Numerical analysis of heat losses by main heat pipelines under conditions of complete or partial flooding

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Abstract

A two-dimensional problem of the nonstationary temperature field of a main heat pipeline and of its environment under conditions of complete or partial flooding has been solved numerically. At the boundary of the contact between the outer surface of the pipeline and water the presence of evaporation was taken into account. It has been revealed that under typical operating conditions of main heat-supply systems the flooding of the heat pipeline channel leads to a more than 5.5-fold increase in heat losses. It is shown that in order to estimate the heat losses one may use a one-dimensional model of the system considered. It has been established that for heat pipelines operating under conditions of flooding, the domain of solution of the problem can be bounded by the outer boundary of the pipeline.

Original languageEnglish
Pages (from-to)323-331
Number of pages9
JournalJournal of Engineering Physics and Thermophysics
Volume81
Issue number2
DOIs
Publication statusPublished - 1 Mar 2008

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Heat losses
Numerical analysis
Pipelines
Evaporation
Temperature distribution
Hot Temperature
Water

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering

Cite this

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abstract = "A two-dimensional problem of the nonstationary temperature field of a main heat pipeline and of its environment under conditions of complete or partial flooding has been solved numerically. At the boundary of the contact between the outer surface of the pipeline and water the presence of evaporation was taken into account. It has been revealed that under typical operating conditions of main heat-supply systems the flooding of the heat pipeline channel leads to a more than 5.5-fold increase in heat losses. It is shown that in order to estimate the heat losses one may use a one-dimensional model of the system considered. It has been established that for heat pipelines operating under conditions of flooding, the domain of solution of the problem can be bounded by the outer boundary of the pipeline.",
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AB - A two-dimensional problem of the nonstationary temperature field of a main heat pipeline and of its environment under conditions of complete or partial flooding has been solved numerically. At the boundary of the contact between the outer surface of the pipeline and water the presence of evaporation was taken into account. It has been revealed that under typical operating conditions of main heat-supply systems the flooding of the heat pipeline channel leads to a more than 5.5-fold increase in heat losses. It is shown that in order to estimate the heat losses one may use a one-dimensional model of the system considered. It has been established that for heat pipelines operating under conditions of flooding, the domain of solution of the problem can be bounded by the outer boundary of the pipeline.

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