供热工程课程设计crtm.docx

4 .管路的的水力计计算4.1 绘制制管路的的系统图图1.绘制制管路的的系统图图（1-3）层层。并标标上管段段，管长长，以及及热负荷荷大小。2.确定定最不利利环路，本本系统采采用异层层式系统统，取最最远的立立管为最最不利环环路。图图见附录录。4.2 计算最最不利环环路的管管径本设计采采用 重重力循环环系统.(1) 选择最不不利环路路，并标标管径；(2) 根据推荐荐比摩阻阻确定环环路管径径，流速速，以及及平均比比摩阻的的大小。(3) 计算各管管段的压压力损失失py；(4) 确定局部部阻力损损失pj；(5) 求各管段段的压力力损失p=py+pj；(6) 求环路的的总压力力损失p；(7) 平衡各管管段的阻阻力；(8) 将计算结结果记入入下列的的表中。水力计算算表管段号QWGKg/hhLmdmmVm/sRPa/mmpy=R Lpdpjp123456789101112立管一一层散热热器（最最不利环环路 ） 作用压力p =764.41pa116988582200.04452.2114.422250.99924.77529.11729638833210320.0884.94449.44043.89915.55664.997319266466318400.1448.811158.585.59.64453.002211.643852281325527700.1002.52268.00464.92229.55297.55651926646635400.1448.81144.0053.59.64433.77477.77969638833219320.08894.94493.88643.89915.556109.427600002063.3250.18.24427.11944.92219.66846.8878325221123.3250.05522.7559.08841.3335.32215.112L=887.66m（py+pj）=6552.449paa系统作用用压力富富裕率XX=(7764.41-6522.499)/7764.41=14.64%>100%入口处的的剩余循循环作用用压力，用用阀门截截流。立管二二层散热热器作用用压力p =12778.888paa9638662203.3150.322144.52476.92550.338251.90728.821014355492150.0778.92217.884312.14474.77392.557（ppy+pj）=8821.39ppa不平衡率率X=(5466.811-8221.339)/5466.811=-335%>>-155%(管管径最小小应调节节立管阀阀门) 立管三三层散热热器 作作用压力力p =17993.222paa11363881253.3150.18849.557163.58515.99479.770243.281219144662150.099615.3330.66314.533140.56171.16（ppy+pj）(99-122)=111433.266pa不平衡率率X=(11119.997-111433.266)/5546.81=-2.07%<155%立管一一层散热热器环路路 资用用压力p =2655.544pa13962993310.5320.099409222.46633.99911.99614.4421410422362150.05553.2666.522271.49940.11946.77115322881113.3200.1888.81129.007415.99463.77691.88316612772113.3250.1118.62228.44545.95523.88152.22617962663313.3320.0994.92216.22433.99911.99628.22不平衡率率X=(2655.544-2334.442)/2655.544=-111.77%<-115%立管二二层散热热器资用用压力 作用压压力p =12778.888paa18641662213.3150.333145478.5553.558267.87466619909312150.0442.7335.466310.7992.3667.822（ppy+pj）=7754.2paa不平衡率率X=(6544.011-7554.22)/6654.1=-14%<155% 立管三三层散热热器作用用压力p =17993.222paa20349991203.3150.17745.993151.57514.22271.009222.662112066412150.0665015510.33311.77754.9965.22（ppy+pj）=2887.88pa不平衡率率X=(12220.661-2287.8)/12220.661=776%>-115%(管径最最小应调调节立管管阀门) 注：由于于系统左左右两区区对称，故故两区水水力计算算数据相相同，不不再列出出，且系系统图也也不再标标注。局部阻力力系数统统计表管段号局部阻力力个数1散热器乙字弯截止阀分流三通通合流四通通22111252弯头直流四通通闸阀乙字弯111143直流三通通弯头闸阀1215.54弯头闸阀锅炉52165弯头闸阀旁流三通通3113.06弯头直流三通通2147直流四通通括弯1148直流四通通括弯1149直流四通通括弯11510弯头乙字弯分合流四四通截止阀散热器221113111直流四通通括弯11512弯头乙字弯分流四通通合流四通通截止阀散热器2211113113旁流三通通闸阀乙字弯111314乙字弯截止阀散热器分流三通通合流四通通211112715直流四通通括弯11416直流四通通括弯11417旁流三通通乙字弯闸阀111318直流四通通括弯11519弯头乙字弯分合流四四通截止阀散热器221113121弯头乙字弯分流四通通合流四通通221131