Experimental Study of the Thermal Performance Parameters of a Liquid-heating Flat Plate Solar Collector.

Abstract

From the results of this investigaiton the following conclusions are drawn: (1) The use of turbulators greatly enhanced the internal heat transfer coefficient, but unfortunately, made little difference in the overall performance; (2) The use of turbulators improved flow uniformity by increasing the pressure drop in the tubes; (3) The diameter of the headers should be larger to help ensure flow uniformity. This is especially true for low flowrate conditions such as those tested; (4) The bond conductance for the clamped fin was competitive with soldering since little gain in performance is realized after a value of 20 B/hr-ft-F is achieved; (5) The bond conductance of the woven fin configuration was unacceptable; and (6) Kalwall material was essentially opaque to far infrared radiation.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1980
Accession Number
ADA091085

Entities

People

  • Charles Dana Woodrum

Organizations

  • Air Force Institute of Technology

Tags

DTIC Thesaurus Topics

  • Computer Programs
  • Energy
  • Energy Transfer
  • Far Infrared Radiation
  • Fluid Flow
  • Heat Transfer
  • Heat Transfer Coefficients
  • Infrared Radiation
  • Long Wavelengths
  • Materials
  • Measurement
  • Plastic Explosives
  • Pressure Distribution
  • Solar Energy
  • Steady State
  • Temperature Gradients
  • Thermal Conductivity

Readers

  • Combustion and Flow Dynamics.
  • Economics
  • Thermal Physics or Thermal Science.