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以铜-镍合金整体低肋管和整体内外翅片管为元件,以油-水和水-水为介质对管束换热器模拟体进行了试验研究。试验结果表明,低肋管对于油-水换热,内外翅片管对于水-水换热有着比较明显的传热强化效果。在额定工况下,低肋管油-水换热模拟体的总传热系数是光滑管模拟体的1.59倍,可相应节省换热面积37%,管外油流的压力降较光管降低33%;内外超片管水-水换热模拟体的总传热系数是光滑管的1.31倍,可节省换热面积24%,管内水流的压力降比光管的提高36%。试验结果及回归的传热与流阻关联式可供工程设计参考。
The tube body heat exchanger simulation body was studied by using oil-water and water-water as media with the whole low-rib copper-nickel alloy tube and the whole internal and external finned tubes as the components. The experimental results show that the low-fin tube has the obvious effect of heat transfer enhancement on water-water heat exchange between oil-water heat exchanger and fin tube. Under rated conditions, the total heat transfer coefficient of the low-fin tube oil-water heat transfer simulation body is 1.59 times that of the smooth tube simulation body, which can save 37% of the heat exchange area accordingly. The pressure drop of the oil flow outside the tube is higher than that of the light Tube 33% lower; the overall heat transfer coefficient of the water-to-water heat transfer simulation body inside and outside the super-tube is 1.31 times of the smooth tube, saving 24% of the heat exchange area, the pressure drop of the water flow in the tube is increased by 36% . The test results and regression heat transfer and flow resistance correlation are available for engineering design reference.