Dryer Design Calculator

Calculate water removal, drying time, energy requirements, and exit humidity for batch and continuous dryer operations.

Wet Feed Rate

kg/hr

Initial Moisture Content

mass fraction

Final Moisture Content

mass fraction

Drying Temperature

°F

Air Flow Rate

m³/hr

Dryer Type

(1=batch, 2=continuous)

Tab to move between fields

Water Removed

578.95 kg/hr

Dry Product Rate

421.05 kg/hr

Estimated Drying Time6.95 min

Energy Required1,538,321.05 kJ/hr

Air Exit Humidity0.1 kg/kg dry air

How to Use This Calculator

Enter the Wet Feed Rate in kg/hr and the Initial Moisture Content as a mass fraction (e.g., 0.60 = 60% wet basis moisture).
Enter the Final Moisture Content as a mass fraction target (e.g., 0.05 = 5% residual moisture).
Enter the Drying Temperature in °C and the Air Flow Rate in m³/hr through the dryer.
Select Dryer Type: 1 for batch (fixed charge, longer cycle) or 2 for continuous (steady-state throughput).
Review Water Removed in kg/hr and Dry Product Rate in kg/hr to confirm throughput matches production requirements.
Check Energy Required in kJ/hr and Air Exit Humidity in kg/kg dry air for utility sizing and exhaust treatment design.

How the result changes with Initial Moisture Content

Wet Feed Rate: Mass flow rate of the wet material entering the dryer.
Initial Moisture Content: Mass fraction of water in the wet feed (e.g., 0.6 = 60% moisture).
Final Moisture Content: Desired mass fraction of water in the dried product.
Drying Temperature: Temperature of the drying air or heating medium.
Air Flow Rate: Volumetric flow rate of drying air through the dryer.
Dryer Type: Select 1 for batch dryer (longer drying time) or 2 for continuous dryer.

Identify Input Parameters
4 parameters
Wet Feed Rate = 1000, Initial Moisture Content = 0.6, Final Moisture Content = 0.05, Drying Temperature = 120 = 6 input(s) provided
Calculate Water Removed
Water Removed = Math
578.95 = 578.95
Calculate Dry Product Rate
Dry Product Rate
421.05 = 421.05
Calculate Estimated Drying Time
Estimated Drying Time = Math
6.95 = 6.95
Calculate Energy Required
Energy Required = Math
1538321.05 = 1538321.05