Steam heating option
How the built-in heater works
The wort in the column tube is heated and boils and sprays upwards. To drop the foam formed during the boiling process and avoid the phenomenon of overflowing the pot, a diversion cover is equipped above the heater. The shape of the diversion hood is umbrella-shaped. When the wort boils, the spray touches the diversion hood, and then disperses and falls to complete the wort self-convection cycle from the inside to the outside.
There are 2 CIP cleaning balls designed under the shroud for easy cleaning of the built-in heater.
Advantages of built-in heaters
- Less heat loss. The wort heated by the built-in heater and boiled by self-convection circulation loses very little heat to the atmosphere, so its heating rate is also the fastest.
- Increase the heating area of wort and speed up the evaporation efficiency. The continuous promotion of the circulation pump is equal to increasing the heating area, allowing more water molecules to escape in the form of steam.
- Improve brewing efficiency.
Disadvantages of built-in heaters
- Although a CIP cleaning ball is designed under the shroud, due to the large number of tubes, there is still insufficient cleaning power for the inner bottom of the heater.
- Because of the low-flow wort tube bundle, if the steam pressure is not well controlled or the steam temperature is too high, the wort will be overheated, which may lead to darkening of the wort color and bad taste, thereby affecting the quality of the finished beer.
How External Heaters Work
Advantages of External Heaters
- Good boiling effect can lower the pH value of the wort, so the color is also lighter.
- The number of wort cycles can be adjusted and according to the process requirements.
- It can improve the use rate of bitter substances, and protein precipitation is more thorough.
- The steam pressure is low, only about 0.3MPa, which can evaporate more volatile substances that are unfavorable to the taste
Disadvantages of external heaters
- Because the wort circulation requires a pump as power, the power consumption is high.
- The external heater is easy to cause a large amount of radiation heat loss.
- The flow rate of wort in the external heater is high, and it is easy to form a large shear force, resulting in a decrease in the quality of beer flavor.
Summarize
While steam heating has the highest upfront investment and installation costs of any heating method, steam is popular in breweries for some reasons. A large reason is that the early investment in the steam boiler can use steam heating when there are many heating needs in the brewery, such as providing heating for the CIP station.
Whether it is from a process point of view or for many batches, steam heating with better control, scalability, versatility and heating rate is the best choice. When using steam, the mash, boil and hot water tanks can be heated at the same time, which is all helpful when many brews are required per day. The initial cost is repaid by lower maintenance cost and saved time and manpower later, which also makes brewing easier.
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