Author(s): G. S. H. Lock
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Abstract: The Built Ice Veil Assessment (BIVA) Project began as a result of discussions on various types of dams which might be built downstream of the Peace-Athabasca Delta in northern Alberta. The suggestion of a veil or curtain of ice produced by a row of thermal syphons or heat pipes raised a great deal of interest, largely because of economic, logistical and ecological benefits. However, the absence of any heat transfer and fluid flow data for a row of closely spaced pipes standing above and below the ice cover meant that such a veil could not then be built. The project divides naturally into two parts: thermal syphon studies and ice studies. To date the syphon studies have consisted of extensions to the work of Bayley & Lock (1964) and Lock & Maezawa (1976). Recent data reveal the effect of large length-diameter ratios (up to 50:1) on the heat transfer rates in the single-phase system; the data also explore the effect of the heated length-cooled length ratio. The ice studies are subdivided into two related components: fluid flow near closely-spaced pipes and cylindrical ice growth in the presence of forced convection. The fluid mechanics experiments have systematically determined the effect of Reynolds number and gap-diameter ratio on pressure drop across a row of pipes in a cross flow. The ice growth experiments have been compared with theoretical predictions for a variety of conditions; they reveal fair agreement.
Year: 1986