1 Reply Latest reply on Dec 16, 2014 8:05 AM by Glenn Schroeder

    hi all i have a problem

    Thaafer Hamzah

      hi all i work in concentric pipe(steel pipe with glass envelop) subjected to solar energy change with time, this pipe is closed from two ends, so during the solution the temperature increases  but the static pressure stay the same(101324 pa),the question is , why  the pressure do not increases too..thanks