| 摘要 |
PROBLEM TO BE SOLVED: To improve cooling efficiency of compressed gas and compression efficiency of a second compression part in a two stage compression device. SOLUTION: Cooling water W is supplied to a back surface of a first impeller 1a. The cooling water W is scattered from an outer circumference end by centrifugal force generated by rotation of the first impeller 1a and is sprayed to the compressed gas. Since the compressed gas is directly cooled by injecting cooling water therein, cooling efficiency can be improved. Since the compressed air of which temperature is raised through the first compression part 1 enters a second compression part 2 after being cooled, compression efficiency of the second compression part can be improved. COPYRIGHT: (C)2005,JPO&NCIPI
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