导热油换热器计算.xls

导热油换热器计算.xls

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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t1h4304出口烟温t2h2806平均烟温t2hpj3557比热CPhpj355kJ/kg1.1328密度fhpj355kg/Nm30.5669标况下密度0hkg/Nm31.29510导热系统fhpj355w/m0.05311粘度fhpj355kg/ms0.0000312普兰德数Prh3550.645烟气放热13烟气放热QhVcfhCphpj（t1h-t2h）kw1771.344214导热油吸Qc3%损失与3%损失kw1665.063515导热油入口温度t1c25016导热油密度fcpj275kg/m384917导热油比热CPcpj275kJ/kg2.67518导热油出温t2c设计30019平均油温tfcpj（t1c+t2c）/227520导热系统fcpj2750.068521粘度fhpj275kg/ms0.0000322普兰德数Prh2757.423导热油流量Vcm3/h52.78758924大温差td13025小温差tx3026对数温差tm（td-tx）/ln（td/tx）68.19714427管排数n0设计取用4628管内径d0取用25*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Rewd0/574590.2832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0Nu/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Rewd0/12411.38146传热准则Nuy0.31Re0.6（S1/S2）0.288.64489947管外换热系数yNu/dw/m2C95.8998948污垢系数m2C/w0.00017249钢管热阻R/dw/m2C13833.33350换热系数K1/（1/01/y+1/e+1/R）w/m2C92.72915551传热量QjKFTkw1672.029551传热量计算误差|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/d0w2/2E-0.14Pa61849.3646弯头数Z1227回弯阻力P24w2/2ZPa213491.88油侧总阻力PfP1+P2Pa275341.17烟气侧9横向节距1S1/d210斜向节距（s1-d）/（s2-d）0.54704611阻力系数（3.2+0.66（1.7-）1.5）Re-0.270.315194412烟气侧阻力Py（n2+1）w2/2Pa997.20273