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RESEARCH PAPERS

Hunting of Evaporators Controlled by a Thermostatic Expansion Valve

[+] Author and Article Information
P. M. T. Broersen

Department of Applied Physics, Delft University of Technology, 2628 CJ Delft, The Netherlands

M. F. G. van der Jagt

Gas Institute, Apeldoorn, The Netherlands

J. Dyn. Sys., Meas., Control 102(2), 130-135 (Jun 01, 1980) (6 pages) doi:10.1115/1.3149591 History: Received April 29, 1980; Online July 21, 2009

Abstract

Evaporators controlled by a thermostatic expansion valve can exhibit an undesirable oscillating behavior, known as hunting. The equations describing the hunting can be characterized by an open-loop transfer function, the coefficients of which are the physical parameters of a refrigeration system. Several known experimental facts are explained theoretically by means of this transfer function, which also provides a starting point for finding new methods to improve the behavior. A particular improvement was verified experimentally.

Copyright © 1980 by ASME
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