Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0140-7007(01)00048-2
Title: An experimental and numerical study of hunting in thermostatic-expansion-valve-controlled evaporators
Authors: Mithraratne, P.
Wijeysundera, N.E. 
Keywords: Evaporator
Hunting phenomenon
Measurement
Modelling
Stability
Supply
Thermostatic expansion valve
Issue Date: Nov-2002
Citation: Mithraratne, P., Wijeysundera, N.E. (2002-11). An experimental and numerical study of hunting in thermostatic-expansion-valve-controlled evaporators. International Journal of Refrigeration 25 (7) : 992-998. ScholarBank@NUS Repository. https://doi.org/10.1016/S0140-7007(01)00048-2
Abstract: The dynamic behaviour of a thermostatic-expansion-valve (TEV)-controlled dry-evaporator is studied experimentally and numerically. Although the linear model of the TEV together with the distributed model of the evaporator is able to predict the stable dynamic response of the system adequately, it fails to reproduce the hunting behaviour that is observed under certain operating conditions. A scrutiny of the experimental data reveals the possible existence of hysteresis in the system. The distributed model including the experimentally determined input-output characteristics of the TEV is able to reproduce the main features of the hunting oscillations well. The amplitude and frequency of these oscillations depend on the static superheat setting, the heat load of the evaporator and the time constant of the TEV bulb. © 2002 Elsevier Science Ltd and IIR. All rights reserved.
Source Title: International Journal of Refrigeration
URI: http://scholarbank.nus.edu.sg/handle/10635/73167
ISSN: 01407007
DOI: 10.1016/S0140-7007(01)00048-2
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