Experimental Techniques to Determine N(sub tu) of Compact Heat Exchanger Surfaces

Abstract

Two new transient testing techniques were evaluated; the centroid method developed by Kohlmayr and the time zero intercept technique. The zero intercept method was found to be the most promising of the two but is limited to values of N sub tu < 2.5. The centroid technique can be used effectively when the value of N sub tu is less than 5.0. A heater system made of .001 inch diameter nichrome wire was designed and tested to determine its effect on the transient testing of matrix type heat exchangers. Because the design showed no improvement in the test results and was unreliable its use was discontinued.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1968
Accession Number
AD0851607

Entities

People

  • Marco J. Bruno

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Climate Change
  • Computational Science
  • Computer Programs
  • Computers
  • Diameters
  • Engineering
  • Fluid Flow
  • Heat Capacity
  • Heat Exchangers
  • Heat Transfer
  • Heat Transfer Coefficients
  • Mechanical Engineering
  • Physical Properties
  • Pressure Measurement
  • Reynolds Number
  • Specific Heat
  • Thermal Conductivity

Fields of Study

  • Engineering
  • Physics

Readers

  • Approximation Theory.
  • Combustion and Flow Dynamics.
  • Computational Modeling and Simulation