“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 ...

German solar company Paxos Solar has unveiled a glass-glass photovoltaic tile that can be installed on roofs and connected to ...

The novel heat pump has three operating modes ... forced convection to absorb heat from the surrounding air, as well as solar energy. When insolation is absent during dusk or night hours, the ...