What is a "hot wort storage tank"? This developing term is specifically what it sounds like, a container that holds warm wort. After the strike and jump separation, the warm wort is pumped into a holding container in preparation for the cooling procedure.
The exterior of the hot wort tank.
Occasionally called a whirlpool tank, the warm wort tank has an added feature beyond that of a holding vessel. The centrifugal action of the swirling wort creates healthy protein solids called "trub" (obvious "troob") to concentrate in the facility of the storage tank base.
Trub is a naturally-occurring product of brewing and requires to be removed in order to clear up the beer. There are procedures to do this downstream, but whirlpooling helps significantly.
Developing tradition has it that the benefits of whirpooling were found accidently when a pipefitter operating in a confined space needed to install the inlet pipe to the warm wort storage tank at a severe angle. This caused the wort to swirl around the within the container, developing a whirlpool and also the succeeding trub concentration.
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