Solar Energy for India's Dairy Industry

Related Vendors

EDL Anlagenbau Gesellschaft mbH

Pörner Ingenieurgesellschaft mbH

ProMinent GmbH

A single solar dish delivers energy for pasteurization of up to 30,000 liters of milk and cleaning in place (CIP) of milk storage tanks on a clear sunny day at Latur. It continues to save about 20,000 liters of furnace oil per annum for the dairy.

Like a sunflower, the dish automatically tracks the sun from sunrise to sunset on both East-West and North-South axes to intercept maximum sunlight throughout the year, irrespective of the installation location. It is mounted on a single column, thus occupying ground area of less than 3m x 3m.

Steam Production with Solar Energy

The basic operation philosophy of the steam generation system is simple. The receiver at the focus of the dish transfers the heat of solar radiation to a heat transfer medium such as water. Once the water is converted into steam and desired pressure and temperature is achieved, the steam is delivered to the application area or the common boiler header.

Construction and Operation

• At the start of the day, the system receives water at ambient temperature and after heating up the water sends it to insulated water storage tank

• The water gets circulated in the dish using centrifugal pump in the day time

• The 4.5m³ pressurized hot water storage tank stores the hot water and supplies the same whenever required to milk heat exchanger

• The hot water supplied to heat exchanger returns back to the storage tank at a lower temperature and it gets heated again by solar heat

• The milk gets pasteurized using the solar hot water and heat exchanger and is delivered for packing

• The solar hot water is also used for CIP, can washing etc

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