黄河是国内外著名的多泥沙河流,对长期航行在这种流域的船舶为延长船舶动力装置及主辅机的使用寿命等必须采用“舷外冷却”。目前在黄河中使用较广泛、较成功的“舷外冷却”为一种直接焊装在船舶吃水线以下船壳板上的封闭箱体,以船壳作为换热面,依靠船舶航行时的水流冲刷,达到冷却腔内高温水的目的。(见图1所示) The Yellow River is a famous multi-silt river at home and abroad. It is necessary to adopt “outboard cooling” to prolong the service life of the marine power plant and the main and auxiliary machinery of ships sailing in such waters for a long time. Currently used more widely in the Yellow River, the more successful “Outboard Cooling” is a closed tank directly welded to the hull below the waterline of the ship, the hull as the heat transfer surface, rely on the water when the ship sailing Scour, to achieve the purpose of cooling the cavity high temperature water. (See Figure 1)