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ISSN Online: 2377-424X

International Heat Transfer Conference 3
August, 7-12, 1966, Chicago, USA

IDENTIFICATION OF THE FREQUENCY-RESPONSE FUNCTION A HEAT EXCHANGER BY STATISTICAL CORRELATION AND SPECTRAL ANALYSIS USING DISCRETE INTERVAL BINARY NOISE INPUT SIGNALS

Get access (open in a dialog) DOI: 10.1615/IHTC3.810
pages 149-158

Abstract

The purpose of the paper is to assess the usefulness of the correlation and spectral analysis method for determining the frequency-response function of a heat exchanger. The experiments were carried out on a concentric-tube water-to-water counter flow heat exchanger which was subjected to temperature perturbations at the tube-side inlet. The perturbations were produced by a discrete interval binary noise signal. The tube inlet and shell outlet temperature histories were converted to digital form and recorded on punched paper tape. Correlation and spectral analysis for obtaining the frequency-response function was accomplished by means of an IBM 1620 digital computer with the temperature histories on the punched paper tape as the computer input. The frequency-response function determined by the above method has been compared with that obtained by the more conventional step-response and impulse-response techniques.
The test technique, the data acquisition and reduction, the computational aspects of correlation and spectral analysis using digital methods, and the results obtained are discussed in the paper in detail.