MONEYMAKERS
twin benefits: Researchers of Bharat Heavy Electricals Ltd, Hyderabad, have developed a solar thermal collector that produces power as well as hot water. The new device can provide 100 litres of hot water per day at 75-80
twin benefits: Researchers of Bharat Heavy Electricals Ltd, Hyderabad, have developed a solar thermal collector that produces power as well as hot water. The new device can provide 100 litres of hot water per day at 75-80