It just needs 7 hours to lower temperature of the fermenting liquid from to -1 centidegree 12 centidegree The beer age can be reduced by 6days at most. And the output can be increased by 20% without adding fermenters. The effect will be excellent especially in summer.
It can reduce consumption of electricity by 9%. That is, it decreases the beer cost.
The temperature can be controlled automatically in 0.25 centidegree or so.