某酒店建筑消防系統(tǒng)設(shè)計(jì)計(jì)算過程案例目錄TOC\o"1-3"\h\u2897某酒店建筑消防系統(tǒng)設(shè)計(jì)計(jì)算過程案例 1120631.1室內(nèi)消火栓給水系統(tǒng)的水力計(jì)算 1315041.2噴淋系統(tǒng) 61.1室內(nèi)消火栓給水系統(tǒng)的水力計(jì)算1.1.1消火栓的布置YXC酒店建筑面積為37342m2，建筑高度為75.55m。地下一層主要是停車場(chǎng)和各類泵房，建筑面積3400m2；一層到五層主要功能為休閑洗浴健身，建筑面積都為3400m2；六至十八層主要是客房，由標(biāo)準(zhǔn)雙人間和標(biāo)準(zhǔn)大床房構(gòu)成，建筑面積為1408m。規(guī)范要求，室內(nèi)消火栓的布置應(yīng)滿足同一平面有2只消防水槍的2股充實(shí)水柱同時(shí)到達(dá)任何部位的要求。本酒店主要呈條狀，東西方向狹長南北較窄，故消火栓主要布置在酒店的走廊，電梯前室。圖1.1.1-1消火栓布置示意圖1.1.2消火栓壓力及流量的確定消火栓連接方式為平接，水龍帶長度20m，水龍帶材料為麻織，水龍帶直徑65mm，水槍噴嘴口徑19mm，消火栓出水量要求大于5L/s，取5L/s。根據(jù)規(guī)范要求，一類公共建筑，h>50m的，消火栓系統(tǒng)設(shè)計(jì)流量為40L/s，同時(shí)使用消防水槍數(shù)量為8支，每根立管最小流量為15L/s。該設(shè)計(jì)共計(jì)5支消防立管，每根立管最小流量為15L/s，單個(gè)消火栓最小流量5L/s，故計(jì)算時(shí)每根立管按照3個(gè)消火栓工作進(jìn)行計(jì)算。根據(jù)《消防給水及消火栓系統(tǒng)技術(shù)規(guī)范》7.4.12，高層建筑消火栓栓口動(dòng)壓不應(yīng)小于0.35MPa，在計(jì)算時(shí)設(shè)置消防栓口動(dòng)壓為0.35MPa，校核流量后水槍射流量符合大于5L/s的要求，消防栓口水壓為0.3521MPa。1.1.3消火栓立管管徑及揚(yáng)程的計(jì)算計(jì)算原理參照《全國民用建筑工程設(shè)計(jì)技術(shù)措施2009》，《建筑給水排水工程》（中國建筑工業(yè)出版社），《消防給水及消火栓系統(tǒng)技術(shù)規(guī)范》GB50974-2014基本計(jì)算公式1、最不利點(diǎn)消火栓流量：（3-7）式中：qxh--水槍噴嘴射出流量(L/s)（依據(jù)規(guī)范需要與水槍的額定流量進(jìn)行比較，取較大值）B--水槍水流特性系數(shù)Hq--水槍噴嘴造成一定長度的充實(shí)水柱所需水壓（mH2O）2、最不利點(diǎn)消火栓壓力：（3-8）式中：Hxh--消火栓栓口的最低水壓(0.010MPa)hd--消防水帶的水頭損失(0.01MPa)Hq--水槍噴嘴造成一定長度的充實(shí)水柱所需水壓(0.01MPa)Ad--水帶的比阻Ld--水帶的長度(m)qxh--水槍噴嘴射出流量(L/s)B-水槍水流特性系數(shù)Hsk--消火栓栓口水頭損失，宜取0.02Mpa3、管道速度壓力：（3-9）式中：Pv--管道速度壓力（MPa）q--管段設(shè)計(jì)流量（L/s）di--管道的內(nèi)徑（m）4、管道壓力：（3-10）式中：Pn--管道某一點(diǎn)處壓力（MPa）Pt--管道某一點(diǎn)處總壓力（MPa）5、次不利點(diǎn)消火栓壓力：（3-11）式中：h高差--兩消火栓的高差(m)hf+j--兩個(gè)消火栓之間的沿程、局部水頭損失(m)6、次不利點(diǎn)消火栓流量：（3-12）（依據(jù)規(guī)范需要與水槍的額定流量進(jìn)行比較，取較大值）7、流速V：（3-13）式中：qxh--管段流量（L/s）dj--管道的內(nèi)徑（m）8、水力坡降：（3-14）式中：i--單位長度管道沿程水頭損失(MPa/m) di--管道的內(nèi)徑(m) v--管道內(nèi)水的平均流速(m/s) ρ--水的密度(kg/m3) λ--沿程損失阻力系數(shù) ε--當(dāng)量粗糙度 Re--雷諾數(shù) μ--水的動(dòng)力黏滯系數(shù)(Pa/s) v--水的運(yùn)動(dòng)黏滯系數(shù)(m2/s) T--水的溫度，宜取10℃9、沿程水頭損失：（3-15）式中：Pf--管道沿程損失（MPa）L--管段長度（m）10、局部損失（采用當(dāng)量長度法）：（3-16）式中：Pp--管件和閥門等局部水頭損失（MPa）Lp--管段當(dāng)量長度，單位m(《消防給水及消火栓系統(tǒng)技術(shù)規(guī)范》GB50974-2014表10.1.6-1、表10.1.6-2)11、設(shè)計(jì)揚(yáng)程：（3-17）式中：P--消防水泵或消防給水系統(tǒng)所需要的設(shè)計(jì)揚(yáng)程或設(shè)計(jì)壓力(MPa)K--安全系數(shù)，可取1.20～1.40；宜根據(jù)管道的復(fù)雜程度和不可預(yù)見發(fā)生的管道變更所帶來的不確定性H--當(dāng)消防水泵從消防水池吸水時(shí)，H為最低有效水位至最不利水滅火設(shè)施的幾何高差；當(dāng)消防水泵從市政給水管網(wǎng)直接吸水時(shí)，H為火災(zāi)時(shí)市政給水管網(wǎng)在消防水泵入口處的設(shè)計(jì)壓力值的高程至最不利水滅火設(shè)施的幾何高差(m)P0--最不利點(diǎn)水滅火設(shè)施所需的設(shè)計(jì)壓力(MPa)計(jì)算參數(shù)：水龍帶材料：麻織水龍帶長度：20m水龍帶直徑：65mm水槍噴嘴口徑：19mm充實(shí)水柱長度：10m計(jì)算結(jié)果見表3-8管段名稱起點(diǎn)壓力mH2O管道流量L/s管長m當(dāng)量長度管徑mm管內(nèi)徑水力坡降mH2O/m流速m/s水頭損失mH2O高差損失mH2O終點(diǎn)壓力mH2O1-220.005.000.550.402527.34.2408.544.030.0024.032-324.035.000.926.10100106.30.0040.560.030.0024.063-424.065.001.203.10100106.30.0040.560.020.0024.074-524.075.004.403.70100106.30.0040.560.030.0024.105-624.105.008.466.10100106.30.0040.560.060.0024.166-724.165.000.603.10100106.30.0040.560.010.0024.17表3-8消防計(jì)算表起點(diǎn)栓口壓力：20.00mH2O沿程損失：4.17mH2O高差損失：0.00mH2O安全系數(shù)：1.2計(jì)算結(jié)果:設(shè)計(jì)揚(yáng)程:69.95mH2O1.1.4消防水泵選型根據(jù)H=82.30m，Q=42.74L/s。選擇上海熊貓集團(tuán)生產(chǎn)的FWG100-250（Ⅰ）臥式離心泵2臺(tái)，1用1備，流量為26.7-44.4-53.3L/s，83-80-72m，功率55.0kW，基座長960.0，寬810.0，H=670.0，h1=370.0，h2=670.0，L1=680.0，L2=460.0，螺孔深度為60.0。進(jìn)水管標(biāo)高370.0，出水管標(biāo)高670.0，進(jìn)出水管各2根。1.1.6消火栓緩壓減壓計(jì)算H0=Hb-（Hz+Hg+Hxh）其中H0為剩余水壓，Hb為水泵揚(yáng)程，Hz為消火栓與水泵高差，Hg為管路總損失，Hxh為栓口所需壓力。表3-9效果栓緩壓減壓計(jì)算表消火栓樓層層高剩余作用于消火栓壓力-1-4.593.1211.0587.5726.5582.07311.5577.07416.5572.07521.5567.07624.8563.77728.1560.47831.4557.17934.7553.871038.0550.571141.3547.271244.6543.971347.9540.671451.2537.371554.5534.071657.8530.771761.1524.471864.5524.17其中各層消火栓管路損失均按總損失計(jì)算，故11層剩余作用于消火栓壓力偏小，實(shí)際應(yīng)大于50MH2O。根據(jù)規(guī)范7.4.12.1規(guī)定消火栓栓口動(dòng)壓不應(yīng)大于0.5MPa，當(dāng)大于0.7MPa時(shí)必須設(shè)置減壓裝置。在本設(shè)計(jì)中-1至4層消火栓均需設(shè)置減壓緩壓裝置。1.1.7消防水箱計(jì)算根據(jù)規(guī)范要求，一類公共建筑高位消防水箱不應(yīng)小于18m3。根據(jù)要求，選擇水箱長4000，寬3000，高1500，容積為18m3，重量為1910kg的組合式不銹鋼板水箱.其中，水箱下墊置枕木，枕木數(shù)為2，水平放置，長4.1，寬0.2，高0.5m。最高水位為1.5，最低水位為1.0，設(shè)置進(jìn)水管2根，標(biāo)高2.5，泄水管1根，標(biāo)高0.0。1.1.8水箱校核消防水箱的高度應(yīng)滿足最高層消火栓的工作壓力。18層消火栓標(biāo)高為68.55m，最不利點(diǎn)消火栓工作壓力要求不小于0.07MPa。消防水箱最低點(diǎn)水位設(shè)置為1m，則最不利點(diǎn)效果栓靜水壓力為0.02417MPa，故該消防水箱供水時(shí)需設(shè)置增壓設(shè)備。1.2噴淋系統(tǒng)1.2.1噴淋規(guī)范規(guī)范規(guī)定：1.2.2噴頭的選擇與布置規(guī)范規(guī)定環(huán)境溫度不低于4℃且不高于70℃的場(chǎng)所，應(yīng)采用濕式系統(tǒng)。濕式系統(tǒng)的報(bào)警閥組控制的噴頭數(shù)不宜超過800只。該20層酒店建筑位于北方某省YXC市，建筑面積11448m2，建筑總高度75.55m；地下部分有一層為庫房、空調(diào)機(jī)房和水泵室，地面標(biāo)高-4.5m。地上部分20層，建筑高度75.55m，建筑面積41711.39m2。其中，1層設(shè)有商務(wù)中心、會(huì)議室、花店和餐廳等；2層為多功能廳、會(huì)議室、棋牌室和接待室等；3層設(shè)有洗浴桑拿等；4層為休閑浴足區(qū)；5層設(shè)有屋頂花園、健身房、咖啡廳和游泳池等，設(shè)置噴頭159只。6層以上均為客房包間。6-18層主要為客房標(biāo)準(zhǔn)間和大床房，建筑面積，每層設(shè)置噴頭154只。所以噴淋的地上分區(qū)為1-5層，6-11層，12-18層，豎向分三個(gè)區(qū)。1.2.3最不利作用面積內(nèi)噴頭的校核最不作用面積內(nèi)任意4只噴頭圍合的范圍內(nèi)的平均噴水強(qiáng)度的最小值，是由1、2、11、12點(diǎn)處的4只噴頭組合成的數(shù)值，4只噴頭的平均流量和為：1.33+1.47+1.31+1.42=5.53L/s=331.8L/min，4只噴頭的保護(hù)面積為8.64*4=34.56m2，4只噴頭的平均噴水強(qiáng)度為331.8/34.56=9.6L/（min·m2）＞6*0.85=5.1L/（min·m2），即滿足最不利點(diǎn)處4個(gè)噴頭的平均噴水強(qiáng)度大于規(guī)范規(guī)定數(shù)值的0.85倍的要求。1.2.4最不利作用面積的計(jì)算規(guī)范5.0.1規(guī)定中危等級(jí)系統(tǒng)最不利點(diǎn)噴頭的工作壓力不應(yīng)低于0.05MPa。噴頭采用K=80的標(biāo)準(zhǔn)噴頭。圖3-13標(biāo)準(zhǔn)層最不利作用面積圖計(jì)算原理參照《自動(dòng)噴水滅火系統(tǒng)設(shè)計(jì)規(guī)范GB50084-2017》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/minP--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（kPa/m）dj--管道的計(jì)算內(nèi)徑（m）qg--管道設(shè)計(jì)流量（L/min）Ch--海登—威廉系數(shù)，見表1管道類型Ch鍍鋅鋼管120銅管、不銹鋼管140涂覆鋼管、氯化聚氯乙烯（PVC-C）管1504、沿程水頭損失：式中：L--管段長度m5、局部損失（采用當(dāng)量長度法）：(當(dāng)量)式中：L(當(dāng)量)--管段當(dāng)量長度，單位m(《自動(dòng)噴水滅火系統(tǒng)設(shè)計(jì)規(guī)范》附錄C)6、總損失：7、終點(diǎn)壓力：管段名稱起點(diǎn)壓力mH2O流量L/s管長(m)當(dāng)量長度管徑(mm)特性K水力坡降流速m/s水頭損失mH2O終點(diǎn)壓力mH2O1-27.001.111.940.2025802.071.900.457.4540-27.221.130.260.8025802.131.930.237.452-37.452.243.052.1032802.132.281.128.5741-37.881.181.940.9025802.312.010.678.5442-38.311.210.260.9025802.422.070.298.603-48.574.632.982.7040803.863.462.2310.814-510.816.013.093.1050801.912.761.2012.0143-511.271.411.141.0025803.212.410.7011.975-612.017.420.803.1050802.823.401.1213.1344-611.921.452.401.0025803.382.481.1713.096-713.138.871.063.1050803.924.071.6614.797-814.7910.492.803.6050805.344.813.4918.288-918.2812.281.524.3065802.053.371.2219.5045-4611.231.411.940.8025803.202.400.8912.1249-5011.281.411.850.8025803.212.410.8712.1456-5011.701.440.400.8025803.332.450.4112.1150-5112.142.853.052.1032803.332.891.7513.8957-5112.911.511.850.9025803.642.581.0213.9358-5113.341.530.400.9025803.762.620.5013.8451-5213.895.892.982.7040806.024.403.4917.3852-917.387.643.093.8550802.973.502.1119.4953-4611.761.440.260.8025803.342.460.3612.1246-4712.122.853.102.1032803.332.891.7613.8954-4712.801.501.940.9025803.612.571.0513.8455-4713.451.540.260.9025803.782.630.4513.9047-4813.895.893.002.7040806.024.403.5017.3948-917.397.643.103.8550802.983.502.1119.509-1019.5027.560.984.6080803.965.362.2521.7510-1121.7529.521.844.6080804.505.742.9524.7159-6014.361.591.880.8025804.022.721.1015.4663-6014.981.630.270.8025804.182.780.4615.4460-6115.463.223.102.1032804.173.272.2117.6764-6116.411.701.880.9025804.552.911.2917.6965-6117.061.730.270.9025804.712.960.5617.6261-6217.676.653.002.7040807.554.974.3922.0662-1122.068.633.103.8550803.723.952.6424.7066-6714.371.591.940.8025804.022.721.1215.5070-6715.041.630.260.8025804.192.780.4515.4967-6815.503.223.052.1032804.183.272.1917.6971-6816.411.701.940.9025804.552.911.3217.7272-6817.171.740.260.9025804.742.970.5617.7368-6917.696.662.982.7040807.574.974.3822.0769-1122.078.643.093.8550803.733.962.6424.7111-1224.7146.781.164.60808010.549.106.1930.9012-1330.9049.123.004.60808011.539.568.9439.8313-1439.8351.772.025.40808012.7110.079.6249.4573-7429.282.271.940.8025807.773.882.1731.4577-7829.422.281.850.8025807.803.892.1131.5384-7828.002.220.400.8025807.453.800.9128.9178-7931.534.503.052.1032807.764.574.0735.6085-7928.002.221.850.9025807.453.802.0930.0986-7928.002.220.400.9025807.453.800.9928.9979-8035.608.952.982.70408013.056.687.5643.1680-1443.1611.703.094.1050806.555.374.8047.9681-7428.002.220.260.8025807.453.800.8128.8174-7531.454.503.102.1032807.744.574.1035.5682-7528.002.221.940.9025807.453.802.1630.1683-7528.002.220.260.9025807.453.800.8828.8875-7635.568.943.002.70408013.046.677.5843.1376-1443.1311.703.104.1050806.545.364.8047.9414-1549.4575.170.986.10100806.708.474.8454.2915-1654.2978.271.846.10100807.228.825.8560.1487-8835.892.521.880.8025809.384.302.5638.4691-9235.922.521.940.8025809.384.302.6238.5498-9228.002.220.260.8025807.453.800.8128.8192-9338.544.743.052.1032808.544.824.4843.0299-9328.002.221.940.9025807.453.802.1630.16100-9328.002.220.260.9025807.453.800.8828.8893-9443.029.182.982.70408013.706.867.9450.9694-1650.9612.183.094.1050807.055.595.1756.1395-8828.002.220.270.8025807.453.800.8128.8188-8938.464.743.102.1032808.534.814.5342.9896-8928.002.221.880.9025807.453.802.1130.1197-8928.002.220.270.9025807.453.800.8928.8989-9042.989.183.002.70408013.706.867.9650.9490-1650.9412.183.104.1050807.055.585.1856.1216-1760.14102.631.166.101008011.9311.568.8368.9717-1868.97106.123.006.101008012.6911.9611.7780.7418-1980.74109.891.086.101008013.5312.389.9190.65101-10253.493.071.080.80258013.565.252.5956.08105-10228.002.221.070.8025807.453.801.4329.43102-10356.085.293.052.10328010.485.385.5061.58106-10328.002.221.100.9025807.453.801.5229.52107-10328.002.221.050.9025807.453.801.4829.48103-10461.589.743.092.70408015.277.279.0270.60108-10428.002.221.121.0025807.453.801.6129.61109-10428.002.221.031.0025807.453.801.5429.54104-1970.6014.183.014.1050809.346.506.7777.3819-2090.65124.081.087.751008016.9413.9815.26105.91110-11164.383.371.990.80258016.105.764.5868.96114-11128.002.220.260.8025807.453.800.8028.80111-11268.965.593.052.10328011.595.686.0975.05115-11228.002.221.990.9025807.453.802.2030.20116-11228.002.220.260.9025807.453.800.8828.88112-11375.0510.042.982.70408016.157.499.3584.41113-2084.4113.903.094.1050808.996.376.5991.0020-21105.91137.970.849.20150802.886.922.94108.8521-22108.85142.363.009.20150803.057.143.79112.6422-23112.64146.812.579.20150803.237.373.87116.51117-11856.143.152.550.80258014.185.384.8560.98118-11960.986.431.222.10328015.006.535.0866.07122-12328.002.222.500.8025807.453.802.5130.51123-11930.514.541.032.1032807.894.622.5133.02119-12066.0710.973.202.70408019.038.1911.4577.52124-12028.002.221.221.0025807.453.801.6929.69125-12028.002.221.031.0025807.453.801.5429.54120-12177.5215.413.203.10508010.907.077.0084.52126-12128.002.221.221.0025807.453.801.6929.69127-12128.002.221.031.0025807.453.801.5429.54121-2384.5219.862.834.10508017.419.1012.3096.82128-12969.083.491.080.80258017.195.963.2972.37132-12928.002.221.070.8025807.453.801.4329.43129-13072.375.713.102.10328012.065.806.4078.76133-13028.002.221.080.9025807.453.801.5029.50134-13028.002.221.070.9025807.453.801.5029.50130-13178.7610.163.102.70408016.517.589.7788.53135-13128.002.221.081.0025807.453.801.5829.58136-13128.002.221.071.0025807.453.801.5829.58131-2388.5314.603.134.1050809.866.697.2795.8023-24116.51181.270.439.20150804.769.104.68121.1924-25121.19185.903.009.20150804.999.336.21127.4025-26127.40190.642.849.20150805.239.576.42133.82137-13881.843.801.960.80258020.106.495.6687.50141-13828.002.220.190.8025807.453.800.7528.75138-13987.506.023.102.10328013.306.127.0594.55142-13928.002.221.960.9025807.453.802.1730.17143-13928.002.220.190.9025807.453.800.8328.83139-14094.5510.473.002.70408017.457.8110.14104.70140-26104.7014.763.104.10508010.066.777.39112.08144-14582.043.801.940.80258020.156.505.6387.67148-14528.002.220.260.8025807.453.800.8128.81145-14687.676.033.052.10328013.316.126.9994.66149-14628.002.221.940.9025807.453.802.1630.16150-14628.002.220.260.9025807.453.800.8828.88146-14794.6610.472.982.70408017.477.8210.12104.78147-26104.7814.773.094.10508010.076.777.38112.1626-27133.82220.170.169.20150806.8311.056.52140.3427-28140.34225.153.009.20150807.1111.308.85149.1928-29149.19230.283.009.20150807.4211.559.23158.4129-30158.41235.570.169.20150807.7411.827.38165.80151-152102.184.252.080.80258024.687.257.25109.43154-15228.002.220.120.8025807.453.800.7028.70152-153109.436.473.102.10328015.176.578.05117.48155-15328.002.222.080.9025807.453.802.2730.27156-15328.002.220.120.9025807.453.800.7728.77153-30117.4810.916.103.00408018.858.1517.49134.97157-158102.234.251.990.80258024.697.257.03109.26161-15828.002.220.260.8025807.453.800.8028.80158-159109.266.473.052.10328015.186.577.97117.23162-15928.002.221.990.9025807.453.802.2030.20163-15928.002.220.260.9025807.453.800.8828.88159-160117.2310.912.982.70408018.868.1510.92128.15160-30128.1515.673.094.10508011.237.188.23136.3830-31165.80262.152.729.20150809.4313.1511.46177.25164-165109.684.401.840.80258026.367.517.10116.78168-16528.002.220.310.8025807.453.800.8428.84165-166116.786.623.102.10328015.856.738.40125.18169-16628.002.221.840.9025807.453.802.0830.08170-16628.002.220.310.9025807.453.800.9228.92166-167125.1811.073.002.70408019.348.2611.24136.43167-31136.4315.973.104.10508011.647.328.54144.97171-172109.724.401.900.80258026.367.527.26116.98175-17228.002.220.300.8025807.453.800.8428.84172-173116.986.623.052.10328015.856.738.32125.30176-17328.002.221.900.9025807.453.802.1330.13177-17328.002.220.300.9025807.453.800.9128.91173-174125.3011.072.982.70408019.358.2611.21136.51174-31136.5115.973.094.10508011.647.328.53145.0431-32177.25294.090.129.201508011.6614.7611.08188.3432-33188.34299.863.009.201508012.0915.0415.04203.3833-34203.38305.852.609.201508012.5415.3515.09218.4634-35218.46312.050.429.201508013.0115.6612.77231.23178-17993.004.051.851.1032806.384.121.9294.92181-3528.002.223.100.4025807.453.802.6630.66182-17928.002.220.401.1032802.102.260.3228.32179-18094.926.272.981.50258050.8210.7223.22118.13180-35118.1310.843.091.902580139.7518.5171.11189.2435-36231.23325.112.689.201508014.0416.3117.01248.2336-37248.23331.730.189.201508014.5716.6413.94262.17183-184164.225.381.840.80258038.289.1910.31174.52187-188164.285.381.900.80258038.309.2010.54174.82194-18828.002.220.300.8025807.453.800.8428.84188-189174.827.613.052.10328020.487.7310.75185.58195-18928.002.221.900.9025807.453.802.1330.13196-18928.002.220.300.9025807.453.800.9128.91189-190185.5812.052.982.70408022.659.0013.12198.70190-37198.7017.973.094.10508014.478.2410.61209.31191-18428.002.220.310.8025807.453.800.8428.84184-185174.527.603.102.10328020.477.7310.86185.38192-18528.002.221.840.9025807.453.802.0830.08193-18528.002.220.310.9025807.453.800.9228.92185-186185.3812.053.002.70408022.648.9913.16198.54186-37198.5417.973.104.10508014.478.2410.62209.1637-38262.17367.673.129.201508017.6318.4522.14284.3238-39284.32374.750.989.201508018.2618.8018.95303.27197-198152.625.192.250.80258035.778.8611.13163.74198-199163.7410.560.301.80328037.6010.738.04171.78199-200171.7810.563.051.20328037.6010.7316.30188.08205-20628.002.222.250.8025807.453.802.3230.32206-20030.324.540.302.1032807.874.611.9232.24200-201188.0815.102.982.70408034.3711.2719.91207.99207-20128.002.220.561.0025807.453.801.1829.18201-202207.9917.323.093.10508013.527.948.53216.52202-203216.5217.320.721.50508013.527.943.06219.58203-204219.5823.540.773.10508023.8610.799.41228.99208-20428.002.222.401.0025807.453.802.5830.58204-39228.9925.771.253.10508028.1911.8112.50241.49計(jì)算結(jié)果:所選作用面積:1898.26平方米總流量:25.77L/s平均噴水強(qiáng)度:0.81L/min.平方米最不利點(diǎn)噴頭壓力:7.00米水柱已知作用面積為1992m2，最不利作用面積內(nèi)流量Qz為25.77L/s。平均噴水強(qiáng)度符合要求。一層噴淋平面最不利點(diǎn)如圖所示：計(jì)算如下：計(jì)算原理參照《自動(dòng)噴水滅火系統(tǒng)設(shè)計(jì)規(guī)范GB50084-2017》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/minP--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（kPa/m）dj--管道的計(jì)算內(nèi)徑（m）qg--管道設(shè)計(jì)流量（L/min）Ch--海登—威廉系數(shù)，見表1管道類型Ch鍍鋅鋼管120銅管、不銹鋼管140涂覆鋼管、氯化聚氯乙烯（PVC-C）管1504、沿程水頭損失：式中：L--管段長度m5、局部損失（采用當(dāng)量長度法）：(當(dāng)量)式中：L(當(dāng)量)--管段當(dāng)量長度，單位m(《自動(dòng)噴水滅火系統(tǒng)設(shè)計(jì)規(guī)范》附錄C)6、總損失：7、終點(diǎn)壓力：管段名稱起點(diǎn)壓力mH2O流量L/s管長(m)當(dāng)量長度管徑(mm)管內(nèi)徑(mm)特性K水力坡降流速m/s水頭損失mH2O高差損失mH2O終點(diǎn)壓力mH2O1-27.001.113.100.202527.3802.071.900.700.007.702-37.702.283.102.103235.4802.202.311.170.008.863-48.863.532.072.704041.3802.332.631.130.0010.0031-328.201.203.100.802527.3802.392.060.950.009.1632-49.162.471.032.253235.4802.562.510.860.0010.014-510.006.003.403.605052.7801.902.751.360.0011.3533-347.821.173.100.802527.3802.292.010.910.008.7334-358.732.423.102.103235.4802.452.451.300.0010.0335-510.033.752.073.004041.3802.612.801.350.0011.3836-379.301.283.100.802527.3802.692.191.070.0010.3737-510.372.631.032.403235.4802.882.681.010.0011.375-611.3512.383.404.306568.1802.083.401.640.0012.9938-398.971.263.100.802527.3802.602.151.030.0010.0039-4010.002.593.102.103235.4802.782.631.480.0011.4840-611.484.012.073.004041.3802.962.991.530.0013.0141-4210.611.373.100.802527.3803.042.341.210.0011.8242-611.822.811.032.403235.4803.252.861.140.0012.956-712.9919.203.404.608080.9802.033.741.660.0014.6543-4410.121.343.100.802527.3802.912.281.160.0011.2744-4511.272.753.102.103235.4803.112.791.650.0012.9245-712.924.262.073.004041.3803.303.181.710.0014.6346-4712.031.463.100.802527.3803.412.491.360.0013.3947-713.392.991.032.403235.4803.653.041.280.0014.667-814.6526.453.404.608080.9803.675.152.990.0017.6448-4912.251.473.100.802527.3803.472.511.380.0013.6349-5013.633.023.102.103235.4803.713.071.970.0015.6050-815.604.682.073.004041.3803.943.492.030.0017.6351-5214.551.603.100.802527.3804.072.741.620.0016.1652-816.163.291.032.403235.4804.353.341.520.0017.688-917.6434.423.405.408080.9805.976.705.360.0023.0053-5416.081.683.100.802527.3804.462.881.770.0017.8554-5517.853.463.102.103235.4804.773.512.530.0020.3855-920.385.352.073.004041.3805.054.002.610.0022.9956-5718.981.833.100.802527.3805.203.132.070.0021.0557-921.053.761.032.403235.4805.553.821.940.0022.999-1023.0043.533.806.10100106.3802.444.902.460.0025.4658-5921.221.933.000.802527.3805.773.312.230.0023.4559-1023.453.970.862.403235.4806.154.032.040.0025.4960-1023.412.032.141.002527.3806.323.472.030.0025.4310-1125.4649.533.156.10100106.3803.105.582.920.0028.3861-6223.632.043.000.802527.3806.373.492.470.0026.0962-1126.094.190.862.403235.4806.794.252.250.0028.3563-1126.142.152.141.002527.3806.993.672.240.0028.3811-1228.3855.873.156.10100106.3803.876.293.650.0032.0464-6526.742.173.000.802527.3807.143.712.770.0029.5165-1229.514.450.862.403235.4807.614.522.530.0032.0466-1228.002.222.141.002527.3807.453.802.390.0030.3912-1332.0462.542.187.75100106.3804.777.054.830.0036.8767-6818.701.823.250.802527.3805.133.102.120.0020.8268-6920.823.732.952.103235.4805.493.792.830.0023.6572-7322.892.012.300.802527.3806.193.431.960.0024.8473-7424.844.102.802.103235.4806.544.173.270.0028.1174-7528.116.330.572.404041.3806.884.722.080.0030.1975-7630.196.332.401.504041.3806.884.722.740.0032.9377-7819.801.873.350.802527.3805.413.192.290.0022.0978-6922.093.840.502.103235.4805.793.901.540.0023.6269-7023.657.582.852.704041.3809.605.655.430.0029.0870-7129.089.842.133.605052.7804.754.512.770.0031.8579-8021.181.931.630.802527.3805.763.301.420.0022.6083-8424.552.082.800.802527.3806.603.562.420.0026.9884-8526.984.262.802.103235.4807.024.333.510.0030.4885-7630.486.580.572.704041.3807.404.912.470.0032.9576-1332.9312.910.824.105052.7807.855.923.940.0036.8786-8021.221.931.620.802527.3805.773.311.430.0022.6480-8122.603.872.202.103235.4805.863.932.570.0025.1787-8123.842.051.130.902527.3806.423.501.330.0025.1781-8225.175.921.522.704041.3806.084.422.620.0027.7988-8923.612.041.630.802527.3806.373.491.570.0025.1990-8923.632.041.630.802527.3806.373.491.580.0025.2089-8225.194.081.682.253235.4806.484.152.590.0027.7882-7127.7910.004.583.605052.7804.894.584.080.0031.8771-1331.8519.844.924.906568.1804.995.454.990.0036.8513-1436.8795.293.239.20150159.3801.454.781.840.0038.7091-9220.881.921.200.802527.3805.683.281.160.0022.0496-9220.891.921.200.802527.3805.683.281.160.0022.0592-9322.043.843.152.103235.4805.783.903.090.0025.1397-9323.732.051.200.902527.3806.403.501.370.0025.1098-9323.732.051.200.902527.3806.403.501.370.0025.1093-9425.137.933.152.704041.38010.455.926.230.0031.3799-9428.002.221.201.002527.3807.453.801.670.0029.67100-9428.002.221.201.002527.3807.453.801.670.0029.6794-9531.3712.383.053.605052.7807.265.674.920.0036.29101-9528.002.222.901.002527.3807.453.802.960.0030.96102-9528.002.220.601.002527.3807.453.801.220.0029.2295-1436.2916.820.874.906568.1803.674.622.160.0038.4514-1538.70112.112.509.20150159.3801.965.632.340.0041.0415-1641.04112.110.974.30150159.3801.965.631.050.0042.0916-1742.09112.118.014.30150159.3801.965.632.460.0044.55103-10417.531.762.900.802527.3804.833.001.820.0019.35104-10519.353.612.902.103235.4805.153.662.620.0021.98105-10621.985.572.292.704041.3805.444.162.770.0024.74110-11122.061.972.900.802527.3805.983.372.260.0024.31111-11224.314.042.902.103235.4806.364.113.240.0027.56112-11327.566.252.342.704041.3806.724.663.450.0031.01116-11717.611.762.950.802527.3804.853.011.860.0019.47117-11819.473.622.952.103235.4805.173.672.660.0022.13118-11922.135.590.812.404041.3805.474.171.790.0023.92119-10623.925.590.051.504041.3805.474.170.860.0024.78106-10724.7411.173.203.855052.7806.005.124.310.0029.06120-12120.511.902.900.802527.3805.593.252.110.0022.62121-12222.623.902.902.103235.4805.953.963.030.0025.65122-10725.656.032.293.004041.3806.284.503.390.0029.04123-12421.161.932.950.802527.3805.753.302.200.0023.36124-12523.363.962.952.103235.4806.134.033.160.0026.52125-10726.526.130.813.004041.3806.484.572.520.0029.04107-10829.0623.323.154.608080.9802.914.542.300.0031.36126-12722.041.972.750.802527.3805.973.372.160.0024.20127-12824.204.043.202.103235.4806.354.103.430.0027.63128-10827.636.252.443.004041.3806.714.663.730.0031.36129-13022.752.002.850.802527.3806.153.422.290.0025.04130-13125.044.103.152.103235.4806.544.173.500.0028.54131-10828.546.350.963.004041.3806.924.742.790.0031.34108-10931.3635.912.704.608080.9806.466.994.810.0036.17132-13328.002.223.200.802527.3807.453.803.040.0031.04133-10931.044.562.442.403235.4807.964.643.930.0034.97134-13528.002.223.150.802527.3807.453.803.000.0031.00135-10931.004.560.962.403235.4807.954.632.720.0033.73109-1736.1745.042.106.208080.9809.828.768.310.0044.47136-13722.802.012.950.802527.3806.163.432.360.0025.16137-13825.164.112.952.103235.4806.574.183.380.0028.54138-11328.546.360.812.704041.3806.944.742.480.0031.02113-11431.0112.603.603.855052.7807.515.785.700.0036.72139-14026.032.142.900.802527.3806.973.662.630.0028.66140-14128.664.392.902.103235.4807.414.463.780.0032.44141-11432.446.782.343.004041.3807.825.064.260.0036.70142-14326.912.182.950.802527.3807.183.722.750.0029.65143-14429.654.472.952.103235.4807.654.543.940.0033.59144-11433.596.900.813.004041.3808.075.153.140.0036.73114-11536.7226.293.104.608080.9803.635.112.850.0039.56145-14628.002.223.550.802527.3807.453.803.310.0031.31146-14731.314.573.552.103235.4807.994.654.600.0035.91147-11535.917.090.743.004041.3808.495.293.240.0039.15148-14928.002.223.550.802527.3807.453.803.310.0031.31149-11531.314.572.812.403235.4807.994.654.240.0035.55115-1739.5637.950.556.208080.9807.167.384.930.0044.4917-1844.55195.108.989.20150159.3805.469.7910.120.0054.6718-1954.67195.101.004.30150159.3805.469.792.950.0057.6219-2057.62195.107.524.30150159.3805.469.796.580.0064.20150-15112.041.463.450.802527.3803.412.491.480.0013.52151-15213.523.003.452.103235.4803.673.052.080.0015.60152-15315.604.663.452.404041.3803.913.482.330.0017.93153-15417.936.443.452.704041.3807.104.814.450.0022.38154-15522.388.433.453.105052.7803.563.862.380.0024.76155-15624.7610.523.453.105052.7805.374.823.590.0028.35156-15728.3512.751.763.855052.7807.675.854.390.0032.74165-16631.882.373.300.802527.3808.404.053.510.0035.39166-16735.394.871.762.103235.4808.984.953.530.0038.92171-17214.301.593.450.802527.3804.002.711.740.0016.04172-17316.043.273.452.103235.4804.303.322.430.0018.47173-17418.475.083.452.404041.3804.573.792.730.0021.20174-17521.207.013.452.704041.3808.315.235.210.0026.41175-17626.419.173.453.105052.7804.174.202.780.0029.19176-15729.1911.441.693.855052.7806.275.243.540.0032.73157-15832.7424.193.455.408080.9803.114.712.810.0035.55177-17813.071.523.450.802527.3803.682.591.600.0014.67178-17914.673.133.452.103235.4803.963.182.240.0016.91179-18016.914.853.452.404041.3804.213.622.510.0019.42180-18119.426.703.452.704041.3807.665.004.800.0024.22181-18224.228.773.453.105052.7803.844.022.560.0026.78182-18326.7810.953.453.105052.7805.785.023.860.0030.65183-15830.6513.271.764.105052.7808.266.084.930.0035.58184-18515.531.663.450.802527.3804.322.831.870.0017.40185-18617.403.413.452.103235.4804.643.462.620.0020.03186-18720.035.293.452.404041.3804.933.952.940.0022.97187-18822.977.303.452.704041.3808.965.455.620.0028.59188-18928.599.553.453.105052.7804.494.383.000.0031.59189-15831.5911.911.694.105052.7806.765.463.990.0035.58158-15935.5549.363.456.10100106.3803.085.563.000.0038.54190-19114.221.583.450.802527.3803.982.711.730.0015.94191-19215.943.263.452.103235.4804.273.312.420.0018.36192-19318.365.063.452.404041.3804.553.782.710.0021.08193-19421.086.993.452.704041.3808.275.225.180.0026.26194-19526.269.143.453.105052.7804.144.192.770.0029.03195-19629.0311.403.453.105052.7806.245.234.170.0033.20196-15933.2013.821.764.105052.7808.916.345.320.0038.52197-19816.901.733.450.802527.3804.672.952.020.0018.92198-19918.923.553.452.103235.4805.013.612.840.0021.76199-20021.765.513.452.404041.3805.334.123.180.0024.94200-20124.947.613.452.704041.3809.685.686.070.0031.01201-20231.019.953.453.105052.7804.854.563.240.0034.25202-15934.2512.411.694.105052.7807.295.694.310.0038.55159-16038.5475.603.457.75100106.3806.778.527.740.0046.28203-20417.281.753.450.802527.3804.772.982.070.0019.35204-20519.353.593.452.103235.4805.123.652.900.0022.24205-20622.245.573.452.404041.3805.444.163.250.0025.49206-20725.497.693.452.704041.3809.885.746.190.0031.68207-20831.6810.063.453.105052.7804.954.613.300.0034.99208-20934.9912.543.453.105052.7807.445.754.970.0039.96209-16039.9615.201.764.105052.78010.626.976.340.0046.30210-21120.481.903.450.802527.3805.583.252.420.0022.90211-21222.903.913.452.103235.4805.983.973.390.0026.28212-21326.286.063.452.404041.3806.364.533.790.0030.08213-21430.088.373.452.704041.38011.536.257.230.0037.31214-21537.3110.933.453.105052.7805.775.013.850.0041.16215-16041.1613.631.694.105052.7808.686.255.120.0046.29160-16146.28104.423.459.20150159.3801.725.242.220.0048.50216-21718.161.793.450.802527.3804.993.062.160.0020.32217-21820.323.683.452.103235.4805.353.743.030.0023.35218-21923.355.713.452.404041.3805.694.263.400.0026.75219-22026.757.883.452.704041.38010.335.896.480.0033.23220-22133.2310.313.453.105052.7805.174.723.460.0036.68221-22236.6812.853.453.105052.7807.785.895.200.0041.88222-16141.8815.571.764.105052.78011.107.146.630.0048.51223-22421.491.953.450.802527.3805.843.332.530.0024.02224-22524.024.013.452.103235.4806.254.073.540.0027.56225-22627.566.213.452.404041.3806.644.643.960.0031.52226-22731.528.573.452.704041.38012.056.407.560.0039.08227-22839.0811.193.453.105052.7806.035.134.030.0043.11228-16143.1113.951.694.105052.7809.066.405.350.0048.46161-16248.50133.943.729.20150159.3802.726.723.590.0052.08229-23028.002.223.250.802527.3807.453.803.080.0031.08230-16231.084.561.762.403235.4807.964.643.380.0034.45231-16228.002.221.491.002527.3807.453.801.890.0029.89162-16352.08140.733.059.20150159.3802.987.063.730.0055.81232-23328.002.222.400.802527.3807.453.802.430.0030.43233-16330.434.540.562.403235.4807.884.612.380.0032.81163-16455.81145.273.359.20150159.3803.167.294.050.0059.86234-23528.002.222.400.802527.3807.453.802.430.0030.43235-16430.434.540.562.403235.4807.884.612.380.0032.81164-2059.86149.802.119.20150159.3803.357.523.860.0063.72236-16728.002.221.540.902527.3807.453.801.860.0029.86167-16838.927.092.952.704041.3808.495.294.890.0043.82237-23828.002.222.400.802527.3807.453.802.430.0030.43238-16830.434.540.462.253235.4807.884.612.180.0032.61168-16943.8211.633.503.105052.7806.475.334.360.0048.172