THE EFFECT OF PARA-ORTHO SHIFT ON HEAT EXCHANGER DESIGN IN HYDROGEN NITROGEN HEAT EXCHANGE AT HIGH PRESSURES

Abstract

The size of a H2-N2 heat exchanger condenser is exponentially a function of flow ratio of N2/H2. This is in agreement with the literature. The function is such that at 800 psia H and 20 atm (194 psia) or 33.5 atm N2 being cooled from 300 or 500 R, a straight line assumption is reasonable below the flow ratio of 5N2/H2 (the constants 2,4,5,6,7, and 8 represent 2 through 8 of N2 condensed per H2). Above this value the assumption is poor. The effect of hydrogen para-ortho shift on heat exchanger design is small at low ratios of N2/ H2 up to 3N2/H2. Above this value it becomes a minor factor and should be considered. Above 5N2/H2 the para-ortho shift affects the size of an exchange 25% or more and is a major factor.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1962
Accession Number
AD0274188

Entities

People

  • James H. Lawler

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Aviation Fuels
  • Conversion
  • Elements
  • Enthalpy
  • Fuels
  • Government Procurement
  • Heat Exchangers
  • Heat Transfer
  • Heat Transfer Coefficients
  • Heat Transmission
  • High Pressure
  • Hydrogen
  • Materials
  • Nitrogen
  • United States

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  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.
  • Groundwater Contamination Remediation.