Ice pigging coolant jackets: Thermal analysis of the rate of ice melting

Dan McBryde, Alastair Hales, Joe Quarini, Alex Jenkins, Eddie Lucas, Xiao Yun

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

This paper describes an investigation into the use of ice pigging to clean individual independent sections of a coolant jacket from a large cylindrical storage vessel where sediment deposited on the interior walls of the coolant jacket could limit heat transfer. Removal of sediment can restore any deterioration of the heat transfer performance. The contents of the tank are at a constant 45⁰C; therefore there will be considerable heat gain into the ice pig body. For the ice pig to remain effective at removing sediment, the ice fraction ( 휙푣,푐푎푓) needs to remain higher than 60% at the exit of the cooling jacket.
A large scale model of the tank coolant arrangement was constructed, sharing the same depth and height as the real artefact, but the length was reduced by ten times in order to fit in the laboratory. To ensure a means of heat input, water from a heated tank was circulated to replicate the constant internal temperature of the storage tank. The coolant jacket was ice pigged whilst the inlet and outlet temperature of both fluid streams were measured; heat transfer calculations were completed to assess the heat gain to the ice pig and therefore the rate of ice melting.
Original languageEnglish
Title of host publicationProceedings of 14th UK Heat Transfer Conference (Edinburgh, 7-8 Sept 2015)
Number of pages9
Publication statusPublished - Sep 2015
Event14th UK Heat Transfer Conference - Edinburgh, Edinburgh, United Kingdom
Duration: 7 Sep 20158 Sep 2015

Conference

Conference14th UK Heat Transfer Conference
CountryUnited Kingdom
CityEdinburgh
Period7/09/158/09/15

Keywords

  • Ice pigging
  • nuclear decommissioning
  • Melting

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