Exhaust gas heat exchanger

Heat is exchanged between exhaust gas passing through a plurality of tubes and cooling water passing through a plurality of passages defined outside of the plurality of tubes layered with each other. A heat exchanger includes a temperature decreasing portion arranged in a predetermined area on an ou...

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Bibliographische Detailangaben
Hauptverfasser:	YAMANAKA YASUTOSHI, MAEDA TAKAHIRO, KOHARA KIMIO
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	Heat is exchanged between exhaust gas passing through a plurality of tubes and cooling water passing through a plurality of passages defined outside of the plurality of tubes layered with each other. A heat exchanger includes a temperature decreasing portion arranged in a predetermined area on an outer surface of the tube adjacent to an inlet side of exhaust gas. The temperature decreasing portion is configured to decrease a temperature of a thermal boundary layer of the outer surface of the tube relative to cooling water by increasing a heat transmitting ratio between the outer surface of the tube and cooling water.