Accession Number:

AD0416801

Title:

POLAR CONSTRUCTION EQUIPMENT - HOT-WATER CAB HEATING SYSTEM,

Descriptive Note:

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

Report Date:

1963-09-02

Pagination or Media Count:

34.0

Abstract:

An investigation was made to select a cab-heating system suitable for maximum operator comfort in air temperatures to -40F and winds up to 15 knots. Previously, design criteria had been based on air temperatures to -65 F, but a detailed study of conditions at a typical coastal polar station showed that this extreme was not essential and that a -40 F temperature and 15-knot wind would be an adequate criterion 99 percent of the time. Tests showed that, in temperatures to -40 F with winds to 15 knots, a hot-water heating system would fmmfortably heat weathertight cabs on equipment which uses liquid-cooled engines, pro vided the engine coolant was at or near its nor mal operating temperature range. During two summer seasons at McMurdo Station, hot-water heating systems on a variety of construction equipment provided satisfactory cab heating for 80 percent of the operators in tereeratures to -32 F and winds to 25 knots, but the slow warm-up of the cabs in air temperatures below -10 F was oonable. This deficiency may be overcome by controlling engine environments and by pro viding auxiliary circulating pumps for low temperature coolants. In-service testing is recommended. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE