The USACRREL Underwater Frazil Ice Detector

by Steven F. Daly, US Army Cold Regions Research and, Engineering Lab, Hanover, United States,
John H. Rand, US Army Cold Regions Research and, Engineering Lab, Hanover, United States,



Document Type: Proceeding Paper

Part of: Cold Regions Engineering

Abstract: A modified underwater frazil ice detector has been developed at USACRREL. This detector, which operates remotely, can automatically start deicing procedures and alert operators to the presence of frazil. The detector operates by monitoring the flow rate through a small intake screen. The intake screen is, in effect, a miniature trash rack that will allow frazil ice to accumulate much quicker than the actual trash racks. This patent-pending detector was tested in the laboratory and in field conditions. The system is an economical solution to the early detection of frazil ice.

Subject Headings: Probe instruments | Solid wastes | Automation | Deicing | Flow rates | Water intakes | Field tests

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