AD2000-薄管板换热器强度计算示例.docVIP

Component: Front Tubesheet AD-Merkblatt B 5 - Unstayed and Stayed Flat Ends and Plates - January 1995 6.7.1 Circular Flat Plates Mutually Stayed by the Tubes and the Shell Tubesheet Material: 1.4404 X 2 CrNiMo 17 13 2 Blech Tube Material: 1.4404 X 2 CrNiMo 17 13 2 Shell Material: 1.4301 X 5 CrNi 8 10 Blech Condition: Operating Testing Temperature T = 30 20 C Strenth Value, Tubesheet K = 220.2 221.8 N/mm2 Strength Value, Tubes K = 222.3 225 N/mm2 Safety Factor S = 1.5 1.1 Modulus of Elasticity, Shell E = 198725 - N/mm2 Modulus of Elasticity, Tubes E = 198200 - N/mm2 Geometric Data Actual Thickness of Tubesheet se = 23.8 mm Shell Outside Diam. Da = 1404 mm Shell Wall Thickness se = 2 mm Tube Outside Diam. da = 25 mm Tube Wall Thickness se = 2 mm Tube Inside Diam. di = 21 mm Tube Pitch t = 32 mm Design Diameter D1 = 1408 mm Design Diameter d2 = 281.6 mm Number of Tubes n = 1526 Component: Front Tubesheet AD-Merkblatt B 5 - Unstayed and Stayed Flat Ends and Plates - January 1995 Boundry Tubes (approx. the two outermost tube rows) nt = 2*PI(Da-2*se-2*t)/t = 263 Cross-sectional Area, Shell AM = PI*(Da**2-(Da-2*se)**2)/4 = 8809 mm2 Cross-sectional Area, nt AR = nt*PI*(da**2-(da-2*st)**2)/4 = 38007.1 mm2 AD S 3/7 - Allowing For Thermal Stresses in Heat Exchangers - October 1991 Shell Tubes Thermal Expansion Coef. (*10**6 1/deg. C) alpha = 16 16.5 Temperature, C theta = 30 20 Thermal Expansion Difference, xd xd = |(alphaM*(thetaM-20)-alphaR*(thetaR-20))/10**6| = 0.00016 Thermal Stress in Shell sM = -xd /((1/EM)+AM/(AR*ER))*F = -258 bar Thermal Stress in Tu