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TECHNICAL PAPERS: Thermal Systems

Precision Temperature Control of High-Throughput Fluid Flows: Theoretical and Experimental Analysis

[+] Author and Article Information
Kevin M. Lawton, Steven R. Patterson, Russell G. Keanini

Center for Precision Metrology, Department of Mechanical Engineering and Engineering Science, University of North Carolina at Charlotte, Charlotte, NC 28223

J. Heat Transfer 123(4), 796-802 (Jan 20, 2001) (7 pages) doi:10.1115/1.1375810 History: Received June 27, 2000; Revised January 20, 2001
Copyright © 2001 by ASME
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References

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Figures

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Chilled water temperature and temperature derivative versus time, 1.9 l/min flow rate
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Chilled water spectrum and average FFT gradients versus frequency; 1.9 l/min flow rate
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Thermal gradient attenuator configuration
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Theoretical model transfer functions versus frequency
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Drum attenuator transfer functions versus frequency; measured, theoretical, perfect mixing, and diffusion for 2.5 l/min flow rate
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Measured and theoretical transfer functions versus frequency, with uncertainty bars on measured points and uncertainty envelopes for theoretical curves, where envelopes reflect uncertainty in flow rates and accumulator water levels
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Attenuator input temperature and temperature derivative versus time for an unfiltered chilled water stream with a superimposed 8.6 mHz sinusoid
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Attenuator output temperature and temperature derivative versus time for the unfiltered chilled water stream with a superimposed 8.6 mHz sinusoid

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