Abstract: A solar desalination system in which fresh water is derived from sea water by focussing solar ray energy from a collecting reflector onto an evaporator tube located at substantially the focal apex of the reflector. The reflector/evaporator tube assembly is mounted on a horizontal open grid platform which may support a plurality of parallel reflector/evaporator tube assemblies. The reflectors may serve as pontoons to support the desalination system unit on a body of sea water. The solar heat generated vapor is condensed in condenser tubes immersed in the sea water. Intermittently sea water concentrate is withdrawn from the evaporator tubes. Velocity of the vapor passing from the evaporator tubes to the condensers may be utilized for generating power.

Abstract: Method of and means for heat generation by producing vapor i.e., steam, by subjecting liquid to friction of a magnitude to vaporize the liquid in a substantially vertical passage into one end of which the liquid is delivered under pressure and from the opposite end of which the steam is received from the passage for use. Vaporization may be effected as part of a one-way system or of a recirculation system.