Anew solar-domestic-water-heating-passive-system open-type has some advantageous features

摘要

This invention is applicable for solar water heating passive systems of the open type .The new solar system comprises in major from, collectors of lowered type(12) primary storage-cylinder(21) optional secondary storage cylinder(22) both cylinders lowered in level within back of said collectors, thermal-expansion-valve(51) placed at exit of said collectors on line(63) and optional thermal-expansion-valve(52) placed at hot exit of primary-cylinder(21) on bleeding line(67) .The new system harvests solar energy initially by heating its water contained within its isolated collectors those equipped with relatively large size internal-exit- headers(16) thereafter, valve(51) opens way for hot enough water to pass from said headers(16) to storage cylinder on the back where the latter’s may dip below tops of collectors as they are protected by said valve(51) which prevents any reverse for the main operating thermo-siphon loop, in addition secondary cylinder(22) stores additional volume of hot water within confined depth behind said collectors, in addition, valve (52) opens way for exceedingly hot water to pass from cylinder(21) to either cylinder(22) or to supply tank (41) that is separate for hot water alone See figure below