导热油换热器计算

导热油换热器计算序号项目计算公式或数据单位数值1换热量Qckw14002烟气量VhNm3/h290003进口烟温t1h℃4304出口烟温t2h℃2806平均烟温t2hpj℃3557比热CPhpj355℃kJ/kg℃1.1328密度ρfhpj355℃kg/Nm30.5669标况下密度ρ0hkg/Nm31.29510导热系统λfhpj355℃w/m℃0.05311粘度μfhpj355℃kg/ms0.0000312普兰德数Prh355℃0.645烟气放热13烟气放热QhVcρfhCphpj(t1h-t2h)kw1771.344214导热油吸Qc3%损失与3%损失kw1665.063515导热油入口温度t1c℃25016导热油密度ρfcpj275℃kg/m384917导热油比热CPcpj275℃kJ/kg℃2.67518导热油出温t2c设计℃30019平均油温tfcpj(t1c+t2c)/2℃27520导热系统λfcpj275℃℃0.068521粘度μfhpj275℃kg/ms0.0000322普兰德数Prh275℃7.423导热油流量Vcm3/h52.78758924大温差Δtd13025小温差Δtx3026对数温差Δtm(td-tx)/ln(td/tx)℃68.19714427管排数n0设计取用4628管内径d0取用φ25*2.5m0.0229传热面积F设计m2264.4对流管布置30热油流速WVc/(3600n0F0)m/s1.015177231管内雷诺数Rewρd0/μ574590.2832管壁温度油粘度twkg/ms0.000015233比值E1.185275834传热准则Nu0.023Re0.8Pr1/3E2600.726835管内放热系数α0Nuλ/dw/m2C8907.489436横管距S1设计0.0537纵间距S2设计0.0538比值S1/S2139横管空隙b0.02540管长L设计1.241烟通面积Fyn0/2*L*bm21.3842烟速Wy13.42806443润周Un0/2*2*L+n0/2*2b-bm112.67544当量直径d0y4Fy/Um0.048990545管外雷诺数Rewρd0/μ12411.38146传热准则Nuy0.31Re0.6(S1/S2)0.288.64489947管外换热系数αyNuλ/dw/m2C95.8998948污垢系数εm2C/w0.00017249钢管热阻Rλ/dw/m2C13833.33350换热系数K1/(1/α0＋1/αy+1/e+1/R)w/m2C92.72915551传热量QjKFΔTkw1672.029551传热量计算误差ξ|Qj-Qc|/Qj*1005%0.4166189流动阻力计算管程1粗糙度e钢管mm0.04572比值e/d0.0022853摩擦系数fi0.00954沿程长度L76.25沿程阻力P14fiL/d0ρw2/2E-0.14Pa61849.3646弯头数Z1227回弯阻力P24ρw2/2ZPa213491.88油侧总阻力PfP1+P2Pa275341.17烟气侧9横向节距σ1S1/d210斜向节距φ(s1-d)/(s2'-d)0.54704611阻力系数ζ(3.2+0.66(1.7-φ)1.5)Re-0.270.315194412烟气侧阻力Pyζ(n2+1)ρw2/2Pa997.20273