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What Should We Pay Attention During Whirlpool Tun Design?

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What Should We Pay Attention During Whirlpool Tun Design?

The whirlpool tun is the place for separation of hot trub from the wort.

In addition to a bottom drain, multiple outlets on the side of tank 

are commonly installed in order to cool the wort before it completely settled. 

Normally we suggest 1-2 outlets on side for microbrewery. 

There is also a trub retainer around the wort outlet to stop the trub from going away.

hot trubs baffle

The optimal whirlpool is a height-to-diameter ratio of 1:1.

The whirlpool rotation depends on the hemisphere the brewery locates, 

clockwise for Northern hemisphere and anti-clockwise for Southern. 

But direction does not appear to be very critical to its function.

clockwise direction whirlpool inlet

Designs of whirlpool tangential inlet should avoid placing objects, 

such as temperature probes and piping in such a way that they protrude into the tank 

because they may interfere with the fluid motion and trub pile formation.

Whirlpool tun should also be adequately and safely vented to allow 

for the rapid increase in pressure that is caused by boiling-hot wort quickly entering the tank.

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