换热器传热强化的管束试验研究

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－水为介质为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％；内外翅片管水－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

Experimental Study of Tube Bundle on Heat Transfer Enhancement of Heat Exchangers

Taking the integral low rib tube and the integral internal and outer rib tube of cup per-nickel alloy as the elements and the oil-water,water-water as the medium,a tube bundle tests of modeling heat exchangers have been done.The experimental results have shown that the integral low rib tube and integral internal and outer rib tube is effective ob viouslly for oil-water and water-water heat exchanger respectively.Under the specified conditions,their over all heat transfer coefficient is as much as 1.59 and 1.31 times of plain tube heat exchanger,or their heat exchanger area can be cutdown by 37% and 24% respectively;the pressure drop of shell side oil stream and tube side water stream is 33% lower and 36% higher than that of plain tube respectively.Experimental results and re gressing correlation of heat transfer and pressure drop can be use for engineering design.