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var intHours, intMinutes, intSeconds; var today; today = new Date(); intHours = today.getHours(); intMinutes = today.getMinutes(); intSeconds = today.getSeconds(); if (intHours == 0) { hours = "24:"; ap = "Midnight"; } else if (intHours < 24) { hours = intHours+":"; ap = ""; } else if (intHours == 24) { hours = "12:"; ap = "Noon"; } else { hours = intHours + ":"; ap = ""; } if (intMinutes < 10) { minutes = "0"+intMinutes+":"; } else { minutes = intMinutes+":"; } if (intSeconds < 10) { seconds = "0"+intSeconds+" "; } else { seconds = intSeconds+" "; } timeString = hours+minutes+seconds; Clock.innerHTML = timeString; window.setTimeout("tick();", 1000); } window.onload = tick; </script> </td> </tr> </table></td> </tr> </table></td> </tr> </table> <table width="1003" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td height="5"></td> </tr> </table> </td></tr> </table> <table width="1003" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td width="773" valign="top"> <table width="768" border="0" align="left" cellpadding="0" cellspacing="0"> <tr> <td><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="27" valign="top" background="images/h.jpg" class="white12"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="4"></td> </tr> <tr> <td valign="top"> <span class="white12">海洋能小常识</span></td> </tr> </table></td> </tr> </table></td> </tr> <tr> <td valign="top"><table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="D10000"> <tr> <td height="205" valign="top" bgcolor="#FFFFFF"> <table width="100%" height="637" border="0" cellpadding="0" cellspacing="3"> <tr> <td valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="8"></td> </tr> </table> <table width="97%" border="0" align="center" cellpadding="0" cellspacing="10" bgcolor="#FAFAFA"> <tr> <td><table width="100%" border="0" align="center" cellpadding="0" cellspacing="0" > <tr align="center" bgcolor="#E6FFE6" class="a1"> <td height="25" bgcolor="#EEEEEE" class="r13"><strong> 海流能源 </strong></td> </tr> </table> <table width="100%" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td> </td> </tr> <tr> <td background="images/dian.jpg" height="1"></td> </tr> <tr> <td height="30" align="right" class="12b"><span class="r">发布时间：2008-3-24 11:32:20 </span> </td> </tr> </table> <table width="98%" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td><span class="12b"> </span><span class="12b1"> 海流是海水平方向的流动，其流速和流向都比较稳定。海流有由风引起的风海流，由水温、盐度变化引起的密度流，由潮汐引起的潮流，以及为流失海水补缺的补缺流。从层次上分，海流有表层流，还有表层以下的上层流、中层流、深层流和底层流。表层流，主要是风总是朝着一个方向吹刮海面，迫使海水不断向前移动引起的。在大洋中它往往是有规律的循环流动，所以称大洋环流。例如，北太平洋大洋环流，长达14000km，宽数百公里。它流经我国近海的一段，称台湾暖流。由于水色蓝黑。也叫“黑潮”。它不但从赤道带来很多热量，而且有巨大的动能，它的输水量相当于全世界河流输水量总和的20倍。如果用海流发电，不但能量大于河流，而且没有河流常见的枯水期。 <BR><BR> 目前，国外试验潮流发电，其原理就是用锚、索和浮筒把水轮机和发电机固定在海面上，由海流推动螺旋桨旋转发电。但由于海上安装设备的困难，当前还只能用来为灯塔、灯船供电。 <BR><BR> 此外，河海之间的盐差能、海水压差能，也有巨大的能量。特别是海洋中的生物能源更为新颖别致，如果把海藻发酵，可以制取甲烷、氢气和石油。把1平方公里海域内生产的海藻拿出一半来转化为动力，就相当于四个葛洲坝水电站。<br> </span><span class="12b1"> </span> </td> </tr> </table></td> </tr> </table> <table width="97%" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td height="10"></td> </tr> <tr> <td height="25" bgcolor="#F6F6F6"> <div align="right"><a href=javascript:window.opener=null;window.close() class="a3">[关闭本页] </a></div></td> </tr> <tr> <td height="10"></td> </tr> </table></td> </tr> </table></td> </tr> </table></td> </tr> </table> </td> <td width="230" valign="top"><link href="css.css" rel="stylesheet" type="text/css"> <table width="227" border="0" cellpadding="0" cellspacing="0"> <tr> <td width="227" height="25"><img src="images/wzjs.jpg" border="0" usemap="#Mapsp"></td> </tr> <tr> <td valign="top"> <table width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="D10000"> <tr> <td height="216" valign="top" bgcolor="#FFFFFF"> <table width="100%" border="0" cellpadding="0" cellspacing="10"> <tr> <td valign="top"> <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="205" height="195"> <param name="movie" value="vcastr22.swf";> <param name="quality" value="high"> <param name="allowFullScreen" value="true" /> <param name="wmode" value="transparent"> <param name="FlashVars" value="vcastr_file=http://www.newenergycn.com/web/news/../UploadFile/201082511435542611.flv" /> <embed src="vcastr22.swf"; 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