| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat transfer tube for heat radiation, superior in heat radiating performance and inner fin configuration workability, and using a carbon dioxide refrigerant, and to provide a radiator of high heat radiating performance, using the heat transfer tube. <P>SOLUTION: In this heat transfer tube for heat radiation in which a carbon dioxide flows, a plurality of fins are spirally disposed on the inner face of the heat transfer tube for heat radiation, the height h of the fins is 0.15 mm or more, and a gap g between the adjacent fins is h×0.9 mm or more. Further the plurality of fins are spirally disposed on the inner face of the heat transfer tube for heat radiation, the height h of the fin is 0.20 mm or more, and the gap g between the fins adjacent to each other is 0.10 mm or more. The radiator heats water by heat exchange between the carbon dioxide of a high temperature flowing in the heat transfer tube for heat radiation, and the water of a low temperature, and supplies the heated water. <P>COPYRIGHT: (C)2007,JPO&INPIT |
