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海门市大生冷却设备有限公司计算依据:GB/T50392-2006机械通风冷却塔工艺设计规范计算程序:EXCEL冷却塔型号:OT-Ⅱ(RC)-2100数据输入:汪益中设计参数大气压P100.4Kpa干球温度θ33℃湿球温度τ29℃处理水量Q2100m3/h进水温度t139℃出水温度t232℃风机直径D7m风机数量1台轮毂直径d1.3m填料高度1.5m淋水面积F144m2进风口高度4.5m热力计算302.16K饱和水蒸汽压的计算公式:lgP=2.0057173-3142.305/T+3142.305/373.16-0.0024804*373.16+0.0024804*T+8.2lg(373.16/T)0.60253湿球时饱和水蒸汽压Pτ=Kpa306.16K0.70149干球时饱和水蒸汽压Pθ=Kpa空气相对湿度φ=[Pτ-0.000662P(θ-τ)]/Pθ=0.743373进塔干空气密度ρ1=(P-φPθ)*103/[287.14(273+θ)]=kg/m3选用气水比λ0.650.70.750.80.85风量G12407781336223143166715271111622556m3/h进塔湿空气比焓:h1=1.005θ+0.622(2500.8+1.846θ)*φ*Pθ/(P-φ*Pθ)=94.79KJ/kg(DA)蒸发带走热量系数:K=1-t2/[586-0.56(t2-20)]=0.944759不同气水比出塔湿空气比焓:h2=h1+4.1868(t1-t2)/(Kλ)=142.5157139.107136.1524133.567131.2863KJ/kg(DA)进水绝对温度:T(t1)=273.16+t1=312.16K0.84453进水时饱和水蒸汽压Pt1=6.99083Kpa出塔饱和空气比焓:h2=158.961KJ/kg(DA)温差分段数:n=8温差等分值:δt=0.875℃δh=(h2-h1)/n=5.9656245.539515.1702074.847074.561948t1-δt=38.125℃t1-2δt=37.25℃t1-3δt=36.375℃t1-4δt=35.5℃t1-5δt=34.625℃t1-6δt=33.75℃逆流冷却塔热力阻力计算书1.100116165湿球绝对温度:Tτ=273.16+τ=湿球温度时的饱和水蒸汽压对数:lgPτ=4.004328366干球绝对温度:Tθ=273.06+θ=进水温度时的饱和水蒸汽压对数:lgPt1=干球温度时的饱和水蒸汽压对数:lgPθ=5.029061652地址:江苏海门市三厂工业园区电话:0513-8260158782659238传真:0513-82748530海门市大生冷却设备有限公司t1-7δt=32.875℃T1=273.16+t1-δt=311.285℃T2=273.16+t1-2δt=310.41℃T3=273.16+t1-3δt=309.535℃T4=273.16+t1-4δt=308.66℃T5=273.16+t1-5δt=307.785℃T6=273.16+t1-6δt=306.91℃T7=273.16+t1-7δt=306.035℃T(t2)=273.16+t2=305.16℃0.824196.67098Kpa152.141KJ/kg(DA)0.803596.36192Kpa145.563KJ/kg(DA)0.782856.06533Kpa139.254KJ/kg(DA)0.761995.78079Kpa133.201KJ/kg(DA)0.740985.50788Kpa127.392KJ/kg(DA)0.719855.24621Kpa121.816KJ/kg(DA)0.698574.99539Kpa116.462KJ/kg(DA)0.677154.75504Kpa111.319KJ/kg(DA)理论冷却数:N=4.1868(t1-t2)/(3n)*[1/(h1-h2)+4/(hT1-(h2-δh))+2/(hT2-(h2-2δh))+4/(hT3-(h2-3δh))+2/(hT4-(h2-4δh))+4/(hT5-(h2-5δh))+2/(hT6-(h2-6δh))+4/(hT7-(h2-7δh))+1/(h2-h1)]不同气水比时N1.7628591.580521.4527471.356881.281282折波填料高1.5米,填料特性数Ω=1.89λ0.67填料特性数Ω1.4161651.488261.5586651.627541.695011T7温度时的饱和水蒸汽压:P7=T7温度时饱和空气焓:hT7=T6温度时的饱和水蒸汽压对数:lgP6=T6温度时的饱和水蒸汽压:P6=T6温度时饱和空气焓:hT6=T7温度时的饱和水蒸汽压对数:lgP7=T4温度时饱和空气焓:hT4=T5温度时的饱和水蒸汽压对数:lgP5=T5温度时的饱和水蒸汽压:P5=T2温度时饱和空气焓:hT2=T3温度时的饱和水蒸汽压对数:lgP3=T5温度时饱和空气焓:hT5=T3温度时的饱和水蒸汽压:P3=T3温度时饱和空气焓:hT3=T4温度时的饱和水蒸汽压对数:lgP4=T4温度时的饱和水蒸汽压:P4=T1温度时的饱和水蒸汽压对数:lgP1=T1温度时的饱和水蒸汽压:P1=T2温度时的饱和水蒸汽压对数:lgP2=T2温度时的饱和水蒸汽压:P2=T1温度时饱和空气焓:hT1=T(t2)温度时的饱和水蒸汽压对数:lgP(t2)=T(t2)温度时的饱和水蒸汽压:P(t2)=T(t2)温度时饱和空气焓:h1=11.21.41.61.82理论冷却数地址:江苏海门市三厂工业园区电话:0513-8260158782659238传真:0513-82748530海门市大生冷却设备有限公司由上图曲线可知,当气水比λ=0.75时,Ω>N满足设计容积散质系数βxv=NQ/(KV)=15494.76kg/m3.h填料容积散质系数βxv=4188g0.65q0.33其中空气重量风速g=G*γ/3600/F=3.038194kg/m2.s淋水密度q=Q/F=14.5833m3/m2.h填料容积散质系数βxv=20882.4kg/m3.h填料容积散质系数βxv>设计容积散质系数βxv满足结论:该逆流冷却塔的热力性能完全达到设计要求。通风阻力及风机功率计算进风口面积79.5371m2配水设备气流通过面积129.6m2收水设备气流通过面积141.12m2淋水填料空隙面积129.6m2风筒收缩后断面积37.1573m2塔内湿空气密度γ=1.12943kg/m3进风口阻力P1=0.55γV2/27.76486Pa填料气流转弯P2=0.5γV2/22.15355Pa填料进口突然收缩P3=0.00055Pa淋水填料A=1.784362m=0.746519淋水填料阻力P4=44.473Pa配水装置P5=2.02062Pa收水装置P6=2.33854Pa风机入口部分阻力P7=15Pa总阻力ΣP73.7511Pa风机动压PD=64.6878Pa风机全压Pq=138.439Pa风机轴功率N'=77.873KW选用电机功率N=90KW耗电比N/Q=0.043≤0.045满足GB7190.2-2008规范要求00.20.40.60.811.212345理论冷却数填料特性数地址:江苏海门市三厂工业园区电话:0513-8260158782659238传真:0513-82748530
本文标题:冷却塔热力计算书
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