Prediction of Noise Generated by Expansion Devices Throttling Refrigerant
Author(s)
Singh, G.M.
Rodarte, E.
Miller, N.R.
Hrnjak, P.S.
Issue Date
2000-04
Keyword(s)
acoustic signal propagation
Date of Ingest
2009-05-26T22:40:31Z
Abstract
A method is presented for predicting the noise generated by expansion devices throttling
refrigerant, based on an existing standard model for predicting the noise downstream of large,
industrial control valves throttling air. The presented method can be used to predict the noise
downstream of any expansion device of any size for any pure two-phase or pure vapor
refrigerant flow. Comparison of the model predictions to experimental data for orifice tubes,
capillary tubes, and refrigerant valves show excellent agreement over a wide range of operating
conditions. Experimental results for the attenuation of sound waves in a two-phase refrigerant
flow are also presented, as well as direct comparisons of the noise generated by different
expansion devices over similar operating conditions.
Publisher
Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
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