净化工程空调系统送风管阻力计算方法--净化工程,洁净棚,洁净厂房,净化车间,无尘车间,洁净室,无尘室
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净化工程空调系统送风管阻力计算方法
空调系统送风管阻力计算方法1.计算依据假定流速法 是以风道内空气流速作为控制指标,计算出风道的断面尺寸和压力损失,再按各环路间的压损差值进行调整,以达到平衡。其中,末端高、中效过滤风口的阻力按终阻力计算,即初阻力的2倍。2.计算公式a.计算摩擦阻力系数的公式采用的是柯列勃洛克-怀特公式。b.管段损失 = 沿程损失+局部损失 即:Pg = ΣPl + ΣPd。c.Pdn = Pd1+ Σ(Pm×L+ Pz)。3.计算结果
&&& 百级系统送风管水力计算表
风量m³/h
4.计算汇总&&&& 当前最不利环路的阻力损失为1102.75 Pa。
万级送风管水力计算表
注:计算依据同百级水力计算风管水力计算书(假定流速法)&&&&&&&&&&&&&&&&& 表4.1.2
风量m³/h
4.计算汇总&& 当前最不利环路的阻力损失为1554.5 Pa。
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=(630+42)÷21×6=(630÷21+42÷21)*6=(30+2)*6=30*6+2*6=192,
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