TRANSIENT BEHAVIOR OF TWO-PHASE THERMOSYPHONS

Al-Jumaily, A.M.; Kanbour, S.I.; Al-Khatib, A.M.

Heat Pipe Technology: Volume 1. Fundamentals and Experimental Studies

ISSN Druckformat: 0-8493-9921-1

TRANSIENT BEHAVIOR OF TWO-PHASE THERMOSYPHONS

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A.M. Al-Jumaily Mechanical Engineering Department College of Engineering University of Baghdad Baghdad, Iraq

S.I. Kanbour Mechanical Engineering Department College of Engineering University of Baghdad Baghdad, Iraq

A.M. Al-Khatib Mechanical Engineering Department College of Engineering University of Baghdad Baghdad, Iraq

Abstrakt

The transient behavior of a two—phase thermosyphon during start up operation is studied analytically. A classical perturbation technique is applied to the input flow rate, source and sink temperatures in the governing equations yielding the transfer functions for the evaporator and condenser pressures in the loop. Pressure and mass flow history during start up is deduced. Model verification is obtained by using an experimental start up operation data utilizing R-ll as the working fluid.

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