heat exchanger analysis.xls

Sheet1Crude Heat Exchanger AnalysisCrudeProductBritishSIBritishSIConversion Table1 xMass Flow Ratea30,000 lb/hr3.78E+00Kg/s3.23E+00Kg/slbkg0.4536Densityb51.5 lb/ft38.25E+02Kg/m354.1 lb/ft38.66E+02Kg/m3Volume Flow Rateca/(b*3600)582.5 ft3/hr4.58E-03m3/sec3.73E-03m3/secftm0.3048Initial Tempd70 F2.11E+01C295 F1.46E+02CFinal Tempe136 F5.78E+01C225 F1.07E+02CFC0.5556Temp Deltaf66 F3.67E+01K(-70) F-3.89E+01KHeat Capacityg0.475 BTU/lb.F1.99E+00KJ/(kg.K)0.525 BTU/lb.F2.20E+00KJ/(kg.K)BTUKJ1.0550Viscosity (Dynamic)h2.9 mPa.s2.90E-03Kg/(m.s)5.2 mPa.s5.20E-03Kg/(m.s)Viscosity (Kinematic)ih/b3.52E-06m2/s6.00E-06m2/smPa.sKg/(m.s)0.0010Thermal Conductivityj0.0789 BTU/ft.h.F1.37E-04KJ/(m.s.K)0.069 BTU/ft.h.F1.19E-04KJ/(m.s.K)Pa.sPoise10.0000Heat Transferred Inka*f*g2.76E+02KJ/snaKJ/s(Pascal-sec)Kg/(m.s)1.0000Heat Transferred OutlnanaKJ/s-2.76E+02KJ/smPa.sKg/(m.s)0.0010Number of tubesm324 Tubes3.24E+02Number of tubes per passnm/2162 tubes1.62E+02Tube Wall ThicknessoBWG 14 = 0.083"2.10E-03mTube Lengthp12 ft3.66E+00mTube ODq3/4 in1.91E-02mTube IDrq-2*o1.49E-02mTube Cross Section Areas1.74E-04m2Total Tube Flow Area (per pass)ts*n2.83E-02m2Shell Diau23 1/4 in5.91E-01mGross Cross Section Areav2.74E-01m2Tube Total Outer Cross Sectionw9.28E-02m2Net Flow Cross Section In Shellxv-w1.81E-01m2Flow Velocity in Tubeyc/t1.62E-01m/sReynold Number in Tubez(y*r)/i6.86E+02Tube Thermal Conductivityat 25 C1.60E-02KJ/m.s.K(Assume Stainless Steel)aaat 125 C1.70E-02KJ/m.s.KHeat Transfer Area of Tubeabpi*q*p*m7.12E+01m2Ave Temp of Crudeac(d+e)/23.95E+01CAve Temp of Bottom Productad(d'+e')/21.27E+02CMean Temperature Deltaaeac-ad8.75E+01KTemp Gradient in Tube Radial Directionafae/o4.17E+04K/mHeat Exchanger Capacityagaa*ab*af5.05E+04KJ/s

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