of milk are pasteurised using steam generated by a Concentrated Solar Thermal (CST) system at the Tamil Nadu Cooperative Milk Producers Federation (popularly known as Aavin), in Sholinganallur.
78 deg Celsius
temperature to which milk is heated during pasteurisation using steam. The steam was generated through a boiler using furnace oil as fuel. But now, the CST has replaced at least a portion of the furnace oil.
such systems are now in place. A similar system was installed at the Salem dairy last year.
Rs. 1.20 crore
cost of the system at Sholinganallur Rs. one crore has been provided by the State government and Rs. 20 lakh by the Ministry of New and Renewable Energy.
Rs. 2.20 lakh
per month will be saved on use of furnace oil. In five years, the cost incurred would be recovered, explained an engineer associated with the project.
out of Aavin’s 299 bulk milk coolers use solar water heaters for cleaning the systems. Aavin has been using solar power systems to heat water in all dairies in Chennai.