Hot Water Drilling in Antarctic Firn, and Freezing Rates in Water-Filled Boreholes
NEBRASKA UNIV LINCOLN
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Hot water drilling systems are suitable for applications in which the objective is to gain rapid access to a glacier, ice sheet or ice shelf for seismic shooting, installing temperature sensors, access hole studies or retrieving stuck core drills. The Ross Ice Shelf Project RISP hot water drilling at J-9 showed that the decrease in water temperature at the nozzle was 1 C30 m 1.8 F100 ft or depth. The boiler was rated at 2.5 million watts. It produced 320 lm of water heated from 2 C to 98 C 1.75 million watts. The success of a smaller hot water system 150 kW used by PICO in 1979-80 at Dome C, Antarctica, in ambient temperatures of -40 C illustrated the speed and reliability possible under extreme environmental conditions.
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