The thermal resistance between cables and a surrounding pipe or duct wall

Buller, F. H.; Neher, Jack

doi:10.1109/t-aiee.1950.5060157

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Calculation Of Oil Film Thermal Resistances1

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1952

1996

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Cited by 19 publications

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“…The thermal capacity of the oil is arbitrarily assumed to be 104 W-min/gal/°C rise in (3) Btu/h = 355 X gal/min X oil temperature change°C (3) watts = 104 X gal/min X oil temperature change 'C. (4) This total heat withdrawal from the oil was then divided by 12 to come up with an approximate figure of heat per foot flowing through the pipe film. Here the thermal resistance of the pipe oil film Rpf was determined by Rpf=-AT/W/ft.…”

Section: Calculation Of Oil Film Thermal Resistancesmentioning

confidence: 99%

Forced-Cooling Model Tests

Zanona

Williams

1970

IEEE Trans. Power Appar. Syst.

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This paper describes the forced cooling of a model of a pipe-type cable circuit, utilizing mechanical refrigeration to cool the pipe-filling oil. Measured oil film thermal resistances and oil chiller performance are reported. Two pipe-filling oils were tested, a highviscosity oil normally used for pipe-type cable and an experimental low-viscosity polybutene. The test results are expected to have an important effect on the design of future field installations of forcedcooled pipe-type cable circuits.Paper 69 TP 708-PWR, recommended and approved by the Insulated Conductors Committee of the IEEE Power Group for presentation at

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Section: Calculation Of Oil Film Thermal Resistancesmentioning

confidence: 99%