In our previous discussion, we talked about the heating methods used in a beer brewing system. In fact, there’s another component in the system that can also be considered part of the “heating” process — the heat exchanger. During operation, the heat exchanger transfers heat between different media, and one of them inevitably absorbs heat. Therefore, it can also be regarded as a form of “heating.”
In beer brewing systems, the most commonly used types of heat exchangers include the following:
~ Plate heat exchanger:
~ Shell and Tube Heat Exchanger:
~ Tubular Heat Exchanger:
Let’s take a closer look at these three types of heat exchangers.
Plate heat exchanger:
Double section type:
Generally, the wort can be cooled down using a plate heat exchanger. It’s typically a double section type plate heat exchanger, with one section for glycol water and one for city water. When the wort enters the plate heat exchanger, the city water first exchanges heat with the wort, cooling it to approximately 35–40°C. The wort then enters the second section, where it exchanges heat with the glycol water, ultimately cooling it to the target fermentation temperature (8–20°C). The cooled wort then enters the fermenter.
Advantage: Double section plate heat exchanger offers faster, more energy-efficient, and more stable cooling, making it the most commonly used cooling solution in beer production.
Single section type:
In general, medium and large brewing systems, or breweries that require high production efficiency, are typically equipped with a cold liquor tank. The cold liquor tank helps improve cooling efficiency, supports multiple consecutive brews per day, and enables energy savings through hot water recovery. In these cases, a single-stage heat exchanger can be used. Cold water (treated cold water) flows in and out. The wort enters the heat exchanger, exchanging heat with the cold water. This cools the wort, warms the cold water, and then is transferred to the hot water tank for reuse.
Shell and Tube Heat Exchanger:
In large-scale equipment, the hot water tank has a large capacity. To prevent insufficient heating and improve efficiency, a shell and tube heat exchanger is often used to heat the hot water tank. Steam enters the shell and tube heat exchanger to heat the water.
Advantage: Shell-and-tube heat exchangers feature a simple and reliable structure, offering excellent resistance to high temperatures and high pressures. They are less prone to clogging, making them ideal for fluids containing solid particles or high-viscosity media. They are also well suited for applications requiring large flow rates and large heat transfer areas.
Tubular Built-in Heat Exchanger:
When the kettle tun volume is large, simply using a steam jacket for heating will not provide sufficient heating. Therefore, a tubular heater is added to the kettle tun to improve heating efficiency and ensure more even heating of the wort.
Advantage: The advantage of using this type of heater is that it can bring the wort to a boiling temperature more quickly, saving both energy and time.
In conclusion, heat exchangers play a critical role in ensuring efficiency, energy savings, and process stability in modern beer brewing systems. From wort cooling to hot water preparation and kettle heating support, each type of heat exchanger—plate, shell and tube, and tubular—serves a specific purpose depending on brewery size, production goals, and process design. By selecting the right heat exchanger configuration, breweries can achieve precise temperature control, improve brewing efficiency, and optimize energy utilization. At SDET, we leverage our engineering expertise to integrate the most suitable heat exchanger solutions into each brewing system, helping brewers achieve consistent quality, reliable performance, and scalable production for long-term success.
