板式换热器换热面积计算方法

1、逆流对数平均温差公式t=(T1-t2)-(T2-t1)/LN(T1-t2)/(T2-t1)并流对数平均温差公式t=(T1-t1)-(T2-t2)/LN(T1-t1)/(T2-t2)逆流对数平均温差计算T1T2t1t2t逆流对数平均温差计算T1计算结果10060303545.2670240热量公式Q=Cp*M*t蒸汽热量公式Q=r*M(表压4Kg/cm2)热量计算Cp(Kcal/Kg.C)M(Kg)t(C) Q(Kcal)热量计算r(Kcal/Kg)计算结果0.459180045.26702 37399.61计算结果505换热面积公式A=Q/(K*t)换热面积公式A=Q/(K*t)面积计算Q(K

2、cal)K(Kcal/m2.h.C)t(C)A(m2)面积计算 Q(Kcal)计算结果37399.6180045.26702 1.03275计算结果505000冷却水量M=Q/(Cp*t)冷却水量M=Q/(Cp*t)水量计算Q(Kcal)Cp(Kcal/Kg.Ct(C)M(Kg)水量计算 Q(Kcal)计算结果37399.61157479.922计算结果505000算数平均温差公式t=(T1-t2)-(T2-t1)/2T2t1t2t逆流算数平均温差公式T1T2t1t23051026.80414030510M(Kg)Q(Kcal)1000505000K(Kcal/m2.h.C)t(C)A(m2)

3、80045.26702 13.94503Cp(Kcal/Kg.Ct(C)M(Kg)15101000t=(T1-t1)-(T2-t2)/LN(T1-t1)/(T2-t2)Q=r*M(表压4Kg/cm2)A=Q/(K*t)M=Q/(Cp*t)t27.5t=(T1-t2)-(T2-t1)/2据据生生产产经经验验可可知知，传传热热系系数数大大致致范范围围如如下下： 换热器的K值范围管 内管 间K（W/.C)气体气体1035水气体1060水 水 8001750水 水蒸汽11004000水溶液（210-3pa.s)水蒸汽5802800在制盐蒸发中，加热室均为管间水蒸汽，管内水溶液，K值一般在1400250

4、0（W/.C）。对对不不同同管管材材，其其K K值值选选用用范范围围如如下下：不不同同材材料料的的K K值值材料 K值（W/.C)123碳钢200018001600铜管250021001800铜镍合金250021001800不锈钢 200018001600钛管250021001800K(W/m2.C)8.630.18.651.668.8150594634409463440498.8240812042150414001500150014001500据据生生产产经经验验可可知知，传传热热系系数数大大致致范范围围如如下下： 换热器的K值范围K（W/.C)10351060800175011004000

5、110040005802800在制盐蒸发中，加热室均为管间水蒸汽，管内水溶液，K值一般在14002500（W/.C）。对对不不同同管管材材，其其K K值值选选用用范范围围如如下下：不不同同材材料料的的K K值值K值（W/.C)压压力力单单位位换换算算牛顿/米2 （N/)或帕斯卡（Pa）巴（bar) 公斤/厘米2（kg/c)或工程大气压（at）磅/英寸2（1b/in2）大气压 （atm） （标准大气压） 110-5.1.0210-51.4510-49.86910-6105.11.0214.50.98699.8071040.9807114.220.96786.8951036.89510-27.03

6、110-216.80510-21.0131051.0131.03314.711.3331021.33310-31.3610-31.93410-21.31610-33.3861033.38610-23.45310-20.49123.34210-29.7989.79810-59.99110-51.42110-39.6710-52.4891022.48910-32.53810-33.60910-22.45610-31达因/厘米2（dyn/c)=1巴利（barye)=1微巴（wbar)=10-6巴（bar)1毫米水柱（mmH2O)(4)=1公斤/米2（kg/m2)1毫米汞柱（mmH2O)(0)= 1乇

7、（torr)1磅达/英尺2（pdl/ft2)=1.488牛顿/米2（N/）传传热热系系数数单单位位换换算算焦耳/米2.秒.KJ/(.S.K)或瓦/米2.KW/(.K)千卡/米2.时.kcal(.h.)卡/厘米2.秒cal/(c.s.)英热单位/英尺2.时.。FBtu/(ft2h.。F 10.85982.38810-50.17611.16212.77810-50.20484.1871043.6104173735.6784.8821.35610-41扩扩散散系系数数单单位位换换算算厘米/2秒（/s）米2/时（/h）英尺2/时（ft2/h)英尺2/秒in2/s10.363.8750.1552.778

8、110.760.43060.25810.092910.046.4522.323251表表面面张张力力单单位位换换算算达因/厘米（dyn/cm)克/厘米(g/cm)公斤/米（kg/m)磅/英尺(lb/ft)11.0210-31.0210-46.85410-5980.710.16.7210-298071010.6721459214.881.4881温温度度换换算算公公式式摄氏度华氏度兰金/度。R开尔文K9/5+329/5+491.67+273.15 5/9(-32)+459.675/9(+459.67)5/9(。R-491.67)。R-459.67。R5/9。RK-273.159/5K-459.6

9、79/5KK功功、能能和和热热量量单单位位换换算算焦耳（J）公斤.米（kg.m)米制马力.时（PS.b）米制马力.时（HP.b）千瓦.时（kw.h)10.1023.77710-73.72510-72.77810-79.80713.70410-63.65310-62.72410-62.6481062.710510.98630.73552.6851062.7381051.01410.74573.61063.6711051.361.34114187426.91.58110-31.55910-31.16310-31055107.63.98510-43.9310-42.9310-41.3560.1383

10、5.12110-75.0510-73.76810-7体体积积流流率率单单位位换换算算米3/时（m3/h)米3/分（m3/min)米3/秒（m3/s)英尺3/时（ft3/h)英尺3/秒（ft3/s)11.66710-22.77810-435.319.8110-36011.66710-32.1191030.58863.61036011.27110535.312.83610-24.7210-47.86610-612.77810-41.0191021.6992.83210-23.610310.27284.54610-37.57710-59.6322.67610-30.22713.78510-36.30

11、910-58.0212.22810-3重重量量和和质质量量流流率率单单位位换换算算公斤/秒（kg/s)公斤/时（kg/h)磅/秒(lb/s)磅/时（lb/h) 吨/日（t/d)13.61032.2057.93710386.42.77810-416.12410-42.2052.410-20.45361.63310313.610339.191.2610-40.45362.77810-411.08910-21.15710-241.670.0255291.8613.47210-50.1257.65610-50.2756310-3动动力力粘粘度度单单位位换换算算公斤.秒/米2（kg.s/)牛顿.秒/米2

12、（N.s/)或帕.秒（Pa.s)泊（P）或克/（厘米.秒）g/(cm.s)厘 泊（cP）磅.秒/英尺2（lb.s/ft2)19.8198.19.811030.2050.102110 103.20.910-31.0210-20.11 10 220.910-41.0210-4 10-3 10-2120.910-54.8847.88478.84.78810411达因.秒/厘米2（dyn.s/c)=1泊（P）；1牛顿.秒/米2（N.s/）=1公斤（质）/米.秒kgm/(m.s)=3600公斤（质）/米.时kgm/(m.h)运运动动粘粘度度单单位位换换算算厘米/2秒（/s）或沲（St)米2/秒（/s)米

13、3/时（/h)英尺2/秒（ft2/s)英尺2/时（ft2/h)1 10-40.361.07610-33.875 104.13.610310.763.8751042.7782.77810-412.9910-310.769299.2910-23.34610213.61030.2582.5810-59.2910-22.7810-411厘沲（cst)=10-2沲（st）功功率率单单位位换换算算瓦 （W）千 瓦（KW）米制马力（PS）英制马力（HP）公斤.米/秒 （kg.m/s)1 10-3 1.3610-31.34110-30.10210 3 11.361.341102735.50.735510.98

14、6375745.70.74571.014176.049.8079.80710-31.33310-21.31510-2141874.1875.6925.614426.910551.0551.4341.415107.61.3561.35610-31.84310-31.8210-30.1383毫米汞柱（0）（mmHg) 英寸汞柱（0）（inHg) 毫米水柱（15） （mmH2O)英寸水柱（15）（inH2O 7.50110-32.95310-40.10214.01810-3750.129.531.021104401.8735.628.961.001104394.151.712.0367.037102

15、27.776029.921.034104407.213.93710-213.610.535725.413.45610213.617.34910-22.89310-313.93710-21.8677.34910-225.41压压力力单单位位换换算算1达因/厘米2（dyn/c)=1巴利（barye)=1微巴（wbar)=10-6巴（bar)1毫米水柱（mmH2O)(4)=1公斤/米2（kg/m2)1毫米汞柱（mmH2O)(0)= 1乇（torr)1磅达/英尺2（pdl/ft2)=1.488牛顿/米2（N/）千卡（kcal）英热单位（Btu）英尺.磅（ft.lb)2.38910-49.47810-4

16、0.73762.34210-39.29510-37.233632.525101.953106641.22544.41.98106859.834122.65510613.9683.0871030.2521778.23.2410-41.28510-31应加仑/分（Imp.gal/min)美加仑/分 （U.S.gal/min)3.6674.4032.19981022.6421021.421041.5851040.10380.12473.7371024.48810211.2010.83271功功、能能和和热热量量单单位位换换算算体体积积流流率率单单位位换换算算重重量量和和质质量量流流率率单单位位换换算

17、算吨/年（8000小时） （t/a)2.8810481.3061043.6293.3331021千卡/秒（kcal/s)英热单位/秒（Btu/s）英尺.磅 /秒（ft.lb/s)2.3910-49.47810-40.73760.2390.9478737.60.17570.6972542.50.17810.7068550功功率率单单位位换换算算2.34210-39.29510-37.23313.96830870.2521778.23.2410-41.28510-31 压压力力、应应力力（SI）帕斯卡paN/ m-1.kg.s-2达因/平方厘米dyn/c公斤（力）/平方厘米（工程大气压 kg(f)

18、/c大气压（标准大气压）atm磅（力）/平方英尺ld(f)/ft21101.019720E-059.869230E-062.088530E-021.00E-0111.02E-069.8690E-072.08853E-039.806650E+049.806650E+0510.967841020481.013250E+051.013250E+061.033231211747.8803478.8034.882000E-044.725000E-041 6.894760E+036.894760E+047.030690E-026.804600E-021441.333220E+021.333220E+031

19、.360000E-031.316000E-032.78453.38639E+033.38639E+044.45300E-023.34200E-027.07267E+019.79100E+039.79100E+041.00000E-019.67700E-022.04600E+022.48840E+022.48840E+032.53800E-032.45600E-035.19800E+001.00000E+051.00000E+061.01972E+059.86923E-012.08985E+03能能、功功、热热量量（SI)焦耳（J）N.m.kg.s-2公斤（力）-米kg(f).m英尺-磅（力）f

20、t.lb(f)千瓦-时kw.h马力（英）-时hp.h11.01972E-017.37600E-012.77778E-073.72506E-079.8066517.23300E+002.72400E-063.65300E-061.3561.38300E-0113.76600E-075.05100E-073.60000E+063.67100E+052.65500E+0611.34100E+002.68500E+062.73700E+051.98000E+067.45700E-0111.01300E+021.03300E+017.47400E+012.81500E-053.77500E-054.18

21、680E+034.26900E+023.08800E+031.16300E-031.56000E-031.05480E+031.07600E+027.78200E+022.93100E-043.93000E-041.89860E+031.93700E+021.40100E+035.27600E-047.07400E-041.00000E-071.01972E-087.37600E-082.77800E-143.72500E-14磅（力）/平方英寸ld(f)/ft2汞柱（0）水柱（15.5）毫米（Torr) mmHg英寸inHg米mH2O英寸inH2O1.450380E-047.500620E-

22、032.953E-041.021340E-044.019430E-031.45000E-057.50062E-042.95300E-051.02134E-054.019430E-0414.2234735.628.9610.01394.114.69676029.9210.34407.16.944000E-030.3591311.413900E-024.887000E-030.1924151.712.0360.703627.71.934000E-0213.937010E-021.361000E-020.53584.91200E-012.54000E+011.00000E+003.45600E-011.36100E+011.42200E+007.34300E+012.89300E+001.00000E+003.93700E+013.61000E-021.86600E+007.36000E-022.54000E-021.