Thermal analysis of power cables in free air

Evaluation and improvement of the IEC standard ampacity calculations

Ali Sedaghat, Francisco De Leon

Research output: Contribution to journalArticle

Abstract

The thermal behavior of cables installed in free air depends upon physical parameters, such as surface emissivity, heat dissipation coefficients for radiation and natural convection, as well as induced heating from neighboring heat sources that depend on the configuration in which the cables are grouped. The IEC standard method for rating cables installed in free air considers all of these physical properties implicitly and only for particular conditions. In this paper, the IEC standard method for rating power cables installed in free air is evaluated against finite-element method simulations and laboratory experiments. A scientifically sound and accurate thermal-electric circuit for the calculation of the steady-state temperature of cables in air is derived from first thermodynamic principles. The model parameters are computed explicitly from the physical properties of the cable, cable grouping, and environment. Through numerous finite-element simulations, as well as laboratory experiments, the accuracy of the proposed method has been established.

Original languageEnglish (US)
Article number6716093
Pages (from-to)2306-2314
Number of pages9
JournalIEEE Transactions on Power Delivery
Volume29
Issue number5
DOIs
StatePublished - Oct 1 2014

Fingerprint

Thermoanalysis
Cables
Air
Physical properties
Heat losses
Natural convection
Experiments
Acoustic waves
Thermodynamics
Finite element method
Radiation
Heating
Networks (circuits)
Hot Temperature

Keywords

  • Cable ampacity
  • cable thermal analysis
  • cables installed in free air

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Cite this

Thermal analysis of power cables in free air : Evaluation and improvement of the IEC standard ampacity calculations. / Sedaghat, Ali; De Leon, Francisco.

In: IEEE Transactions on Power Delivery, Vol. 29, No. 5, 6716093, 01.10.2014, p. 2306-2314.

Research output: Contribution to journalArticle

@article{29da610d9d3a4e32bc8e548ebbcf0cfa,
title = "Thermal analysis of power cables in free air: Evaluation and improvement of the IEC standard ampacity calculations",
abstract = "The thermal behavior of cables installed in free air depends upon physical parameters, such as surface emissivity, heat dissipation coefficients for radiation and natural convection, as well as induced heating from neighboring heat sources that depend on the configuration in which the cables are grouped. The IEC standard method for rating cables installed in free air considers all of these physical properties implicitly and only for particular conditions. In this paper, the IEC standard method for rating power cables installed in free air is evaluated against finite-element method simulations and laboratory experiments. A scientifically sound and accurate thermal-electric circuit for the calculation of the steady-state temperature of cables in air is derived from first thermodynamic principles. The model parameters are computed explicitly from the physical properties of the cable, cable grouping, and environment. Through numerous finite-element simulations, as well as laboratory experiments, the accuracy of the proposed method has been established.",
keywords = "Cable ampacity, cable thermal analysis, cables installed in free air",
author = "Ali Sedaghat and {De Leon}, Francisco",
year = "2014",
month = "10",
day = "1",
doi = "10.1109/TPWRD.2013.2296912",
language = "English (US)",
volume = "29",
pages = "2306--2314",
journal = "IEEE Transactions on Power Delivery",
issn = "0885-8977",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "5",

}

TY - JOUR

T1 - Thermal analysis of power cables in free air

T2 - Evaluation and improvement of the IEC standard ampacity calculations

AU - Sedaghat, Ali

AU - De Leon, Francisco

PY - 2014/10/1

Y1 - 2014/10/1

N2 - The thermal behavior of cables installed in free air depends upon physical parameters, such as surface emissivity, heat dissipation coefficients for radiation and natural convection, as well as induced heating from neighboring heat sources that depend on the configuration in which the cables are grouped. The IEC standard method for rating cables installed in free air considers all of these physical properties implicitly and only for particular conditions. In this paper, the IEC standard method for rating power cables installed in free air is evaluated against finite-element method simulations and laboratory experiments. A scientifically sound and accurate thermal-electric circuit for the calculation of the steady-state temperature of cables in air is derived from first thermodynamic principles. The model parameters are computed explicitly from the physical properties of the cable, cable grouping, and environment. Through numerous finite-element simulations, as well as laboratory experiments, the accuracy of the proposed method has been established.

AB - The thermal behavior of cables installed in free air depends upon physical parameters, such as surface emissivity, heat dissipation coefficients for radiation and natural convection, as well as induced heating from neighboring heat sources that depend on the configuration in which the cables are grouped. The IEC standard method for rating cables installed in free air considers all of these physical properties implicitly and only for particular conditions. In this paper, the IEC standard method for rating power cables installed in free air is evaluated against finite-element method simulations and laboratory experiments. A scientifically sound and accurate thermal-electric circuit for the calculation of the steady-state temperature of cables in air is derived from first thermodynamic principles. The model parameters are computed explicitly from the physical properties of the cable, cable grouping, and environment. Through numerous finite-element simulations, as well as laboratory experiments, the accuracy of the proposed method has been established.

KW - Cable ampacity

KW - cable thermal analysis

KW - cables installed in free air

UR - http://www.scopus.com/inward/record.url?scp=84907560837&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84907560837&partnerID=8YFLogxK

U2 - 10.1109/TPWRD.2013.2296912

DO - 10.1109/TPWRD.2013.2296912

M3 - Article

VL - 29

SP - 2306

EP - 2314

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 5

M1 - 6716093

ER -