ISBN-13: 9783659969836 / Angielski / Miękka / 2016 / 68 str.
Man has needed and used energy at an increasing rate for his sustenance and well being ever since, he came on the earth a few million years ago. Primitive man required energy primarily in the farm of food.Subsequently he discovered fire and its energy needs increased as he started to make use of food and other bio-mass to supply a energy needs for cooking as well as for keeping himself warm.As all conventional energy fast depleting, it has became unavoidable to go for unconventional energy sources.In this project, a flat type solar collection is used to collect solar energy in the form of heat energy. This Solar still used for dry the fruits,grains and water purifier.