Schematic

Working principle of Solar Steam Cooking System :

In the focus of each pair of Scheffler Concentrator (dishes), the sleeping dish and standing dish, are placed heat exchangers called receivers.

The Solar rays falling onto the dish  are reflected and concentrated on the receivers placed in its focus. Due to concentration the temperature achieved is very high (between 450-650 degree centigrade) and thus the water in receivers comes to boiling and becomes steam.

Above the receiver is an insulated header pipe filled half with water. The cold water enters the the receiver through inner pipe, gets heated due to the high temperature of the concentrated rays and the heated water goes up.  The cold water again enters through inner pipe and and the cycle continues till steam is generated. The steam gets stored in the upperhalf empty portion of the header pipe and pressure keeps on rising. The steam is than drawn / or sent to kitchen through insulated pipe line.

Spurred by the success of the above system, with training and jigs provided by Gadhia Solar, the Brahma Kumari's installed the world's largest solar steam cooking system at their Taleti Ashram in Abu Road, Rajasthan. This system installed in 1999, cooks upto 35,000 meals a day.

Gadhia Solar has manufactured and installed many solar steam cooking system since than on Turn-Key basis - starting for system for 500 people per day (1,000 meals per day) to 15,000 persons per day (30,000 meals per day)