介绍‘经济流速’
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><BR></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">管子的流速是任意设定的吗？不是。从流体力学可知当管内介质流速越大则阻力越大。当流速越小时，虽然流动阻力小了，对于同样的流量所需要的管径却大了，造成设备成本的升高。于是人们考虑到这两条因素取了一个合理的流速称为经济流速，人们根据流量选择管径就是依靠经济流速计算得出的。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><BR></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">介质为水时</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><BR></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">用于一般给水：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">主压力管道</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">流速：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 2</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">3m/S<BR> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">低压管道</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 0.1</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">1m/S<BR><BR></FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">工业用水：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">离心泵压力管</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 3</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">4m/S<BR> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">离心泵吸水管</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 1</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">2m/S</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">（管径小于</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">250</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">）</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><BR><FONT face="Times New Roman"> 1.5</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">2.5m/S</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">（管径大于</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">250</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">）</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><BR><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">给水总管</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 1.5</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">3m/S<BR> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">排水管</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 0.5</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">1m/S<BR><BR></FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">冷却：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">冷水管</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 1.5</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">2.5m/S<BR> </FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">热水管</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman"> 1</FONT></SPAN><SPAN style="FONT-SIZE: 13pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'">至</SPAN><SPAN lang=EN-US style="FONT-SIZE: 13pt"><FONT face="Times New Roman">1.5m/S</FONT></SPAN></P>Re: 介绍‘经济流速’
<PRE>接到原帖作者的报告，对于兰色知己的行为，我们表示遗憾，同时我们保留协助作者法律途径解决的权利；这个帖子属本站管理员原创，</PRE><PRE>详细地址见：<A href="http://www.lanbeng-pump.net/thread-253-1-1.html">http://www.lanbeng-pump.net/thread-253-1-1.html</A>；请管理员查看。</PRE><PRE>转载的其他帖子目前还没接到报告。</PRE>
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