Signatur:
ZSP-202-95
In:
Research report / Cold Regions Research and Engineering Laboratory, 95
Beschreibung / Inhaltsverzeichnis:
Summary: An investigation was conducted at Camp Century, Greenland, to study the feasibility of using air wells to cool undersnow structures in the arctic during the summer months. From results obtained during the summers of 1959,and 1960 and late November, 1960, it was found that the air well is a practical and effective means of providing a -20°C air supply at volumetric flow rates of 1200 to 1700 ft^3/min. The extent and rate of warming of the snow beneath the trench floor by heat exchange between the air and the snow foundation was found to depend upon trench air temperature, fan capacity, fan arrangement, and casing length. For example, in a well cased to a depth of 17. 5 ft and equipped with a 5 hp fan drawing in air at a rate of 1700 ft^3/min, the maximum warming was found to be 12.5°C during a 42-day period. Snow temperature differences of about 7°C were found between similar trenches with and without a fan installation. The minimum permissible distance between two adjacent fans to eliminate, overlap in warming up the snow foundation is approximately 80 ft.
Materialart:
Schriftenreihen ausleihbar
Seiten:
iv, 17 Seiten
,
Illustrationen
Serie:
Research report / Cold Regions Research and Engineering Laboratory 95
URL:
https://hdl.handle.net/11681/5877
Sprache:
Englisch
Anmerkung:
CONTENTS
Preface
Summary
Theoretical background
Test method and equipment
Test operations
Effectiveness of the air well
Estimation of fan capacity
Natural cooling in winter
Change of trench foundation temperature
Trench wall warm-up
Conclusions and recommendations
Standort:
AWI Archiv
Zweigbibliothek:
AWI Bibliothek
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