Hydraulic pump driven by low‐level temperature difference

摘要

AbstractA proposal is made for a non‐electric hydraulic pump driven by the temperature difference between two low‐level heats. The pump consists of a warm‐water boiler, a condenser and a pump chamber in which a balloon is installed. A difference in vapour pressure of a working fluid, such as Freon, between the boiler and the condenser makes the balloon repeat expansion and contraction, and consequently water is pumped up from under ground to the ground, for example. Open/shut operation of the valve is performed by the balloon's expansion‐contraction. Also, no auxiliary pumps are required at the boiler and co