| 摘要 |
PURPOSE:To enable the heat of jets to be utilized effectively without making a heat exchanger large in, size by providing a porous metal between jet ports of a heat transfer medium and a heat transfer wall, securing the porous metal to the heat transfer wall, and allowing the jets to transfer their heat to the heat transfer wall via the porous metal after the jets hit against the heat transfer wall, and the jet stream pass through the porous metal. CONSTITUTION:The jets 16 of a high temperature heat transfer medium are jetted through the jet ports 9 formed regularly in a jet outlet plate 10 into a jet section 11. The jets 16 pass through the porous metal 13 and hit against the heat transfer wall 12. While the jets 16 transfer their heat to the porous metal 13, they strike the heat transfer wall and the heat is transferred. Part of the jets 16 hit against the heat transfer wall flowing along the heat transfer wall, while major parts thereof flow back into the porous metal 13, passing through the porous metal to transfer the remaining heat thereto, and is discharged from the jet port 15. As the heat of the discharged heat transfer medium is exchanged efficiently, the temperature thereof becomes low. As the porous metal is desirable to be of a high porosity so that the resistance to the flow of the heat transfer may be less, and also desirable to have a large heat transfer area so as to be able to transfer heat efficiently. Thus the present heat exchanger having the same volume as that of the prior art can recover a large amount of heat so as to utilize the heat of jets efficiently. |
