为什么说中空玻璃优于双层窗
<P><FONT size=2> </P><P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中空玻璃和双层窗都是具有保温、节能功能的窗结构。但是，中空玻璃的综合性能优于双层窗，其优势体现于以下方面：</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><FONT face="Times New Roman"> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><FONT face="Times New Roman">1.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">施工方便</SPAN></P>
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<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">双层窗具有两层框架，两套安装结构，安装过程复杂烦琐，造价并不低廉；中空玻璃除槽口尺寸较宽外，其他结构和安装过程与单层窗没有多大区别，相比之下，施工过程简单方便，施工费用降低。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><o:p><FONT face="Times New Roman"> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><FONT face="Times New Roman">2.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">光学性能</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><o:p><FONT face="Times New Roman"> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">双层窗从结构上讲，具有四个表面，更易落上灰尘，而且双层窗的中间部分是很难擦拭的，因此，从长期角度看，双层窗的光学性能会因灰尘附着而降低。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><o:p><FONT face="Times New Roman"> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><FONT face="Times New Roman">3.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">隔热性</SPAN></P>
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<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中空玻璃在隔热性能上优于双层窗，主要是由于中空玻璃两片玻璃之间是密封的，中间的气体是呆性的不流动的</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">干燥空气或惰性气体，它的热阻要比双层窗之间的流动空气热阻要大得多。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><o:p><FONT face="Times New Roman"> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><FONT face="Times New Roman">4.</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">防结露</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN lang=EN-US><o:p><FONT face="Times New Roman"> </FONT></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 21pt 0pt 0cm; TEXT-INDENT: 21pt; mso-para-margin-right: 2.0gd; mso-char-indent-count: 2.0"><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">防结露是中空玻璃独有的优越性能，与室内空气相接触的内层玻璃，由于空气隔离层的影响，即使外层玻璃很冷，也不易变冷，因此就可消除和减少内层玻璃上的结露。另外，双层窗常见的外层玻璃内侧结露现象对于中空玻璃来说是不允许的，这种情况一旦在中空玻璃安装结构中发生，就意味着玻璃的失效，应立即更换。一般来说，中空玻璃的露点温度在—</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">40</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">度，至少也比普通窗低</SPAN><SPAN lang=EN-US><FONT face="Times New Roman">15</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">度左右。</SPAN></P>
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