- Author
- Fanney, A. H. | Dougherty, B. P.
- Title
- Self-Heated Thermistor Flowmeter for Flow Measurement in a Thermosyphon Solar Hot Water System.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Book or Conf
- American Society of Mechanical Engineers (ASME). Solar Energy Conference. Proceedings. SED 8th Annual. April 13-16, 1986, Anaheim, CA, 1-10 p., 1986
- Keywords
- thermistors; flowmeters; flow measurement; calibrating; dissipation factor | thermal analysis | thermal conductivity
- Identifiers
- solar waterheaters; thermosyphons
- 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. A thermal analysis of the glass-encapsulated thermistor bead is described which leads to an experimental technique for determining the effective radius and thermal conductivity of the thermistor probe. A dimensionless heat transfer analysis is performed and the results compared to empirical correlations. The thermistor flowmeter, which evolves from the investigation, is used to measure the buoyancy-induced flow in a thermosyphon solar hot water system.