- Author
-
Fanney, A. H.
|
Dougherty, B. P.
- Title
- Measurement of Buoyancy-Induced Flow Using a Self-Heated Thermistor Flowmeter.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
Virginia Polytechnic Institute and State Univ., Blacksburg
- Journal
-
Journal of Solar Energy Engineering,
Vol. 109,
34-39,
February 1987
- Keywords
-
thermistors
|
flow measurement
|
anemometers
|
dissipation
|
fluid temperature
|
velocity
- 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.