In order to produce high-quality wine, it is very important to control the appropriate fermentation temperature in the process of grape juice cooling, clarification and fermentation.At the same time, there are colloidal substances, Tartrates and polyphenols in the wine that has just been fermented and filtered and clarified. When the environmental temperature changes greatly, haze or even precipitation will occur, which will affect the sensory quality and flavor of the wine.In addition, the fermentation process will release a large amount of heat, which will increase the temperature and affect the quality of the wine.Based on the above process requirements, it is more appropriate to select the coolant system.
The conventional coolant is mainly ethylene glycol, propylene glycol and other coolant with good cooling effect and temperature maintenance,However, the system has some corrosion problems after a long time,There is a risk of coolant leakage into the wine, so many wine manufacturers choose propylene glycol with lower toxicity. The price of propylene glycol is generally 3-4 times that of ethylene glycol, and the production cost is increased. Finally, the corrosion problem of the system has not been solved.
Glacier coolant has provided professional coolant in many wineries, which has solved the corrosion problem of equipment,Therefore, LM-4 type coolant can be used for the selection of the carrier coolant. The price is lower than that of propylene glycol, and the specific heat, thermal conductivity and viscosity are lower than those of propylene glycol, and the operating energy consumption is also low. It is a good choice.
Low temperature treatment is to reduce the temperature of newly produced wine to – 5 ℃, increase the stability and sensory quality of wine, and reduce the acid and astringent taste.The clarification temperature is generally 5 ℃, the red wine fermentation is 24 ~ 26 ℃, the white wine fermentation is 19 ℃, the low temperature treatment temperature is – 5 ℃, and it needs to be kept for 15 days at – 5 ℃.
The glacier coolant system can control the temperature accuracy of each link, reduce the operating cost of the system, and ensure the quality of wine.