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Boiling enhancement in a mini-channel of a three-phase circulating fluidised bed

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Original languageEnglish
Title of host publicationICMM 2005: 3rd International Conference on Microchannels and Minichannels, Pt B
Place of PublicationNEW YORK
PublisherAmerican Society for Mechanical Engineers
Pages73-80
Number of pages8
ISBN (Print)0-7918-4185-5
Publication statusPublished - 2005
Event3rd International Conference on Microchannels and Minichannels - Toronto, Canada
Duration: 13 Jun 200515 Jun 2005

Conference

Conference3rd International Conference on Microchannels and Minichannels
CountryCanada
Period13/06/0515/06/05

Abstract

In fouling, the accumulation of poorly conducting materials on the surface of process equipment, results in an increased resistance to heat transfer and hence reduces heat exchanger effectiveness. Under most conditions fouling is more severe during boiling heat transfer, due to the mechanisms of bubble formation and detachment. Thus, in order to enhance heat transfer and mitigate fouling in boiling processes, a new type of vapour-liquid-solid (three-phase) circulating fluidised bed boiling system has been designed, combining circulating fluidised bed technology with boiling heat transfer. Experiments are conducted in a glass mini-channel of square cross sectional area 21.5 mm x 11mm, height 1000mm, and fitted with an electrically heated cartridge heater rod of 8mm diameter x 730mm length. The set-up uses stainless steel balls to investigate the effect of particle properties (specifically particle size) on three-phase boiling heat transfer enhancement. Experimental results show that overall, compared with two-phase flow boiling, the presence of solid particles in the three-phase boiling system augments the heat transfer coefficient. Results are presented and discussed.

    Research areas

  • SCALE FORMATION

Event

3rd International Conference on Microchannels and Minichannels

13/06/0515/06/05

Canada

Event: Conference

ID: 5221334