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What is the difference between single stage and two stages heat exchanger in a brewery

  • Mar 22, 2022
  • 138
  • tiantai
Brief introduction of brewery heat exchanger
Heat Exchanger, a piece of brewery equipment designed to quickly raise or lower the temperature of wort or beer. Heat exchangers in breweries are often referred to as “plate heat exchangers” because they are built as a series of plates; a hot liquid flows along one side of the plate and cold liquid flows along the other side. A heat exchange takes place across the plates.
The most common heat exchanger is found in the brewhouse.


 
The difference between single stage and two stages brewhouse heat exchanger
 
Single stage brewhouse heat exchanger
The hot wort only be cooled by one cooling medium, for example city water or cold water.
 
Hot wort at approximately 95°C is run through single stage heat exchanger, where it is cooled by cold water or city water coming along the reverse side of the plate in the opposite direction. The hot wort will be cooled down to for example 12℃ and ready for fermentation, and the cold water is heated to perhaps 80°C and is returned to a hot water tank, ready to be used in the next brew or elsewhere in the brewery. On average, heat exchangers will be sized 2 - 3 times bigger so that the entire contents of the kettle can be cooled to fermentation temperature in 40 min or less.
 
Two stages brewhouse heat exchanger
The hot wort will be cooled by two cooling medium, normally with city water and glycol water.
At first stage, the hot wort will be cooled down to around 30 - 40℃ by city water, and raised city water will be recycled back to hot water tank.
At second stage, the glycol water will continue cooling the wort coming from first stage. The wort temperature down to fermentation temperature, and raised glycol will circulate back to glycol water tank.
 
A heat exchanger is very energy efficient because the heat originally used to bring wort to the boil is partially reused to heat cold water coming into the brewery.
 
If you want to know how to choose your brewery heat exchanger, I remain at your disposal.
 
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Tags : brewery heat exchanger    brewhouse heat exchanger   
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