特气设计计算公式

3FGRIDTREATMENT氣罩改善報告一.求原有風量風量CMM截面積M2風速M/S第1點13.50.037.5原系統現有風量36CMM第2點180.0310第3點4.50.017.5總風量36二.修改氣罩型式後之風速求得風量CMM截面積M2風速M/S第1點13.50.57750.4風速未達法規0.8M/S以上第2點181.0140.3第3點4.50.03752三.符合法規之風量須求風量CMM截面積M2風速M/S第1點27.720.57750.8為符合法規風量須達至第2點48.6721.0140.8少80CMM第3點1.80.03750.8總風量78.192四.GRIDTREATMENT配置圖五.原有(廠商自行製作)氣罩圖此處氣流壓降太大距離設備太遠六.擬修改氣罩示意圖氣流較平順,提昇效率加長靠近設備說明:1.原氣罩往下延伸接近設備2.氣罩上方改流線型設計提昇排氣效率3.本系統風量須達80CMM提報人:VINCENT第2點第1點第3點風管計算求管徑(請輸入風量與風速)風量Q(CMM)風速V(M/sec)截面積(M2)管徑(mm)圓周率=圓周長÷直徑=3.14「是用四捨五入取到小數笫二位的近似值」 40.0010.000.07291.35圓周=直徑×圓周率=半徑×2×圓周率 半圓周=直徑×圓周率÷2=半徑×圓周率 求風量(請輸入管徑與風速)直徑=圓周÷圓周率 風量Q(CMM)風速V(M/sec)截面積(M2)管徑(mm)半徑=圓周÷圓周率÷2 113.1015.000.13400.00圓面積=半徑×半徑×3.14=直徑×直徑×0.785 0.2求風速(請輸入管徑與風量)0.031415927風量Q(CMM)風速V(M/sec)截面積(M2)管徑(mm)16.678.840.031200.00求管截面積(請輸入風量與風速)風量Q(CMM)風速V(M/sec)方型管截面積(M2)2.500.800.05求風量(請輸入管截面積與風速)風量Q(CMM)風速V(M/sec)方型管截面積(M2)17.280.800.36求風速(請輸入管截面積與風量)風量Q(CMM)風速V(M/sec)方型管截面積(M2)2.551.130.04直徑(M)截面積圓周率=圓周長÷直徑=3.14「是用四捨五入取到小數笫二位的近似值」 圓周=直徑×圓周率=半徑×2×圓周率 半圓周=直徑×圓周率÷2=半徑×圓周率 管內徑(mm)氣體流速(M/sec)壓力(kg/cm2)管內溫度C7398825空氣壓力Q(NM3/HR)Q(NM3/min)117911.50561965.19176空氣壓力管徑(mm)流速(M/sec)流量(LPM)流量CMM)26426565.366.5654管徑(mm)流速(M/sec)流量(LPM)流量CMM)流速(M/sec)77.82.106000.60002.10管徑(mm)流速(M/sec)流量(LPM)流量CMM)79.812.006000.60001線=10CM18番=1.2mm20番=1.0mmπD2/4=圓截面積πγ2=圓截面積輸入管徑,一般管路流速約1.5~2M/sec,可求得可容許最大流量流量流速管徑流速(M/sec)2.10Q=A*VA=截面積V=流速Q=流量πD2/4=圓截面積πγ2=圓截面積壓力(Pressure)m-Hgm-H2Oft-H2Oatmpsi(lb/in2)Kg/cm2Kpa(KN/m2)barmm-H2O113.61.1330.03340.4910.03453.3870.0339345.30.0735510.0830.002460.0360.002540.2490.002525.40.88261210.02950.4330.03052.9880.0299304.829.92406.833.9114.71.033101.31.01310332.32.03627.692.3070.06810.076.8950.0689702.87828.96393.732.810.967814.22198.050.981100000.29534.0160.33470.009870.1450.0110.01101.9729.498401.1833.420.985814.491.0299.91110185.840.002890.03940.00339.68*10-50.00149.9*10-50.00989.81*10-511Kgf=9.8N1N=1Kg-m/s21psi=1lb/in21pa=1N/m21Mpa=10.2Kg/cm21psi=0.07Kg/cm21pa=14.5*10-5psi1bar=14.5psi1Kg/cm2=14.22psi單位換算1Kgf/M2=9.8pa1m-H2O=9.8Kpa1m-Hg=133Kpa(水柱高)(水銀柱高)流量(VolumeofFlow)l/secl/minft3/sec(CFS)ft3/min(CFM)ft3/hr(CFH)m3/min(CMM)m3/hr(CMH)gal/min1600.035322.119127.140.063.615.850.016710.0005880.035322.1190.0010.060.26428.321699.216036001.6992101.934448.80.47228.31530.016671600.028321.69897.480.007830.471880.0002780.0166710.0004720.028320.12416.6710000.5886135.31652119160264.150.27816.670.009810.5886135.31650.0166714.40.0633.78540.002230.13378.0210.003780.227141CFM(CubicFeetPerMinute)ft3/minCMM(CubicMeterPerMinute)m3/min(立方英呎/每分鐘)(立方米/每分鐘)CFH(CubicFeetPerHour)ft3/hrCMH(CubicMeterPerHour)m3/hr(立方英呎/每小時)(立方米/每小時)NLPM(NormalLiterPerMinute)l/minSLPM(StandardLiterPerMinute)l/min(公升/每分鐘)(0°C/1atm)(標準公升/每分鐘)(70°F/1atm)流速(VelocityofFlow)m/secm/hrKm/hrft/secft/minmile/hr136003.63.281196.850.00027810.0010.0009110.054680.0006210.2778100010.911454.6820.62140.30481097.251.09731600.681820.0050818.2870.018290.0166710.011360.4471609.311.60931.4667881m/s(米/每秒)ft/s(英呎/每秒)溫度(Temperature)°C-10051015202530°F1432415059687786°K263.15273.15278.15283.15288.15293.15298.15303.15°F=1.8t(°C)+32°K=t(°C)+273.15常用單位換算表管子承受壓力計算依機械設計便覽高壓氣體取締法特定設備檢查規則第14條之承受壓力於內面之管之最小厚度t=PD0/(200σaη+0.8P)t=管之最小厚度(mm)P=設計壓力(kg/cm2)D0=管之外徑(mm)σa=設計溫度之材料容許拉硬力(kg/cm2),SUS316LTP=49以上η=縱向接合之熔接效率(周圍接合之場合為1)因此配管用不鏽鋼可容許之設計壓力如下:壓力值(P)kg/cm21/46.3511=P*6.35/(200*49*1+0.8P)P=1765.76kg/cm23/89.5211=P*9.52/(200*49*1+0.8P)P=1123.85kg/cm211=P*12.7/(200*49*1+0.8P)P=823.52kg/cm21.241.24=P*12.7/(200*49*1+0.8P)P=1037.92kg/cm21.241.24=P*19.05/(200*49*1+0.8P)P=632.92kg/cm21.651.65=P*19.05/(200*49*1+0.8P)P=912.01kg/cm215A21.71.651.65=P*21.7/(200*49*1+0.8P)P=793.42kg/cm215A21.71.651.65=P*21.7/(200*49*1+0.8P)P=793.42kg/cm220A27.21.651.65=P*27.2/(200*49*1+0.8P)P=624.81kg/cm225A341.651.65=P*34/(200*49*1+0.8P)P=494.80kg/cm232A42.71.651.65=P*42.7/(200*49*1+0.8P)P=390.77kg/cm240A48.61.651.65=P*48.6/(200*49*1+0.8P)P=342.00kg/cm250A60.51.651.65=P*60.5/(200*49*1+0.8P)P=273.23kg/cm265A76.32.12.1=P*76.3/(200*49*1+0.8P)P=277.36kg/cm280A89.12.12.1=P*89.1/(200*49*1+0.8P)P=236.55kg/cm2100A114.32.12.1=P*114.3/(200*49*1+0.8P)P=183.42kg/cm2125A139.82.82.8=P*139.8/(200*49*1+0.8P)P=199.48kg/cm2150A165.22.82.8=P*165.2/(200*49*1+0.8P)P=168.38kg/cm2200A216.32.82.8=P*216.3/(200*49*1+0.8P)P=127.00kg/cm2250A267.43.43.4=P*267.4/(200*49*1+0.8P)P=126.21kg/cm2300A318.544=P*318.5/(200*49*1+0.8P)P=124.64kg/cm2公式1/212.73/419.05尺寸管徑(D0)mm管厚(t)mm依機械設計便覽高壓氣體取締法特定設備檢查規則第14條之承受壓力於內面之管之最小厚度psi25109.115981.1511710.4514759.269000.0712968.7811282.4311282.438884.87036.065556.754863.243885.333944.063363.742608.232836.612394.361805.941794.711772.38管徑對照表公稱直徑外径sch5Ssch10S1sch5S管厚内徑管厚内徑2sch10SOD(mm)t(mm)ID(mm)t(mm)ID(mm)1125.41.2422.921.6522.1021/212.71.0010.701.2410.2231/46.351.004.351.004.3541/83.180.701.780.701.785100A114.32.10110.103.00108.30610A17.31.2014.901.6514.007125A139.82.80134.203.40133.008150A165.22.80159.603.40158.40915A21.71.6518.402.1017.5010200A216.32.80210.704.00208.301120A27.21.6523.902.1023.0012250A267.43.40260.604.00259.401325A341.6530.702.8028.40143/419.051.2416.571.6515.75153/89.531.007