《建筑防排烟系统技术标准》GB51251-2017防排烟计算表

防排烟前室、楼梯间加压送风量计算表,,,,,,,,,,,,,,,,,,,,"★取值说明：

●v-门洞断面风速；楼梯间、前室均送风0.7m/s；楼梯间送风，独立前室不送风1.0m/s；消防电梯前室送风1.0m/s；楼梯间自然通风，前室送风0.6(楼梯间门总面积/前室门总面积+1)m/s；

●△P-漏风门平均压差；0.7m/s时，6.0Pa；1.0m/s时，12Pa；1.2m/s时，17Pa；

●N1-疏散门开启数量；楼梯间：24m以下，2层内疏散门开启，取2；24m以上，3层内疏散门开启，取3；地下楼梯间，1层内疏散门开启，取1；前室，取3，＜3层的按实际层数取；

●N2-漏风门数量；加压楼梯间总门数-N1；

●N3-漏风阀门数量；前室楼层数-3；

●A-单个门漏风面积；1.5m*2.0m,0.018m2；1.2m*2.0m,0.0168m2；1.2m*2.0m,0.012m2",,,

系统编号,消防加压送风部位,,前室送风量,楼梯间送风量,门缝面积,平均压差,漏风门数量,门缝漏风量,门洞面积,门洞风速,开启门数,门洞送风量,阀门面积,漏风阀门数量,阀门漏风量,计算风量,风道截面,风口截面,设计风量,,,,

,层数,部位,Ls=L1+L3(m3/h),Lj=L1+L2(m3/h),A,△P,N2,L2,Ak,v,N1,L1,AF,N3,L3,,按15m/s,按5m/s,,,,,

,,,,,(㎡),(Pa),(个),(m3/s),(㎡),(m/s),(个),(m3/s),(㎡),(个),(m3/s),(m3/h),(㎡),(㎡),(m3/h),,,,

,1,合用前室（1个门）,8100,,,,,,3.2,0.70,1,2.24,0.45,0,0.00,8100,0.15,0.45,9720,,,,

,,楼梯间（带前室）,,16200,0.018,6,0,0.00,3.2,0.70,2,4.48,,,,16200,0.30,0.90,19440,,表5.1.1-1消防电梯前室的加压送风量,,

,,楼梯间（独立）,,29300,0.031,12,4,0.44,3.8,1.00,2,7.68,,,,29300,0.54,1.63,35160,,系统负担高度h（m）,加压送风量(m3/h),

,2,合用前室（1个门）,16200,,,,,,3.2,0.70,2,4.48,0.45,0,0.00,16200,0.30,0.45,19440,,24≤h＜50,"13,800～15,700",

,,楼梯间（带前室）,,16200,0.018,6,0,0.00,3.2,0.70,2,4.48,,,,16200,0.30,0.45,19440,,50≤h＜100,"16,000～20,000",

,,楼梯间（独立）,,40000,0.031,12,4,0.44,3.8,0.70,4,10.64,,,,40000,0.74,1.11,48000,,,,

,3,合用前室（1个门）,24200,,,,,,3.2,0.70,3,6.72,0.45,0,0.00,24200,0.45,0.45,29040,,表5.1.1-2楼梯间自然通风，前室、合用前室的加压送风量,,

,,楼梯间（带前室）,,16300,0.018,6,1,0.05,3.2,0.70,2,4.48,,,,16300,0.30,0.30,19560,,系统负担高度h（m）,加压送风量(m3/h),

,,楼梯间（独立）,,16300,0.018,6,1,0.05,3.2,0.70,2,4.48,,,,16300,0.30,0.30,19560,,24＜h≤50,"16,300～18,100",

,6,合用前室（1个门）,24700,,,,,,3.2,0.70,3,6.72,0.46,3,0.11,24700,0.46,0.46,29640,,50＜h≤100,"18,400～22,000",

,,楼梯间（带前室）,,16800,0.018,6,4,0.18,3.2,0.70,2,4.48,,,,16800,0.31,0.47,20160,,,,

,,楼梯间（独立）,,16800,0.018,6,4,0.18,3.2,0.70,2,4.48,,,,16800,0.31,0.47,20160,,表5.1.1-3前室不送风，封闭楼梯间、防烟楼梯间的楼梯间加压送风量,,

,8,合用前室（1个门）,24900,,,,,,3.2,0.70,3,6.72,0.46,5,0.19,24900,0.46,0.46,29880,,系统负担高度h（m）,加压送风量(m3/h),

,,楼梯间（带前室）,,17200,0.018,6,6,0.27,3.2,0.70,2,4.48,,,,17200,0.32,0.32,20640,,24＜h≤50,"25,400～28,700",

,,楼梯间（独立）,,17200,0.018,6,6,0.27,3.2,0.70,2,4.48,,,,17200,0.32,0.32,20640,,50＜h≤100,"40,000～46,400",

,12,合用前室（1个门）,25200,,,,,,3.2,0.70,3,6.72,0.35,9,0.26,25200,0.47,0.35,30240,,,,

,,楼梯间（带前室）,,26300,0.018,12,9,0.58,3.2,0.70,3,6.72,,,,26300,0.49,0.49,31560,,表5.1.1-4防烟楼梯间的楼梯间及合用前室的分别加压送风量,,

,,楼梯间（独立）,,26300,0.018,12,9,0.58,3.2,0.70,3,6.72,,,,26300,0.49,0.37,31560,,系统负担高度h（m）,送风部位,加压送风量(m3/h)

,18,合用前室（1个门）,26400,,,,,,3.2,0.70,3,6.72,0.49,15,0.61,26400,0.49,0.49,31680,,24＜h≤50,楼梯间,"17,800～20,200"

,,楼梯间（带前室）,,26700,0.018,6,15,0.68,3.2,0.70,3,6.72,,,,26700,0.49,0.25,32040,,,合用前室,"10,200～12,000"

,,楼梯间（独立）,,26700,0.018,6,15,0.68,3.2,0.70,3,6.72,,,,26700,0.49,0.25,32040,,50＜h≤100,楼梯间,"28,200～32,600"

,20,合用前室（1个门）,26800,,,,,,3.2,0.70,3,6.72,0.50,17,0.71,26800,0.50,0.50,32160,,,合用前室,"12,300～15,800"

,,楼梯间（带前室）,,27000,0.018,6,17,0.77,3.2,0.70,3,6.72,,,,27000,0.50,0.21,32400,,,,

,,楼梯间（独立）,,27000,0.018,6,17,0.77,3.2,0.70,3,6.72,,,,27000,0.50,0.21,32400,,注：1表5.1.1-1至表5.1.1-4的风量按开启2.0m×1.6m的双扇门确定。当采用单扇门时，,,

,24,合用前室（1个门）,27400,,,,,,3.2,0.70,3,6.72,0.51,21,0.89,27400,0.51,0.51,32880,,"其风量可乘以0.75系数计算，当设有多个疏散门时,其风量应乘以开启疏散门的数量,最",,

,,楼梯间（带前室）,,27700,0.018,6,21,0.96,3.2,0.70,3,6.72,,,,27700,0.51,0.19,33240,,多按3扇疏散门开启计算；,,

,,楼梯间（独立）,,27700,0.018,6,21,0.96,3.2,0.70,3,6.72,,,,27700,0.51,0.19,33240,,2表5.1.1-1至表5.1.1-4中未考虑防火分区跨越楼层时的情况；当防火分区跨越楼层时应按照本规范公式5.1.4～公式5.1.7重新计算；,,

,26,合用前室（1个门）,27700,,,,,,3.2,0.70,3,6.72,0.51,23,0.97,27700,0.51,0.51,33240,,3表中风量的选取应按建筑高度或层数、风道材料、防火门漏风量等因素综合确定。,,

,,楼梯间（带前室）,,28000,0.018,6,23,1.05,3.2,0.70,3,6.72,,,,28000,0.52,0.17,33600,,,,

,,楼梯间（独立）,,28000,0.018,6,23,1.05,3.2,0.70,3,6.72,,,,28000,0.52,0.17,33600,,,,

,28,合用前室（1个门）,28100,,,,,,3.2,0.70,3,6.72,0.52,25,1.