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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p style="margin: 0px auto; padding: 0px;">矿井井口供暖热风炉配�?/p><p style="margin: 0px auto; padding: 0px;">　　一、计算公弎�/p><p style="margin: 0px auto; padding: 0px;">　　Q炈�cm△t� 因m=v·γ ，所以Q炈�c vγ(t2-t1)</p><p style="margin: 0px auto; padding: 0px;">　　其中� 1、C为空气的比热，取0.24kcal/kg、�/p><p style="margin: 0px auto; padding: 0px;">　　2、V为矿井的总进风量，可根据矿井的设计数据，单位m3/h�?如单位为m3/min要乘�?0变为m3/h).</p><p style="margin: 0px auto; padding: 0px;">　　3、γ为环境温度下的大气密度(可查空气密度�?，单位kg/m3、�/p><p style="margin: 0px auto; padding: 0px;">　　4、t2 为理想温度即热平衡后的较高温度，一般取零上2-3℃、�/p><p style="margin: 0px auto; padding: 0px;">　　5、t1 为井上大气温度，黑龙江一般取-30℃，吉林�?28℃，辽宁�?25℃、�/p><p style="margin: 0px auto; padding: 0px;">　　二、注意的几个问题</p><p style="margin: 0px auto; padding: 0px;">　　1、选用的矿用热风炉尽量采用大风量较低温度供热，出口风温只要高于60℃即可、�/p><p style="margin: 0px auto; padding: 0px;">　　2、送风机的全压越大越好、�/p><p style="margin: 0px auto; padding: 0px;">　　3、矿用热风炉的功率一般要大于公式计算结果5�?0%为宜、�/p><p style="margin: 0px auto; padding: 0px;">　　三、经验配�?/p><p style="margin: 0px auto; padding: 0px;">　　实际上也可根据以下经验算法配置，首先算出井巷的横截面积，再乘�?0�?0米长度，(假定为取暖空�?，计算出所需热能。当然，在热量的输送过程中会有温度从高到低的梯度变化，但即使到40�?0米处其温度也不会降至3℃以下。因为地表以下垂直深�?0米处的温度肯定大�?�?℃，根本不需供暖、�/p><p style="margin: 0px auto; padding: 0px;">　　这种计算结果，所选的矿用热风炉就将缩小，对于投资和节能都有利、�/p><p style="margin: 0px auto; padding: 0px;">　　此法应在合理长度末端,设隔断活动风�?风门上留导风筒通过�?.此法配置的矿用热风炉比加热总进风量法要小好几倍、�/p><ul id="prev_next" style="list-style-type: none;" class=" list-paddingleft-2"><li><p>上一篇：<span id="k_lastpage">DRL系列矿井电热风炉</span></p></li></ul><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 暂无数据� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div style="padding:10px;">暂无相关方案、�/div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); 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