Moisture Removal Requirement

What is this formula?

The Moisture Removal Requirement equation calculates the amount of water that must be removed from grain during drying to reduce moisture content from an initial value to a desired final value.

When to use it

Use this formula when sizing grain dryers, estimating drying costs, planning harvest operations, or determining storage preparation requirements.

Example

Given:

M = 10000 kg

Mi = 20%

Mf = 13%

Formula:

Mw = M(Mi − Mf)/(100 − Mf)

Substitution:

Mw = 10000(20 − 13)/(100 − 13)

Mw = 10000 × 7 / 87

Mw = 804.60 kg

Result:

Approximately 804.60 kg of water must be removed from the grain.

Applications

- Grain drying calculations

- Dryer sizing

- Energy requirement estimation

- Harvest management

- Storage preparation

- Agricultural processing

Note

This equation assumes that only water is removed during drying and that dry matter losses are negligible.

It is one of the most widely used equations in grain drying engineering because it directly estimates the amount of moisture that must be extracted before safe storage.

The formula is normally applied using wet basis moisture content values, which are the standard in grain commerce and storage.