“The system consists of several well-known and proven ... the two circulation pumps with speed control are designed for optimal efficiency. One supplies the solar loop and the other for getting ...

“In the formulation of the air-source heat pump water heater, the thermodynamic relations for the components as well as the parameters are the same as the solar-assisted heat pump,” the ...

Indu Devi, a 35-year-old widow from Suryahi village, knows the weight of despair all too well. When her husband was hanged ...