板式换热器选型计算(水水).xls

设备名型号 序号 序 列 名称符号单位值 1QW840000 进口温度T155 出口温度T237 定性温度T46 密度 1kg/m989.7 定压比热容Cp1kJ/（kg）4.174 导热系数 1W/(m）0.643 流体运动粘度 1/s0.5972 普兰特数3.85 要求压强降(不大于 ） P1kPa80 质量流量 1kg/h40249.16 体积流量L1m/h40.67 进出口流速U1m/s1.5 进出口内径d1mm97.95 进口温度t134 出口温度t245 定性温度t39.5 密度 2kg/m992.2 定压比热容Cp2kJ/（kg）4.174 导热系数 2W/(m）0.635 流体运动粘度 2/s0.659 普兰特数4.31 要求压强降(不大于 ） P2kPa80 Pr2 热 侧 板式换热器热力计算选型 3 冷 侧 输入参数项 输入参数项 换热总量 2 Pr1 sm/10 26 sm/10 26 质量流量 2kg/h65862.26 体积流量L2m/h66.38 进出口流速U2m/s1.5 进出口内径d2mm125.14 5077.5100 3.552.5491.73 注：黄色框内为手动填写内容，其余部分自动计算 插值法计算一定温度下的参数 参考值 数值 来源/公式序号 序 列 名称符号单位 用户提供两侧最高温温差tmax 用户提供两侧最底温温差tmin 用户提供对数平均温差tm“ T=(T1+T2)/2循环水传热单元 查焓值表修正系数 查焓值表平均传热温差 查下表 查下表 查下表 经验值选取 L1= 1/ 1 经验值选取 用户提供 用户提供平均传热温差tm T=(T1+T2)/2假设传热系数KW/(） 查焓值表换热面积S 查焓值表初选板换型号 查表换热面积圆整S0 查表热侧程数N1 查表冷侧程数N2 经验值选取单板换热面积A0 计算过程与结果 计算过程与结果 初 选 换 热 器 型 号 2 1 两 流 体 的 平 均 传 热 温 差 BR0.5 NTUmin P1 T2)C-(T1 Q =1 114.3 14 1 U L d 单流道截面积A L2= 2/ 2当量直径dem 经验值选取板片厚度 om 热侧流道数n154 冷侧流道数n254 热侧板间流速u1m/s 冷侧板间流速u2m/s 热侧雷诺数Re1 冷侧雷诺数Re2 热侧努塞尔特数Nu1 冷侧努塞尔特数Nu2 热侧传热系数 1W/(） 冷侧传热系数 2W/(） 污垢热阻R1 R2(）/W 板片导热系数 0W/(mK） 初 选 换 热 器 型 号 3 验 证 2t2)C-(t1 Q = 2 214.3 24 2 U L d 总传热系数KW/(） 流体压缩流道Eu1 流体扩张流道Eu2 热侧压强降Kpa 冷侧压强降Kpa 所需换热板片数n 实际换热面积S 换热器实际换热量QW 换热量裕度% 与P1进行对比，合格为P1 与P2进行对比，合格为P1 4 核 算 压 降 5 换 热 量 核 算 换热量裕度按客户要求调节且大于0 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 , 1 P , 2 P 值公式 10T1-t2 3T2-t1 6.5(tmax+tmin)/2 0.461538462tmin/tm“ 0.985查下图 6.4025tm= tm“ 2500初选 52.4795002S=Q/(Ktm) 按经验取值 54根据S取整 1 1 0.5按板片规格 计算过程与结果 计算过程与结果 0.00118按板片规格 0.0076 0.0005材质304 54n1=S0/(N1*A0*2)后圆整 54n2=S0/(N2*A0*2)后圆整 0.177286228 约0.10.4m/s 0.289373773约0.10.4m/s 2256.154269 Re1=deu1/ 1 3337.23926 Re2=deu2/ 2 73.78584267 113.5292118 6242.670637 1=Nu1 1/de 9485.664404 2=Nu2 2/de 0.000043参考下表 14.838250=3.787+0.035*(T1+T2+t1+t2)/4+273) An w u 23600 1/1 1 An w u 23600 2/2 2 1 641.0 1 PrRe349.01 Nu 1 641.0 1 PrRe349.01 Nu 2595.334492 503.2708592 339.5027233 15.65508219 28.20725455 108n=n1+n2 54S=nAo 897297.9707 6.8211869871-Q/Q 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 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 ) 2 1 2 0 0 1 1 1 ( 1 RR K -0.695 1 107744Re=Eu1 -0.886 2 449329Re=Eu2 2 1 , 1 111uEuNP , 1 P 2 2 , 2 222uEuNP , 2 P M tKSQ 温度t 密度 kg/m 比热容cp kJ/(kgK) 热导率 W/(mK) 运动黏度 m2/s 动力黏度 Pas 0999.94.2120.5511.789E-06 0.001788 1999.94.2100.5531.741E-06 0.0017398 2999.94.2080.5561.692E-06 0.0016916 3999.94.2060.5581.644E-06 0.0016434 4999.84.2040.5601.596E-06 0.0015952 5999.84.2020.5631.548E-06 0.001547 6999.84.1990.5651.499E-06 0.0014988 7999.84.1970.5671.451E-06 0.0014506 8999.74.1950.5691.403E-06 0.0014024 9999.74.1930.5721.354E-06 0.0013542 10999.74.1910.5741.306E-06 0.001306 11999.64.1900.5771.276E-06 0.0012758 12999.44.1890.5791.246E-06 0.0012456 13999.34.1890.5821.216E-06 0.0012154 14999.14.1880.5841.186E-06 0.0011852 15999.04.1870.5871.156E-06 0.001155 16998.84.1860.5891.126E-06 0.0011248 17998.74.1850.5921.096E-06 0.0010946 18998.54.1850.5941.066E-06 0.0010644 19998.44.1840.5971.036E-06 0.0010342 20998.24.1830.5991.006E-06 0.001004 21998.04.1820.6019.859E-07 0.00098375 22997.74.1810.6039.658E-07 0.0009635 23997.54.1800.6059.457E-07 0.00094325 24997.24.1790.6079.256E-07 0.000923 25997.04.1790.6099.055E-07 0.00090275 26996.74.1780.6108.854E-07 0.0008825 27996.54.1770.6128.653E-07 0.00086225 28996.24.1760.6148.452E-07 0.000842 29996.04.1750.6168.251E-07 0.00082175 30995.74.1740.6188.050E-07 0.0008015 31995.44.1740.6207.904E-07 0.00078668 32995.04.1740.6217.758E-07 0.00077186 33994.74.1740.6237.612E-07 0.00075704 34994.34.1740.6257.466E-07 0.00074222 35994.04.1740.6277.320E-07 0.0007274 36993.64.1740.6287.174E-07 0.00071258 37993.34.1740.6307.028E-07 0.00069776 38992.94.1740.6326.882E-07 0.00068294 39992.64.1740.6336.736E-07 0.00066812 40992.24.1740.6356.590E-07 0.0006533 41991.84.1740.6366.487E-07 0.00064291 42991.44.1740.6386.384E-07 0.00063252 43991.04.1740.6396.281E-07 0.00062213 44990.64.1740.6406.178E-07 0.00061174 45990.24.1740.6426.075E-07 0.00060135 46989.74.1740.6435.972E-07 0.00059096 47989.34.1740.6445.869E-07 0.00058057 48988.94.1740.6455.766E-07 0.00057018 49988.54.1740.6475.663E-07 0.00055979 50988.14.1740.6485.560E-07 0.0005494 51987.64.1750.6495.482E-07 0.00054145 52987.14.1750.6505.404E-07 0.0005335 53986.64.1760.6515.326E-07 0.00052555 54986.14.1760.6525.248E-07 0.0005176 55985.64.1770.6545.170E-07 0.00050965 56985.14.1770.6555.092E-07 0.0005017 57984.64.1780.6565.014E-07 0.00049375 58984.14.1780.6574.936E-07 0.0004858 59983.64.1790.6584.858E-07 0.00047785 60983.14.1790.6594.780E-07 0.0004699 61982.64.1800.6604.717E-07 0.00046352 62982.04.1810.6614.654E-07 0.00045714 63981.54.1810.6624.591E-07 0.00045076 64981.04.1820.6634.528E-07 0.00044438 65980.54.1830.6644.465E-07 0.000438 66979.94.1840.6644.402E-07 0.00043162 67979.44.1850.6654.339E-07 0.00042524 68978.94.1850.6664.276E-07 0.00041886 69978.34.1860.6674.213E-07 0.00041248 70977.84.1870.6684.150E-07 0.0004061 71977.24.1880.6694.100E-07 0.000401 72976.64.1890.6694.050E-07 0.0003959 73976.04.1890.6704.000E-07 0.0003908 74975.44.1900.6703.950E-07 0.0003857 75974.84.1910.6713.900E-07 0.0003806 76974.24.1920.6723.850E-07 0.0003755 77973.64.1930.6723.800E-07 0.0003704 78973.04.1930.6733.750E-07 0.0003653 79972.44.1940.6733.700E-07 0.0003602 80971.84.1950.6743.650E-07 0.0003551 81971.24.1960.6753.611E-07 0.00035108 82970.54.1980.6753.572E-07 0.00034706 83969.94.1990.6763.533E-07 0.00034304 84969.24.2000.6763.494E-07 0.00033902 85968.64.2020.6773.455E-07 0.000335 86967.94.2030.6783.416E-07 0.00033098 87967.34.2040.6783.377E-07 0.00032696 88966.64.2050.6793.338E-07 0.00032294 89966.04.2070.6793.299E-07 0.00031892 90965.34.2080.6803.260E-07 0.0003149 91964.64.2090.6803.229E-07 0.00031166 92963.94.2100.6813.198E-07 0.00030842 93963.24.2120.6813.167E-07 0.00030518 94962.54.2130.6813.136E-07 0.00030194 95961.94.2140.6823.105E-07 0.0002987 96961.24.2150.6823.074E-07 0.00029546 97960.54.2160.6823.043E-07 0.00029222 98959.84.2180.6823.012E-07 0.00028898 99959.14.2190.6832.981E-07 0.00028574 100958.44.2200.6832.950E-07 0.0002825 101957.74.2210.6832.927E-07 0.00028015 102956.94.2230.6832.904E-07 0.0002778 103956.24.2240.6842.881E-07 0.00027545 104955.44.2250.6842.858E-07 0.0002731 105954.74.2270.6842.835E-07 0.00027075 106954.04.2280.6842.812E-07 0.0002684 107953.24.2290.6842.789E-07 0.00026605 108952.54.2300.6852.766E-07 0.0002637 109951.74.2320.6852.743E-07 0.00026135 110951.04.2330.6852.720E-07 0.000259 111950.24.2350.6852.700E-07 0.00025684 112949.44.2360.6852.680E-07 0.00025468 113948.64.2380.6852.660E-07 0.00025252 114947.84.2400.6852.640E-07 0.00025036 115947.14.2420.6862.620E-07 0.0002482 116946.34.2430.6862.600E-07 0.00024604 117945.54.2450.6862.580E-07 0.00024388 118944.74.2470.6862.560E-07 0.00024172 119943.94.2480.6862.540E-07 0.00023956 120943.14.2500.6862.520E-07 0.0002374 121942.34.2520.6862.501E-07 0.00023544 122941.44.2530.6862.482E-07 0.00023348 123940.64.2550.6862.463E-07 0.00023152 124939.84.2560.6862.444E-07 0.00022956 125939.04.2580.6862.425E-07 0.0002276 126938.14.2600.6862.406E-07 0.00022564 127937.34.2610.6862.387E-07 0.00022368 128936.54.2630.6862.368E-07 0.00022172 129935.64.2640.6862.349E-07 0.00021976 130934.84.2660.6862.330E-07 0.0002178 131933.94.2680.6862.314E-07 0.00021613 132933.14.2700.6862.298E-07 0.00021446 133932.24.2720.6862.282E-07 0.00021279 134931.34.2740.6862.266E-07 0.00021112 135930.54.2770.6862.250E-07 0.00020945 136929.64.2790.6852.234E-07 0.00020778 137928.74.2810.6852.218E-07 0.00020611 138927.84.2830.6852.202E-07 0.00020444 139927.04.2850.6852.186E-07 0.00020277 140926.14.2870.6852.170E-07 0.0002011 141925.24.2900.6852.156E-07 0.00019963 142924.34.2920.6852.142E-07 0.00019816 143923.44.2950.6852.128E-07 0.00019669 144922.54.2970.6852.114E-07 0.00019522 145921.64.3000.6852.100E-07 0.00019375 146920.64.3030.6842.086E-07 0.00019228 147919.74.3050.6842.072E-07 0.00019081 148918.84.3080.6842.058E-07 0.00018934 149917.94.3100.6842.044E-07 0.00018787 150917.04.3130.6842.030E-07 0.0001864 151916.04.3160.6842.018E-07 0.00018512 152915.04.3200.6842.006E-07 0.00018384 153914.04.3230.6841.994E-07 0.00018256 154913.04.3260.6841.982E-07 0.00018128 155912.04.3300.6841.970E-07 0.00018 156911.04.3330.6831.958E-07 0.00017872 157910.04.3360.6831.946E-07 0.00017744 158909.04.3390.6831.934E-07 0.00017616 159908.04.3430.6831.922E-07 0.00017488 160907.04.3460.6831.910E-07 0.0001736 161906.04.3490.6831.900E-07 0.00017252 162905.14.3530.6821.890E-07 0.00017144 163904.14.3560.6821.880E-07 0.00017036 164903.14.3600.6811.870E-07 0.00016928 165902.24.3630.6811.860E-07 0.0001682 166901.24.3660.6811.850E-07 0.00016712 167900.24.3700.6801.840E-07 0.00016604 168899.24.3730.6801.830E-07 0.00016496 169898.34.3770.6791.820E-07 0.00016388 170897.34.3800.6791.810E-07 0.0001628 171896.34.3840.6791.802E-07 0.00016182 172895.24.3870.6781.794E-07 0.00016084 173894.24.3910.6781.786E-07 0.00015986 174893.14.3950.6771.778E-07 0.00015888 175892.14.3990.6771.770E-07 0.0001579 176891.14.4020.6761.762E-07 0.00015692 177890.04.4060.6761.754E-07 0.00015594 178889.04.4100.6751.746E-07 0.00015496 179887.94.4130.6751.738E-07 0.00015398 180886.94.4170.6741.730E-07 0.000153 181885.84.4210.6741.722E-07 0.00015212 182884.74.4250.6731.714E-07 0.00015124 183883.64.4300.6731.706E-07 0.00015036 184882.54.4340.6721.698E-07 0.00014948 185881.54.4380.6721.690E-07 0.0001486 186880.44.4420.6721.682E-07 0.00014772 187879.34.4460.6711.674E-07 0.00014684 188878.24.4510.6711.666E-07 0.00014596 189877.14.4550.6701.658E-07 0.00014508 190876.04.4590.6701.650E-07 0.0001442 191874.74.4640.6691.643E-07 0.00014342 192873.44.4680.6691.636E-07 0.00014264 193872.14.4730.6681.629E-07 0.00014186 194870.84.4770.6671.622E-07 0.00014108 195869.54.4820.6671.615E-07 0.0001403 196868.24.4870.6661.608E-07 0.00013952 197866.94.4910.6651.601E-07 0.00013874 198865.64.4960.6641.594E-07 0.00013796 199864.34.5