How to confirm the size of beer lauter tank Tekbrew

Writer： admin Time：2023-03-17 09:41:36 Browse：290℃

How to calculate the diameter of beer lauter tank or Mash/Lauter tun

 For Example

If we want to design a 1000L brewing system and brew a beer with 15 Plato 

Roughly by formula, the malt weight is (15% x 1000kg) / (80% x 90%) ≈ 210kg

 

I. By unit load of false bottom

Dry malt milling, 140kg - 175kg/m2, let’s set 160kg/m2

So the false bottom S = 210/160=1.312m2

By formula: 1.312m2 = πR2， we can get the R = 0.646m

Then we can get the inner diameter of lauter tank is 1300mm

 

II. By grain depth

Considering the filter effect, generally the spent grain depth is 0.3m – 0.4m, let’s set 0.35m

If 210kg malt, the final spent grain volume is around 0.38m3

by formula: 0.38m3 = πR2 x 0.35m,  we can get the R = 0.588m

Then we can get the inner diameter of mash/lauter tun is 1200mm

 

From the above different ways of calculation, we get 2 numbers.  But it’s very close for home brewing

So About diameter of beer lauter tank, we need consider other factors

 

The beers

Malt type

Sugar Yield

Extract Efficiency

False bottom type