ISSN Online: 2377-424X
International Heat Transfer Conference 3
IDENTIFICATION OF THE FREQUENCY-RESPONSE FUNCTION A HEAT EXCHANGER BY STATISTICAL CORRELATION AND SPECTRAL ANALYSIS USING DISCRETE INTERVAL BINARY NOISE INPUT SIGNALS
Résumé
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.
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.