采暖水力計(jì)算

1、采暖水力計(jì)算水流動(dòng)阻力確實(shí)定J、沿程阻力2水在管道內(nèi)的沿程阻力由下式確定：Hf =丸，絲d 2式中；I摩擦阻力系數(shù)，無(wú)因次量；I直管段長(zhǎng)度，4d 管段直徑，+；p 水的密度，- kg/m3 ；v水流速度，m/s o熱水管路比摩阻宜控制在一IH 干。當(dāng)量絕對(duì)粗糙度，摩擦阻力系數(shù)與流體的性質(zhì)、流態(tài)、流速、管徑大小、內(nèi)外表的粗糙度有關(guān)。過(guò)渡區(qū)的可按克列伯洛克公式計(jì) 算：1K 2.51 )二21g1(3.7d Re 式中K 管內(nèi)外表的當(dāng)量絕對(duì)粗糙度，閉式系統(tǒng)K = 0.2mm,開(kāi)式系統(tǒng)K = 05mm。當(dāng)K =時(shí)，不同流速及管徑的比摩阻值可查【一】表vdRe雷諾數(shù)，Re = vv運(yùn)動(dòng)粘度。、局部阻力v

2、2Hin N c2g式中， 局部阻力系數(shù);g 重力加速度;水流速度+ 一。、水管總阻力水流動(dòng)總阻力包括沿程阻力和局部阻力”d ，即:、水管道的計(jì)算步驟（一）畫(huà)出各層水管系統(tǒng)平面圖并進(jìn)行各管段編號(hào)，選定最不利環(huán)路。（_）根據(jù)水管路平面圖計(jì)算各管段的水流量。（一）由經(jīng)濟(jì)比摩阻和各管段水流量確定管徑，動(dòng)壓，對(duì)流速進(jìn)行校對(duì)。由以上確沿程阻力和局部阻力，累加算得總阻力，與其它分這只管路的阻力進(jìn)行比擬, 使其平衡率在一以?xún)?nèi)。不平衡計(jì)算：最不利支路總阻力為Pl= （APy+APj） +散熱器阻力=45. 39Kpa最有利支路總阻力為P2= （APy+APj） +散熱器阻力二40. 55Kpa不平衡率為：2

3、一01 * 100% = 45.39 - 40.55 *1。%=1。6%P245.39其值大于15虬 干管上要加平衡閥，見(jiàn)平面圖紙。供水立管水力計(jì)算管段編號(hào)支管冷 （熱）量干管冷 （熱）量流量實(shí)際管徑實(shí)際流速管段長(zhǎng)度雷諾數(shù)摩擦阻力 系數(shù)實(shí)際比摩 阻局部阻力 系數(shù)局部阻力沿程阻力管段的總限 力WWm3/hmmm/smReXPa/mqPaPaPa112533569299323.835131.00().33()15134281.840.0233621.13552.001659.36152.181811.5421485556765819.524106.000.36913.9136096.030.024

4、3842.76881.00185.95307.94493.8933865155280319.013106.000.4717.5132555.320.0244240.63892.00176.40292.60469.004115651415217.684106.000.47421.2123260.960.0245135.26932.00152.53253.94406.4751144551299617.644106.000.3609.7123039.670.0245135.14281.00151.98253.03405.01613482550155117.250106.000.3530.512016

5、2.840.0245433.55961.00289.92416.14706.06722699436672612.613106.000.5994087853.860.0250218.28994.5077.49118.88196.37857171397324.80668.000.6050.552242.170.0284127.81681.0066.5813.9180.49977541340154.60968.000.6146.550112.730.0285025.67641.00275.681027.061302.7410227741262614.34368.000.63912.447131.52

6、0.0286322.81592.0054.1911.4165.6011202861034873.55968.000.4327.238613.780.0291315.58181.0036.37151.14187.511220286832012.86253.000.4477.239943.630.0305636.94371.00128.14783.21911.351319249629152.16453.000.4617.230206.680.0312821.62541.0073.28162.19235.471419249436661.50241.000.4747.227048.020.033343

7、9.92131.0049.09554.91604.001524417244170.84035.750.4917.217389.870.0357926.720614.0053.38400.81454.198329.69回水立管水力計(jì)算管段編號(hào)支管冷 （熱）量干管冷 （熱）量流量實(shí)際管徑實(shí)際流速管段長(zhǎng)度雷諾數(shù)摩擦阻力 系數(shù)實(shí)際比摩 阻局部阻力 系數(shù)局部阻力沿程阻力管段的總阻 力WWm3/hmmm/smReXPa/m(PaPaPa124417244170.84035.750.2337.217389.870.0357926.720614.00373.67192.39566.06219249436661

8、.50241.000.3167.227048.020.0333439.92131.0049.09287.43336.52319249629152.16453.000.2737.230206.680.0312821.62541.0036.64155.70192.34420286832012.86253.000.3617.239943.630.0305636.94371.0064.07265.99330.065202861034873.55968.000.2727.238613.780.0305616.34671.0036.37117.70154.076227741262614.34368.000

9、.33212.447131.520.0286322.81592.00108.38282.92391.30777541340154.60968.000.3536.550112.730.0285025.67641.0061.26166.90228.16857171397324.80668.000.3680.552242.170.0284127.81681.0066.5813.9180.49922699436672612.613106.000.3974087853.860.0250218.28994.50348.69731.601080.291013482550155117.250106.000.5

10、430.5120162.840.0245433.55961.00144.9616.78161.74111144551299617.644106.000.5569.7123039.670.0245135.14281.00151.98340.89492.8712115651415217.684106.000.55721.2123260.960.0245135.26932.00305.06747.711052.77133865155280319.013106.000.5997.5132555.320.0244240.63892.00352.80304.79657.59141485556765819.

11、524106.000.61513.9136096.030.0243842.76881.00185.95594.49780.441512533569299323.835.000.49115134281.840.0233621.13552.00237.05317.03554.087058.78環(huán)路二立管水力回水立管水力計(jì)算管段編號(hào)支管冷 （熱）量干管冷 （熱）量流量實(shí)際管徑實(shí)際流速管段長(zhǎng)度雷諾數(shù)摩擦阻力 系數(shù)實(shí)際比摩 阻局部阻力 系數(shù)局部阻力沿程阻力管段的總阻 力WWm3/hmmm/smReXPa/mCPaPaPa1588858880.20321.250.1596.57053.76().04438

12、25.958014.00174.01168.73342.7427268131560.45227.000.219312344.470.0394034.40882.0047.16103.23J 50.3934351175070.60235.750.1676.612463.990.0372014.26752.0027.4294.17121.5944351218580.75235.750.2083.515524.010.0362321.55602.0042.5475.45117.9959556314141.08035.750.299822315.760.0349442.95742.0087.91343

13、.66431.5768792402061.38341.000.291124908.140.0335834.09822.0083.2734.10117.3778792489981.68541.000.3556.530386.220.0330349.91492.00123.92324.45448.3788792577901.98853.000.2505.327661.800.0315518.29162.0061.4696.95158.4194585623752.14553.000.2707.529874.740.0313221.17982.0071.68158.85230.531044562820

14、2.16153.000.2724.0530096.030.0312921.47422.0072.7586.97159.7211396941025143.52668.000.2704.0538329.850.0291515.36412.0071.6862.22133.90128221033363.55468.000.272138613.780.0291315.58182.0072.7515.5888.3313220001253364.31168.00().33()4.546847.600.0286522.55762.00107.08101.51208.591456765869299423.835

15、131.000.4915.5134281.840.0243822.05848.00948.20121.321069.523779.02供水立管水力計(jì)算管段編號(hào)支管冷 （熱虐干管冷 （熱虐流量實(shí)際管徑實(shí)際流速管段長(zhǎng)度雷諾數(shù)摩擦阻力 系數(shù)實(shí)際比摩 阻局部阻力 系數(shù)局部阻力沿程阻力管段的總阻 力WWm3/hmmm/smReXPa/mPaPaPa156765869299423.835131.000.4915.5134281.840.0233621.13558.00948.20116.251064.452220001253364.31168.000.3304.546847.600.0286522.557

16、62.00107.08101.51208.5938221033363.55468.000.272138613.780.0291315.58182.0072.7515.5888.334396941025143.52668.000.2704.0538329.850.0291515.36412.0071.6862.22133.905445628202.16153.000.2724.0530096.030.0312921.47422.0072.7586.97159.7264585623752.14553.000.2707.529874.740.0313221.17982.0071.68158.8523

17、0.5378792577901.98853.000.2505.327661.800.0315518.29162.0061.4696.95158.418879248998i.68541.000.3556.530386.220.0330349.91492.00123.92324.45448.3798792402061.38341.000.291124908.140.0335834.09822.0083.2734.10117.37109556314141.08035.750.299822315.760.0349442.95742.0087.91343.66431.57114351218580.75235.750.2083.515524.010.0362321.