Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
SSC Tunnel Air Conditioning (Heating/Cooling and Dehumidifying)
The great distances between penetrations to the SSC tunnel create difficulties in ventilating and air conditioning the tunnel. Major penetrations were assumed for these calculations to be 8000 meters apart (one per sector) into an 8 foot diameter tunnel. The result of this large length to diameter ratio is that one cannot heat or dehumidify only from one end of the sector. Increasing the tunnel diameter to 9 feet does not affect this study; the area actually available for air flow depends on the floor design and space taken up by magnets and other equipment. For the 8 foot diameter tunnel this air flow area is taken to be 50 ft exp 2 , the full tunnel cross sectional area. The length of the tunnel results in the necessity for distributed heating and dehumidification in the tunnel. Equipment may provide sufficient heating during operations, but there are some uncertainties. Among these are rock thermal conductivity. There must be introduction of outside air and removal of tunnel air. Skidded air intake units sized for 1 mph of tunnel air flow, consuming about 100 kW each, can provide outside air during construction, when circulation of air is not possible, and during operation. (ERA citation 10:021495)
SSC Tunnel Air Conditioning (Heating/Cooling and Dehumidifying)
The great distances between penetrations to the SSC tunnel create difficulties in ventilating and air conditioning the tunnel. Major penetrations were assumed for these calculations to be 8000 meters apart (one per sector) into an 8 foot diameter tunnel. The result of this large length to diameter ratio is that one cannot heat or dehumidify only from one end of the sector. Increasing the tunnel diameter to 9 feet does not affect this study; the area actually available for air flow depends on the floor design and space taken up by magnets and other equipment. For the 8 foot diameter tunnel this air flow area is taken to be 50 ft exp 2 , the full tunnel cross sectional area. The length of the tunnel results in the necessity for distributed heating and dehumidification in the tunnel. Equipment may provide sufficient heating during operations, but there are some uncertainties. Among these are rock thermal conductivity. There must be introduction of outside air and removal of tunnel air. Skidded air intake units sized for 1 mph of tunnel air flow, consuming about 100 kW each, can provide outside air during construction, when circulation of air is not possible, and during operation. (ERA citation 10:021495)
SSC Tunnel Air Conditioning (Heating/Cooling and Dehumidifying)
T. Peterson (Autor:in) / J. Theilacker (Autor:in)
1985
25 pages
Report
Keine Angabe
Englisch
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