强化换热

<strong><font size="4">2、强化换热管比较</font></strong><p align="center" style="LINE-HEIGHT: 150%;"><br/><strong><font size="4"><img height="130" src="http://www.neegeen.com/tube/image/xlg.JPG" width="600" border="0" alt=""/></font></strong></p><p align="center" style="LINE-HEIGHT: 150%;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;">图</span><span lang="EN-US" style="FONT-SIZE: 12pt;">4 </span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;">漩流管</span><span lang="EN-US" style="FONT-SIZE: 12pt;">(</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;">三螺旋</span><span lang="EN-US" style="FONT-SIZE: 12pt;">)</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体;">：特点为大升角浅螺旋槽</span></p><p align="center" style="LINE-HEIGHT: 150%;"><img height="180" src="http://www.neegeen.com/tube/image/raoliuguan1.JPG" width="600" border="0" alt=""/></p><p align="center" style="LINE-HEIGHT: 150%;">图5 多向扰流强化换热管：特点为大升角浅螺旋槽、左旋和右旋交叉产生漩流和涡流双作用强化换热</p><p align="center" style="LINE-HEIGHT: 150%;"><img height="129" src="http://www.neegeen.com/tube/image/luowenguan.JPG" width="600" border="0" alt=""/></p><p align="center" style="LINE-HEIGHT: 150%;"><span style="FONT-FAMILY: 宋体;">图</span><span lang="EN-US">6 </span><span style="FONT-FAMILY: 宋体;">波螺管（普通单螺纹管）：特点为螺旋槽密集、槽深而锐利、水阻大、存在严重的应力腐蚀</span></p>