large capacity brewery. Generally one pump and relative piping for wort circulation are Boiling is the process to heat wort to boiling statu. Some processes will be finished during boling, some adjuncts adding, hops adding, vaporize out extra water.
Usually there are double times for adding hops, fisrt time is to break down the alpha acid in the hops and dissolve into the wort; Nearlly at the end of boiling, some brewers like to add more hops to increase the beer flavors.
The boiling is processed in Kettle, which is made of stainless steel with a function of heating. The kettle can be heated by electronic elements, steam or fire directly. It cause three kinds of design for kettle.
Steam has a relatively heating effect for wort, becasue it has a larger and dispersed heating exchange area, and the steam will not contact wort directly. Dimple jacket and calandria are common standard for steam heating kettle. The difference is
Dimple jacket standard usually works for small or middle capacity of brewpub, pilot system or breweries.
Calandrica has a high effective heat exchange rate with a higher cost, so it usually applys to needed.
YoLong engineering team worked on internal calandrica device for years and remove cirlulation pump and piping successfully. The wort circulation was processed by self-priming caused by strong wort boling in tube heat exchanger.
Additional advantage for internal & external calandrica device is avoid over-foaming during boiling.