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Frequency response of different size concentric tube heat exchangers
Author(s) -
Fisher D. G.,
Kadlec R. H.
Publication year - 1970
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450480410
Subject(s) - concentric tube heat exchanger , heat exchanger , mechanics , concentric , baffle , materials science , heat transfer , reynolds number , shell and tube heat exchanger , micro heat exchanger , thermodynamics , tube (container) , attenuation , heat transfer enhancement , dynamic scraped surface heat exchanger , volumetric flow rate , plate heat exchanger , heat transfer coefficient , turbulence , physics , mathematics , composite material , critical heat flux , optics , geometry
The frequency response of a concentric tube heat exchanger was investigated theoretically, and experimentally, on four different size heat exchangers. Transfer functions, for the response of both shell and tube fluid outlet temperatures to disturbances in either flow rate were derived. Experimental results for water‐glycol systems show that the mathematical model accurately predicts the frequency response of large heat exchangers operated at high Reynolds numbers. However, the attenuation and phase shift of the fluid outlet temperatures become significantly greater than predicted by the model when heat exchanger size is decreased or experimental conditions are changed to increase axial mixing.