Method for generating electricity with solar heat pipe absorber

A method for generating electricity with a system comprising a water tank, an electricity generating plant and a parabolic trough solar power plant, said method comprising:

• transferring water from the water tank to the solar power plant;
• receiving the water into a helical pipe located within a glass pipe encasing an absorber tube of a parabolic trough solar power plant, wherein the glass pipe and the helical pipe extend from a first end to a second end of a parabolic trough along a central axis of the glass pipe and a central axis of the helical pipe is concentric with the central axis of the glass pipe;
• during periods of high irradiance:
• converting the water in the helical pipe to steam by focusing solar radiation on the absorber tube;
• heating sand in a sand filled pipe surrounded by the helical pipe, wherein the sand filled pipe extends from the first end to the second end of the parabolic trough along the central axis of the glass pipe;
• expelling the steam from the helical pipe into steam holding tanks;
• during periods of low irradiance:
• releasing, by a solenoid valve connected between the helical pipe and an inner pipe, the water within the helical pipe to the inner pipe located within the sand filled pipe;
• and
• converting the water in the inner pipe to steam by heat exchange with the heated sand in the sand filled pipe;
• and
• expelling the steam from the inner pipe into the steam holding tanks;
• transferring the steam to a turbine of the electricity generating plant to generate mechanical energy in the turbine, wherein the turbine is mechanically connected to a dynamo;
• transferring the mechanical energy to the dynamo to turn the dynamo and generate electricity.