| 摘要 |
PROBLEM TO BE SOLVED: To carry out miniaturization of a heat exchanger and to improve efficiency of heat exchange in a heat exchanger for latent heat recovery recovering heat of exhaust gas. SOLUTION: Heat exchange tubes 30 of a hollow tube formed with a groove 36 and wavelike uneven parts 33, 34 are plurally arranged in parallel with each other such that a longitudinal direction becomes a vertical direction, and a heat exchange medium is passed through from a lower inlet 31 to an upper outlet 32. By providing guide walls 43, 44 in a shell 40, and passing through exhaust gas from an upper outlet 41 to a lower outlet 42, the exhaust gas is cambered in a gap between passages 46a-46d and the plurality of heat exchange tubes 30. Since the exhaust gas and the heat exchange medium become counter currents as a whole, and a secondary flow is caused in the exhaust gas by the wavelike uneven parts 33, 34, heat exchange efficiency is improved. Since it is arranged such that the longitudinal direction becomes the vertical direction, and the groove 36 and the wavelike uneven parts 33, 34 are formed, downward drain of condensed water can be promoted. COPYRIGHT: (C)2011,JPO&INPIT |
