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RESEARCH PAPERS

Measurement of Buoyancy-Induced Flow Using a Self-Heated Thermistor Flowmeter

[+] Author and Article Information
A. H. Fanney

Solar Equipment Group, National Bureau of Standards, Gaithersburg, MD 20899

B. P. Dougherty

Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Sol. Energy Eng 109(1), 34-39 (Feb 01, 1987) (6 pages) doi:10.1115/1.3268175 History: Received October 01, 1985; Online November 11, 2009

Abstract

The development and calibration of a self-heated thermistor anemometer is described. The variation in thermistor power dissipation as a function of fluid temperature and velocity is presented. The thermistor flowmeter, which evolves from this investigation, is used to measure the buoyancy-induced flow in a thermosyphon solar hot water system. Measured flow rates for a representative day are presented. A dimensionless heat transfer analysis, applied to the thermistor probe, yielded results in good agreement with classical heat transfer correlations for spheres.

Copyright © 1987 by ASME
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