Abstract: An energy generation system includes a motive fluid which is alternately heated and cooled to drive a heat engine. An inexpensively built and operated system heats the motive fluid with solar radiation and cools it with atmospheric or wind cooling. Low cost solar heat collectors are fabricated with aluminum foil or aluminized Mylar reflective surface overlying parabolically shaped paperboard bases. Low cost fluid cooling devices are fabricated from various fluid carrying porous canvas bags, some being provided with wind catching devices.

Abstract: An apparatus for generating power from the temperature difference between two bodies of fluid, one of which is heated by trapping solar energy in a dome and the other one of which is cooled by wind passing beneath an airfoil. A pair of heat exchange basins are provided into which hot and cold fluid is supplied, with heat exchange coils disposed therein for developing a differential pressure which is transmitted to opposite sides of a piston. The fluid temperature in each heat exchange basin is reversed by gravitational action so that piston motion can be reversed for pumping action.

Abstract: Two spaced-apart closed pipes containing a vaporizable working fluid are each successively heated by focusing sun rays on the pipe and then chilled by directing wind along the pipe while shielding the pipe from the sun rays. As one pipe is heated, the other is chilled so that a pressure differential is built up therebetween in the working fluid. A piston in a pump has opposed shafts which push and pull the piston, with an end of each arm forming a moving sealed closure for each of the closed pipes which communicates with the working fluid therein.