0yita0.2C1.00E-05s2/m2Jmax1.15E+01deltamax1.46E-03m1.46E+00mm磨损量貌似有点大,对于10m/s的速度来说,还需继续验证相变换热器下段管外径32mm0.032m管壁厚3mm0.003m管长1130mm1.13m翅片高16mm0.016m翅片厚1.2mm0.0012m翅片中心间距10mm0.01m下段烟道收窄,使长1000mm1m则烟道面积1.3换热器迎风面上流速2.212179487Nm/s3.57352071m/s若要使最窄截面上的流速达到7m/s,则阻断系数φ0.489497041翅片外径64mm0.064m热管横向中心距s173.21801148mm0.073218011ms1取值74mm0.074m第一排管子数(列数)21.62162162取值22阻断面积0.8909824m2实际阻断系数0.4928实际流速w7.045584996m/s4.361552617Nm/s烟气在管束中的流动Re8.02E+03Prf6.90E-01at441K168℃Prw0.7at398K125℃假设值s264mm0.064m假设值s2/ds1/s21.15625Nuf5.31E+01α5.62E+01W/m2KFb0.099967992m2Ff0.572543951m2Fw0.11359999m2Q235钢导热系数45W/mKAL0.00001992H`0.0166x5.36E-01r2`0.0646r2`/r1yitaf0.8查图(传热学)αa276.2426821W/m2K翅片接触热阻忽略污垢热阻0.258m2K/kW0.000258m2K/W蒸发热阻0.258m2K/kW0.000258m2K/W蒸发段传热系数Ka241.7791816W/m2K传热面积21.7174839m2总管数191.1750506取值194排数9
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