Bernath L Knecht

US Patent:

43089127, Jan 5, 1982

Filed:

Mar 28, 1979

Appl. No.:

6/024878

Inventors:

Bernath L. Knecht - Worthington OH

International Classification:

F28D 1500
G05D 2300

US Classification:

165 32

Abstract:

A heat transfer system is provided having a fluid evaporator and a fluid condenser interconnected by fluid conducting conduit and including a volatile fluid as the heat transferring medium. The evaporator is incorporated in a solar panel and the condenser is disposed in heat transferring relationship to a water tank. A temperature control device including on a liquid accumulator tank and a pressure responsive valve is interconnected in the system and is operable to permit or prevent return of condensed fluid to the evaporator. One embodiment has the condenser disposed a distance vertically above the evaporator to provide a gravity return of liquid. A second embodiment of the system has the condenser and water tank disposed a distance vertically below the evaporator and the system additionally includes a device for intermittently returning liquid from the condenser to the evaporator at periodic intervals. The device for returning liquid includes a liquid collector tank positioned to receive liquid returned by gravity from the condenser and having a float actuated valve mechanism to alternatively prevent or permit fluid flow to the condenser whereby vaporization of fluid by the evaporator will develop gas pressure to return liquid from the collector tank to the evaporator through an intermediate liquid holding tank. A check valve is connected between the accumulator tank and holding tank to isolate the tanks during liquid return operation.