板式换热器选型计算(水水)

1、板式换热器热力计算选型设备名型号输输入入参参数数项项序序号号序序列列名名称称符符号号单单位位值值来来源源/ /公公式式1换热总量QW840000用户提供2热侧进口温度T155用户提供出口温度T237用户提供定性温度T46T=(T1+T2)/2密度1kg/m989.7查焓值表定压比热容Cp1kJ/（kg）4.174查焓值表导热系数1W/(m）0.643查下表流体运动粘度1/s0.5972查下表普兰特数Pr13.85查下表要求压强降(不大于）P1kPa80经验值选取质量流量1kg/h40249.16体积流量L1m/h40.67L1=1/1进出口流速U1m/s1.5经验值选取进出口内径d1mm97.

2、953冷侧进口温度t134用户提供出口温度t245用户提供定性温度t39.5T=(T1+T2)/2密度2kg/m992.2查焓值表定压比热容Cp2kJ/（kg）4.174查焓值表导热系数2W/(m）0.635查表流体运动粘度2/s0.659查表普兰特数Pr24.31查表要求压强降(不大于）P2kPa80经验值选取P1T2)C-(T1Q=1sm/1026-sm/1026-114.3141ULd=质量流量2kg/h65862.26体积流量L2m/h66.38L2=2/2进出口流速U2m/s1.5经验值选取进出口内径d2mm125.142t2)C-(t1Q=2214.3242ULd=3冷侧插值法计算

3、一定温度下的参数参考值5077.5100数值3.552.5491.73注：黄色框内为手动填写内容，其余部分自动计算计计算算过过程程与与结结果果序号序列名称符号单位值1两流体的平均传热温差两侧最高温温差tmax10两侧最底温温差tmin3对数平均温差tm6.5循环水传热单元NTUmin0.461538462修正系数0.985平均传热温差平均传热温差tm6.40252初选换热器型号假设传热系数KW/(）2500换热面积S52.4795002初选板换型号BR0.5换热面积圆整S054热侧程数N11冷侧程数N21单板换热面积A00.5单流道截面积A0.00118当量直径dem0.0076板片厚度om0

4、.00053验证热侧流道数n15454冷侧流道数n25454热侧板间流速u1m/s0.177286228冷侧板间流速u2m/s0.289373773热侧雷诺数Re12256.154269冷侧雷诺数Re23337.23926热侧努塞尔特数Nu173.78584267冷侧努塞尔特数Nu2113.5292118热侧传热系数1W/(）6242.670637冷侧传热系数2W/(）9485.664404污垢热阻R1 R2(）/W0.000043板片导热系数0W/(mK）14.838252初选换热器型号总传热系数KW/(）2595.334492计算表明，应使K大于选择该型号换热器初设值K,则所选板片合格4核

5、算压降流体压缩流道Eu1503.2708592流体扩张流道Eu2339.5027233热侧压强降Kpa15.65508219与P1进行对比，合格为P1冷侧压强降Kpa28.20725455与P2进行对比，合格为P15换热量核算所需换热板片数n108实际换热面积S54换热器实际换热量QW897297.9707换热量裕度%6.821186987换热量裕度按客户要求调节且大于0,1PD,2PD3验证公式T1-t2T2-t1(tmax+tmin)/2tmin/tm查下图tm=tm初选S=Q/(Ktm)按经验取值根据S取整按板片规格计计算算过过程程与与结结果果按板片规格材质304n1=S0/(N1*A0

6、*2)后圆整n2=S0/(N2*A0*2)后圆整 约0.10.4m/s约0.10.4m/sRe1=deu1/1Re2=deu2/21=Nu11/de2=Nu22/de参考下表0=3.787+0.035*(T1+T2+t1+t2)/4+273)erAnwu236001/11 =erAnwu236002/22 =16 4 1.01PrRe349.01 =Nu16 4 1.01PrRe349.01 =Nun=n1+n2S=nAo1-Q/Q)21200111(1alda+=RRK-0.6951107744Re=Eu1-0.8862449329Re=Eu221,1111uEuNPr=D,1PD22,22

7、22uE uNPr=D,2PDMtKSQD=计算表明，应使K大于选择该型号换热器初设值K,则所选板片合格与P1进行对比，合格为P1与P2进行对比，合格为P1换热量裕度按客户要求调节且大于0温度t密度kg/m比热容cpkJ/(kgK)热导率W/(mK)运动黏度m2/s动力黏度Pas普朗特数Pr0999.94.2120.5511.789E-06 0.00178813.671999.94.2100.5531.741E-06 0.001739813.262999.94.2080.5561.692E-06 0.001691612.843999.94.2060.5581.644E-06 0.0016434

8、12.434999.84.2040.5601.596E-06 0.001595212.015999.84.2020.5631.548E-06 0.00154711.606999.84.1990.5651.499E-06 0.001498811.187999.84.1970.5671.451E-06 0.001450610.778999.74.1950.5691.403E-06 0.001402410.359999.74.1930.5721.354E-06 0.00135429.9410999.74.1910.5741.306E-06 0.0013069.5211999.64.1900.5771

9、.276E-06 0.00127589.2712999.44.1890.5791.246E-06 0.00124569.0213999.34.1890.5821.216E-06 0.00121548.7714999.14.1880.5841.186E-06 0.00118528.5215999.04.1870.5871.156E-06 0.0011558.2716998.84.1860.5891.126E-06 0.00112488.0217998.74.1850.5921.096E-06 0.00109467.7718998.54.1850.5941.066E-06 0.00106447.5

10、219998.44.1840.5971.036E-06 0.00103427.2720998.24.1830.5991.006E-06 0.0010047.0221998.04.1820.6019.859E-07 0.000983756.8622997.74.1810.6039.658E-07 0.00096356.7023997.54.1800.6059.457E-07 0.000943256.5424997.24.1790.6079.256E-07 0.0009236.3825997.04.1790.6099.055E-07 0.000902756.2226996.74.1780.6108

11、.854E-07 0.00088256.0627996.54.1770.6128.653E-07 0.000862255.9028996.24.1760.6148.452E-07 0.0008425.7429996.04.1750.6168.251E-07 0.000821755.5830995.74.1740.6188.050E-07 0.00080155.4231995.44.1740.6207.904E-07 0.000786685.3132995.04.1740.6217.758E-07 0.000771865.2033994.74.1740.6237.612E-07 0.000757

12、045.0934994.34.1740.6257.466E-07 0.000742224.9835994.04.1740.6277.320E-07 0.00072744.8736993.64.1740.6287.174E-07 0.000712584.7537993.34.1740.6307.028E-07 0.000697764.6438992.94.1740.6326.882E-07 0.000682944.5339992.64.1740.6336.736E-07 0.000668124.4240992.24.1740.6356.590E-07 0.00065334.3141991.84.

13、1740.6366.487E-07 0.000642914.2342991.44.1740.6386.384E-07 0.000632524.1643991.04.1740.6396.281E-07 0.000622134.0844990.64.1740.6406.178E-07 0.000611744.0045990.24.1740.6426.075E-07 0.000601353.9346989.74.1740.6435.972E-07 0.000590963.8547989.34.1740.6445.869E-07 0.000580573.7748988.94.1740.6455.766

14、E-07 0.000570183.6949988.54.1740.6475.663E-07 0.000559793.6250988.14.1740.6485.560E-07 0.00054943.5451987.64.1750.6495.482E-07 0.000541453.4952987.14.1750.6505.404E-07 0.00053353.4353986.64.1760.6515.326E-07 0.000525553.3854986.14.1760.6525.248E-07 0.00051763.3255985.64.1770.6545.170E-07 0.000509653

15、.2756985.14.1770.6555.092E-07 0.00050173.2157984.64.1780.6565.014E-07 0.000493753.1658984.14.1780.6574.936E-07 0.00048583.1059983.64.1790.6584.858E-07 0.000477853.0560983.14.1790.6594.780E-07 0.00046992.9961982.64.1800.6604.717E-07 0.000463522.9562982.04.1810.6614.654E-07 0.000457142.9063981.54.1810

16、.6624.591E-07 0.000450762.8664981.04.1820.6634.528E-07 0.000444382.8165980.54.1830.6644.465E-07 0.0004382.7766979.94.1840.6644.402E-07 0.000431622.7367979.44.1850.6654.339E-07 0.000425242.6868978.94.1850.6664.276E-07 0.000418862.6469978.34.1860.6674.213E-07 0.000412482.5970977.84.1870.6684.150E-07 0

17、.00040612.5571977.24.1880.6694.100E-07 0.0004012.5272976.64.1890.6694.050E-07 0.00039592.4873976.04.1890.6704.000E-07 0.00039082.4574975.44.1900.6703.950E-07 0.00038572.4175974.84.1910.6713.900E-07 0.00038062.3876974.24.1920.6723.850E-07 0.00037552.3577973.64.1930.6723.800E-07 0.00037042.3178973.04.

18、1930.6733.750E-07 0.00036532.2879972.44.1940.6733.700E-07 0.00036022.2480971.84.1950.6743.650E-07 0.00035512.2181971.24.1960.6753.611E-07 0.000351082.1882970.54.1980.6753.572E-07 0.000347062.1683969.94.1990.6763.533E-07 0.000343042.1384969.24.2000.6763.494E-07 0.000339022.1185968.64.2020.6773.455E-0

19、7 0.0003352.0886967.94.2030.6783.416E-07 0.000330982.0587967.34.2040.6783.377E-07 0.000326962.0388966.64.2050.6793.338E-07 0.000322942.0089966.04.2070.6793.299E-07 0.000318921.9890965.34.2080.6803.260E-07 0.00031491.9591964.64.2090.6803.229E-07 0.000311661.9392963.94.2100.6813.198E-07 0.000308421.91

20、93963.24.2120.6813.167E-07 0.000305181.8994962.54.2130.6813.136E-07 0.000301941.8795961.94.2140.6823.105E-07 0.00029871.8596961.24.2150.6823.074E-07 0.000295461.8397960.54.2160.6823.043E-07 0.000292221.8198959.84.2180.6823.012E-07 0.000288981.7999959.14.2190.6832.981E-07 0.000285741.77100958.44.2200

21、.6832.950E-07 0.00028251.75101957.74.2210.6832.927E-07 0.000280151.74102956.94.2230.6832.904E-07 0.00027781.72103956.24.2240.6842.881E-07 0.000275451.71104955.44.2250.6842.858E-07 0.00027311.69105954.74.2270.6842.835E-07 0.000270751.68106954.04.2280.6842.812E-07 0.00026841.66107953.24.2290.6842.789E

22、-07 0.000266051.65108952.54.2300.6852.766E-07 0.00026371.63109951.74.2320.6852.743E-07 0.000261351.62110951.04.2330.6852.720E-07 0.0002591.60111950.24.2350.6852.700E-07 0.000256841.59112949.44.2360.6852.680E-07 0.000254681.57113948.64.2380.6852.660E-07 0.000252521.56114947.84.2400.6852.640E-07 0.000

23、250361.55115947.14.2420.6862.620E-07 0.00024821.54116946.34.2430.6862.600E-07 0.000246041.52117945.54.2450.6862.580E-07 0.000243881.51118944.74.2470.6862.560E-07 0.000241721.50119943.94.2480.6862.540E-07 0.000239561.48120943.14.2500.6862.520E-07 0.00023741.47121942.34.2520.6862.501E-07 0.000235441.4

24、6122941.44.2530.6862.482E-07 0.000233481.45123940.64.2550.6862.463E-07 0.000231521.44124939.84.2560.6862.444E-07 0.000229561.43125939.04.2580.6862.425E-07 0.00022761.42126938.14.2600.6862.406E-07 0.000225641.40127937.34.2610.6862.387E-07 0.000223681.39128936.54.2630.6862.368E-07 0.000221721.38129935

25、.64.2640.6862.349E-07 0.000219761.37130934.84.2660.6862.330E-07 0.00021781.36131933.94.2680.6862.314E-07 0.000216131.35132933.14.2700.6862.298E-07 0.000214461.34133932.24.2720.6862.282E-07 0.000212791.33134931.34.2740.6862.266E-07 0.000211121.32135930.54.2770.6862.250E-07 0.000209451.31136929.64.279

26、0.6852.234E-07 0.000207781.30137928.74.2810.6852.218E-07 0.000206111.29138927.84.2830.6852.202E-07 0.000204441.28139927.04.2850.6852.186E-07 0.000202771.27140926.14.2870.6852.170E-07 0.00020111.26141925.24.2900.6852.156E-07 0.000199631.25142924.34.2920.6852.142E-07 0.000198161.24143923.44.2950.6852.

27、128E-07 0.000196691.23144922.54.2970.6852.114E-07 0.000195221.22145921.64.3000.6852.100E-07 0.000193751.22146920.64.3030.6842.086E-07 0.000192281.21147919.74.3050.6842.072E-07 0.000190811.20148918.84.3080.6842.058E-07 0.000189341.19149917.94.3100.6842.044E-07 0.000187871.18150917.04.3130.6842.030E-0

28、7 0.00018641.17151916.04.3160.6842.018E-07 0.000185121.16152915.04.3200.6842.006E-07 0.000183841.16153914.04.3230.6841.994E-07 0.000182561.15154913.04.3260.6841.982E-07 0.000181281.14155912.04.3300.6841.970E-07 0.000181.14156911.04.3330.6831.958E-07 0.000178721.13157910.04.3360.6831.946E-07 0.000177

29、441.12158909.04.3390.6831.934E-07 0.000176161.11159908.04.3430.6831.922E-07 0.000174881.11160907.04.3460.6831.910E-07 0.00017361.10161906.04.3490.6831.900E-07 0.000172521.10162905.14.3530.6821.890E-07 0.000171441.09163904.14.3560.6821.880E-07 0.000170361.09164903.14.3600.6811.870E-07 0.000169281.081

30、65902.24.3630.6811.860E-07 0.00016821.08166901.24.3660.6811.850E-07 0.000167121.07167900.24.3700.6801.840E-07 0.000166041.07168899.24.3730.6801.830E-07 0.000164961.06169898.34.3770.6791.820E-07 0.000163881.06170897.34.3800.6791.810E-07 0.00016281.05171896.34.3840.6791.802E-07 0.000161821.05172895.24.3870.6781.794E-07 0.000160841.04173894.24.3910.6781.786E-07 0.000159861.04174893.14.3950.6771.778E-07 0.000158881.03175892.14.3990.6771.770E-07 0.00015791.03176891.14.4020.6761.762E