【《某综合楼自动喷水灭火系统设计计算过程案例》1900字】

某综合楼自动喷水灭火系统设计计算过程案例目录TOC\o"1-3"\h\u733某综合楼自动喷水灭火系统设计计算过程案例 1118421.1系统的设计流量计算 1276721.2管道水力计算 1274441.3减压措施 81.1系统的设计流量计算喷头流量按下式计算：公式（3-11）式中：工作压力P；流量系数K。1.2管道水力计算（1）沿程水头损失公式（3-12）（2）局损采用当量长度法。（3）水泵扬程公式（3-13）（4）压力最难满足的点处作用面积选取和水力计算1）中危险级Ⅰ级区域压力最难满足的点处位于十二层，截取面积为178.51m2＞160m2。图3-16压力最难满足的点计算图（十二层）表3-13自动喷水灭火计算表（十二层）管段编号总水头损失

(mH2O)q

(L/s)当量长度(m)L

(m)Kiv(m/s)DN

(mm)终点压力(mH2O)1-20.531.110.601.93802.071.90257.532-30.151.110.200.52802.071.90257.693-40.592.281.800.85802.202.31328.284-50.732.280.902.35802.202.31329.0113-50.291.240.800.30802.542.12259.045-61.503.522.100.90804.923.573210.5114-61.071.290.902.95802.722.202510.476-71.694.812.701.30804.143.594012.2015-70.441.441.000.30803.342.462512.207-81.366.253.103.40802.052.865013.5616-171.141.430.802.60803.282.442512.6718-81.131.481.002.15803.532.532513.6019-170.391.470.800.30803.472.512512.64续表3-13管段编号总水头损失

(mH2O)q

(L/s)当量长度(m)L

(m)Kiv

(m/s)DN

(mm)终点压力(mH2O)17-80.892.902.250.30803.432.943213.568-92.2910.633.850.25805.474.875015.8520-210.861.210.802.70802.412.06259.1021-220.612.471.800.55802.562.51329.7225-220.781.260.802.15802.602.15259.7522-232.683.732.252.55805.483.793212.4026-271.061.350.802.70802.982.312511.4527-230.912.782.250.55803.172.823212.3628-231.041.421.002.15803.242.422512.4223-241.997.923.602.55803.183.635014.3929-301.221.460.802.70803.432.492513.3130-241.102.992.400.55803.653.043214.4131-241.201.531.002.15803.732.612514.4324-91.4512.444.302.45802.103.426515.849-102.4723.074.603.90802.854.498018.3132-330.261.310.600.32802.792.23259.9333-340.911.310.802.40802.792.232510.8437-340.351.360.800.32803.012.332510.8534-351.342.671.802.65802.952.713212.1735-363.614.132.103.25806.624.203215.7938-360.501.640.900.25804.262.812515.8136-102.525.783.001.25805.814.314018.3010-114.4428.844.605.50804.315.618022.7539-401.381.850.801.75805.303.162520.7441-401.381.850.801.75805.303.162520.7440-112.013.702.401.25805.393.763222.7511-124.0232.544.602.73805.386.338026.77位于十二层选取的面积中，压力最难满足的点处所需压力为0.2677MPa，流量为32.54L/s。危险级为中危险级Ⅱ级，截取面积为161.23m2＞160m2。图3-17压力最难满足的点计算图（负一楼）表3-14自动喷水灭火计算表（负一楼）管段编号总水头损失

(mH2O)q

(L/s)当量长度(m)L

(m)Kiv

(m/s)DN

(mm)终点压力(mH2O)1-20.671.110.802.40802.071.90257.672-30.602.271.800.87802.202.31328.2711-30.541.170.801.53802.282.00258.313-41.593.452.251.05804.733.50329.8712-130.841.200.802.65802.392.06259.0513-40.822.472.250.92802.552.51329.8714-40.741.271.001.73802.642.17259.874-51.807.183.603.05802.653.295011.6615-160.981.310.802.65802.792.232510.6616-51.012.682.400.92802.972.723211.6717-50.861.381.001.73803.102.362511.69续表3-14管段编号总水头损失

(mH2O)q

(L/s)当量长度(m)L

(m)iKv

(m/s)DN

(mm)终点压力(mH2O)5-60.8711.243.701.201.74803.096512.5318-190.981.360.802.403.01802.332511.4819-61.062.782.400.873.19802.833212.5520-60.861.441.001.533.33802.452512.566-72.2015.464.302.553.14804.246514.7321-221.191.470.802.553.47802.512513.4422-71.303.012.401.073.68803.063214.7423-70.981.561.001.483.87802.662514.767-81.8120.036.201.902.19803.908016.5424-250.681.110.802.402.07801.90257.7025-260.732.281.801.472.20802.31328.4331-260.411.190.800.932.34802.03258.4026-271.613.462.251.054.78803.523210.0432-330.831.210.802.552.42802.07259.1433-270.872.482.251.072.58802.523210.0134-270.681.281.001.482.70802.192510.0327-281.797.233.602.952.69803.315011.8335-360.971.320.802.552.83802.252510.8136-281.072.702.401.073.01802.743211.8837-280.801.401.001.483.15802.382511.8428-290.9011.323.701.301.77803.116512.7338-390.981.360.802.403.01802.332511.4839-291.262.782.401.473.19802.833212.7440-290.671.461.000.933.41802.492512.7029-302.1315.574.302.253.18804.276514.8641-421.201.480.802.553.50802.522513.5542-301.323.022.401.073.72803.073214.8743-300.991.571.001.483.90802.672514.8830-81.6820.156.201.202.22803.928016.548-90.3340.189.201.960.29802.0215016.88续表3-14管段编号总水头损失

(mH2O)q

(L/s)当量长度(m)L

(m)Kiv

(m/s)DN

(mm)终点压力(mH2O)9-100.2440.184.303.84800.292.0215017.12位于负一楼选取的面积中，压力最难满足的点所需压力为0.1711MPa，流量40.18L/s。（5）水力计算校核1）本建筑十二层工作压力最难满足的喷头压力P=0.07MPa，喷头流量：计算平均喷水强度为：q=32.54×60/178.51=10.94L/(min·m2)>6L(min·m2)2）本建筑负一楼工作压力最难满足的喷头压力P=0.07MPa，喷头流量：计算平均喷水强度为：q=40.18×60/161.23=14.95L/(min·m2)>8L(min·m2)（6）自动喷水灭火系统压力计算1）中危Ⅰ级压力最难满足的点处压力计算①距离泵的长度为77.62m，取DN80，则：i=6.05(qi=6.05(qg1.85×Ch-1.85×dj-4.87)×107=0.3351(kPa/m)h=iL=0.3351×h=iL=0.3351×77.62=0.0260MPa34.55③局损按沿程水头损失的10%计，水流指示器和湿式报警阀水损分别取0.02MPa和0.04MPa，总损失为：Σh=1.1×0.0260+0.04+0.02=0.0886MPaΣh=1.1×0.0260+0.04+0.02=0.0886MPa34.55⑤系统到入口管水平中心线的高差Z=0.4750MPa。⑥则所需水泵扬程为：H=Σh+P0+Z=0.0886+0.07+0.4750=0.6336MPa34.55H=Σh+P0+Z=0.0886+0.07+0.4750=0.6336MPa34.55①距离泵的长度为53.73m，取DN150，则：i=6.05(qi=6.05(qg1.85×Ch-1.85×dj-4.87)×107=0.2019(kPa/m)h=iL=0.2019×h=iL=0.2019×53.73=0.0108MPa34.55Σh=1.1Σh=1.1×0.0108+0.04+0.02=0.0719MPa34.55④喷头工作压力P0=0.07MPa⑤系统到入口管水平中心线的高差Z=0.0399MPa。H=Σh+PH=Σh+P0+Z=0.0719+0.07+0.0399=0.1818MPa34.55（7）自动喷水灭火系统加压泵选用负一楼的消防泵房内所设置的加压泵共有两台，包含一台用作备用的加压泵，单台:XBD8/40-W150,180m3/h，H=99m，N=75KW,n=1480r/min，(运行工况Q=0m3/h，H=127m；Q=126m3/h，H=110m；Q=270m3/h，H=66m)，当出现系统压力大于0.96MPa的情况时，将自动开启泄压阀，消防水池将接收泄压后产生