

How to evaluate Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period using this online evaluator? To use this online evaluator for Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period, enter Initial Weight of Moisture for Falling Rate Period (Mi(Falling)), Equilibrium Weight of Moisture (MEq), Falling Rate Drying Time (tf), Drying Surface Area (A) & Final Weight of Moisture for Falling Rate Period (Mf(Falling)) and hit the calculate button.

FAQs on Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period

What is the formula to find Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period?
The formula of Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period is expressed as Rate of Constant Drying Period = ((Initial Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture)/(Falling Rate Drying Time*Drying Surface Area))*(ln((Initial Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture)/(Final Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture))). Here is an example- 1.62699 = ((10-5)/(37*0.1))*(ln((10-5)/(6.5-5))).
How to calculate Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period?
With Initial Weight of Moisture for Falling Rate Period (Mi(Falling)), Equilibrium Weight of Moisture (MEq), Falling Rate Drying Time (tf), Drying Surface Area (A) & Final Weight of Moisture for Falling Rate Period (Mf(Falling)) we can find Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period using the formula - Rate of Constant Drying Period = ((Initial Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture)/(Falling Rate Drying Time*Drying Surface Area))*(ln((Initial Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture)/(Final Weight of Moisture for Falling Rate Period-Equilibrium Weight of Moisture))). This formula also uses Natural Logarithm (ln) function(s).
What are the other ways to Calculate Rate of Constant Drying Period?
Here are the different ways to Calculate Rate of Constant Drying Period-
  • Rate of Constant Drying Period=Dry Weight of Solid*(Initial Moisture Content for Constant Rate Period-Critical Moisture Content)/(Drying Surface Area*Constant Rate Drying Time)OpenImg
  • Rate of Constant Drying Period=Dry Weight of Solid*(Initial Moisture Content for Constant Rate Period-Final Moisture Content for Constant Rate Period)/(Drying Surface Area*Constant Rate Drying Time)OpenImg
  • Rate of Constant Drying Period=(Dry Weight of Solid/Falling Rate Drying Time)*((Critical Moisture Content-Equilibrium Moisture Content)/Drying Surface Area)*(ln((Critical Moisture Content-Equilibrium Moisture Content)/(Final Moisture Content for Falling Rate Period-Equilibrium Moisture Content)))OpenImg
Can the Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period be negative?
No, the Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period, measured in Mass Flux cannot be negative.
Which unit is used to measure Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period?
Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period is usually measured using the Kilogram per Second per Square Meter[kg/s/m²] for Mass Flux. Kilogram per Hour per Square Meter[kg/s/m²], Kilogram per Hour per Square Foot[kg/s/m²], Pound per Hour per Square Foot[kg/s/m²] are the few other units in which Rate of Constant Drying Period based on Initial to Final Weight of Moisture for Falling Rate Period can be measured.
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