倉庫噴淋系統(tǒng)計(jì)算丙_圖文

1、一、計(jì)算基本條件計(jì)算原理參照自動(dòng)噴水滅火系統(tǒng)設(shè)計(jì)規(guī)范GB 50084-2001(2005年版 基本計(jì)算公式： 1、噴頭流量： 式中：q - 噴頭處節(jié)點(diǎn)流量，L/min P - 噴頭處水壓（噴頭工作壓力）MPaK - 噴頭流量系數(shù)2、流速V： 式中：Q - 管段流量L/sDj -管道的計(jì)算內(nèi)徑（m）3、水力坡降： 式中：i - 每米管道的水頭損失（mH20/m）V - 管道內(nèi)水的平均流速（m/s）dj - 管道的計(jì)算內(nèi)徑（m），取值應(yīng)按管道的內(nèi)徑減mm確定4、沿程水頭損失： 式中：L - 管段長(zhǎng)度m5、局部損失（采用當(dāng)量長(zhǎng)度法）： (當(dāng)量式中：L(當(dāng)量 - 管段當(dāng)量長(zhǎng)度，單位m(自動(dòng)噴水滅火系統(tǒng)

2、設(shè)計(jì)規(guī)范附錄C6、總損失： 7、終點(diǎn)壓力： 8、作用面積選擇。取3層最西北面區(qū)域?yàn)樽饔脜^(qū)域，區(qū)域入口處為3樓報(bào)警閥間。9、設(shè)計(jì)參數(shù)：作用區(qū)域按倉庫來考慮，層高6.5米，凈高5.1米，儲(chǔ)物高度3.54.5米。按倉庫危險(xiǎn)級(jí)，噴水強(qiáng)度12L/min*，作用面積200。持續(xù)噴水時(shí)間2h。二、計(jì)算書1、噴頭選擇作用區(qū)域內(nèi)1個(gè)噴頭保護(hù)面積為2.5m×3m =7.5 。1個(gè)噴頭的流量不小于90L/min。選擇K115直立式噴頭，工作壓力為0.1MPa。2、作用區(qū)域入口處水壓計(jì)算。管段名稱起點(diǎn)壓力mH2O管道流量L/s管長(zhǎng)m當(dāng)量長(zhǎng)度管徑mmK水力坡降mH2O/m流速m/s損失mH2O終點(diǎn)壓力mH2O

3、1-210.001.912.551.20321150.3422.011.2811.282-311.283.942.902.70401150.6903.133.8615.143-415.146.292.553.10501150.4382.962.4717.624-517.628.822.553.60501150.8624.155.3022.925-622.9211.712.903.70651150.3963.322.6225.536-725.5314.762.554.30651150.6304.194.3229.857-829.8514.762.554.60801150.2542.971.823

4、1.678-931.6714.760.775.40801150.2542.971.5733.249-1033.2414.763.150.001001150.0581.700.1833.4220-2110.081.922.551.20321150.3452.021.2911.3721-2211.373.952.902.70401150.6953.153.8915.2622-2315.266.312.553.10501150.4412.972.4917.7623-2417.768.862.553.60501150.8694.175.3423.1024-2523.1011.762.903.70651

5、150.4003.332.6425.7325-2625.7314.822.554.30651150.6354.204.3530.0826-2730.0814.822.554.60801150.2562.991.8331.9227-1031.9214.820.775.40801150.2562.991.5833.5010-1133.4229.583.006.101001150.2343.422.1335.5528-2910.631.972.551.20321150.3632.081.3611.9929-3011.994.062.902.70401150.7333.234.1016.0930-31

6、16.096.482.553.10501150.4653.052.6318.7231-3218.729.092.553.60501150.9164.285.6324.3532-3324.3512.072.903.70651150.4213.422.7827.1333-3427.1315.222.554.30651150.6694.324.5831.7134-3531.7115.222.554.60801150.2703.071.9333.6535-1133.6515.220.775.90801150.2703.071.8035.4511-1235.5544.803.009.201501150.

7、0682.370.8336.3836-3710.901.992.551.20321150.3732.101.4012.3037-3812.304.112.902.70401150.7523.274.2116.5038-3916.506.562.553.10501150.4773.092.7019.2039-4019.209.212.553.60501150.9394.345.7824.9840-4124.9812.232.903.70651150.4323.472.8527.8341-4227.8315.412.554.30651150.6874.374.7032.5342-4332.5315

8、.412.554.60801150.2773.101.9834.5143-1234.5115.410.775.90801150.2773.101.8536.3612-1336.3860.213.009.201501150.1233.191.5037.8813-1437.8860.212.500.001501150.1233.190.3138.1914-1538.1960.212.501.601501150.1233.190.5038.6915-1638.6960.2113.170.002001150.0341.960.4439.1316-1739.1360.2148.600.002001150

9、.0341.961.6340.7717-1840.7760.21121.320.002001150.0341.964.0844.8418-1944.8460.2128.680.002001150.0341.960.9645.81表算結(jié)果:所選作用面積:203.8平方米總流量:60.21 L/s平均噴水強(qiáng)度:17.73 L/min.平方米入口壓力:45.81 米水柱3、高差計(jì)算泵房水池吸水管標(biāo)高為 3.300米，最高處噴頭標(biāo)高為19.00，高差Z = 22.3米。4、主干管沿程損失及局部損失自吸水管路至三樓最不利區(qū)域入口處管路為DN200，管長(zhǎng)為125+33+23=181米。按流量60.21L/s，計(jì)算沿程損失和局部損失共計(jì)8米。5、泵站損失取5米。6、濕式報(bào)警閥及水流指示器水損取6米。7、噴淋泵揚(yáng)程H=45.81+22.3+8+5+6=8