Cooling jacket method in beer fermentation equipment?
The fermentation tank is one of the important equipment in the beer brewing process. The beer fermentation process is a normal life activity carried out by yeast under certain conditions by utilizing fermentable substances in wort. Yeast will generate heat during the fermentation process. In order to allow fermentation and post-ripening to proceed at the set process temperature, cooling must be carried out.
There are two cooling methods: indirect cooling method: the cooling jacket passes a mixture of ethanol or ethylene glycol and water (refrigerant); direct cooling method: the refrigerant in the cooling jacket is liquid ammonia. There are two commonly used cooling jacket methods in beer fermentation equipment, one is dimple jacket and the other is coil jacket.
What is a dimple jacket?
dimple jacket board is a board made of two thin stainless steel plates, which are perforated and firmly bonded to both sides of a thicker honeycomb core material. It is also called a honeycomb sandwich structure. It has the characteristics of light weight, sound insulation effect and good elasticity.
function
The function of the dimple jacket is to reduce the temperature of the fermentation tank. Compared with ordinary jackets, the honeycomb jacket equipment greatly reduces the thickness of the jacket wall and the inner cylinder wall, reducing manufacturing costs. From the perspective of heat transfer, the gap of the honeycomb jacket is smaller than that of the ordinary jacket, the flow area is smaller, the flow rate of the fluid in the cavity increases significantly, and a large number of honeycombs act as spoilers in the jacket. When the fluid flows through the honeycomb points, it continuously changes its flow direction and speed, forming turbulent vortices to accelerate heat exchange and greatly increase the heat transfer effect.
What is a coil jacket?
Coils consist of a set of parallel metal tubes that are bent into a circular or oval shape to form a coil. It has the characteristics of high heat exchange efficiency, simple structure, easy installation and maintenance.
principle
In beer equipment, coil jackets are often used to control fermentation temperature and cool beer. It achieves cooling and heat preservation effects by utilizing the heat exchange area of the coil jacket. In a coil jacket, a heat exchange fluid (such as cooling water or refrigerant) flows through metal tubes, taking heat away from or transferring heat to the beer equipment. Due to the larger heat exchange area of the coil jacket, the temperature of the beer equipment can be controlled more effectively.
Tiantai's fermentation equipment adopts dimple jacket double-stage cooling, which mainly covers the cone bottom and straight wall. We introduced automatic punching equipment and designed the punching distance and stamping arc of the dimple jacket according to the pressure maintaining requirements of the tank, strictly in accordance with the drawing design. stamping. The Miller board has a consistent honeycomb shape, which makes the tank evenly stressed when maintaining pressure. Such a tank jacket is automatically formed, has a reasonable layout, uniform punching without scratches, long service life, and strong pressure-bearing capacity.
dimple jacket are generally used in fermentation tanks of less than 20 tons. Due to the uniform cooling, they can make up for the shortcomings of insufficient thermal convection of the wine inside some small tanks.
Coiled pipe is used for large tanks such as 50 tons, 100 tons, 300 tons, and 600 tons. By realizing automatic machine welding, it can reduce labor costs and reduce the instability of manual welding. Since the heat convection inside the large tank is relatively intense, even if the coiling does not have a good turbulence effect, the tank will not freeze.
To sum up, there are differences in heat exchange efficiency, structural form and application range between dimple jacket or coils for fermentation tanks in beer equipment. It is necessary to choose the appropriate jacket method according to the specific usage scenarios and requirements.
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