2021年新版化工原理习题答案(05)第五章传热过程基础.pdf

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1、第五章传热过程基础1用平板法测定固体的导热系数，在平板一侧用电热器加热，另一侧用冷却器冷却，同时在板两侧用热电偶测量其表面温度，若所测固体的表面积为0.02 m2，厚度为 0.02 m，实验测得电流表读数为0.5 A，伏特表读数为100 V，两侧表面温度分别为200 和 50，试求该材料的导热系数。解：传热达稳态后电热器的加热速率应与固体的散热（导热）速率相等，即LttSQ21式中W50W1005.0IVQm02.0C50C200m02.0212LttS，将上述数据代入，可得CmW333.0CmW5020002.002.05021ttSQL2某平壁燃烧炉由一层400 mm 厚的耐火砖和一层20

2、0 mm 厚的绝缘砖砌成，操作稳定后，测得炉的内表面温度为1500，外表面温度为100，试求导热的热通量及两砖间的界面温度。设两砖接触良好，已知耐火砖的导热系数为10.80.0006t，绝缘砖的导热系数为20.30.0003t，W/(mC)。两式中的t 可分别取为各层材料的平均温度。解：此为两层平壁的热传导问题，稳态导热时，通过各层平壁截面的传热速率相等，即QQQ21（5-32）或23221211bttSbttSQ（5-32a）式中115000.80.00060.80.00061.250.00032ttt21000.30.00030.30.00030.3150.000152ttt代入 1、2得

3、2.0100)00015.0315.0(4.01500)0003.025.1(tttt解之得C9772ttCmW543.1CmW9770003.025.10003.025.11t则22111mW2017mW4.09771500543.1bttSQ3外径为 159 mm 的钢管，其外依次包扎A、B 两层保温材料，A 层保温材料的厚度为50 mm，导热系数为W/(m )，B 层保温材料的厚度为100 mm，导热系数为W/(m)，设 A精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 1 页，共 13 页的内层温度和B的外层温度分别为170 和 40，试求每米管长的热损失；若将两层材

4、料互换并假设温度不变，每米管长的热损失又为多少解：mW150mW100159100502159ln0.11159502159ln1.014017014.32ln21ln2123212121rrrrttLQA、B 两层互换位置后，热损失为mW5.131mW100159100502159ln1.01159502159ln0.114017014.32ln21ln2123212121rrrrttLQ4直径为57mm3.5mm 的钢管用40 mm 厚的软木包扎，其外又包扎100 mm 厚的保温灰作为绝热层。现测得钢管外壁面温度为120，绝热层外表面温度为10。软木和保温灰的导热系数分别为0.043W/(

5、m)和0.07W/(m)，试求每米管长的冷损失量。解：此为两层圆筒壁的热传导问题，则mW53.24mW04.00285.01.004.00285.0ln07.010285.004.00285.0ln043.011012014.32ln1ln1223212121rrrrttLQ5在某管壳式换热器中用冷水冷却热空气。换热管为 25 mm 2.5 mm 的钢管，其导热系数为 45 W/(m)。冷却水在管程流动，其对流传热系数为2 600 W/(m2)，热空气在壳程流动，其对流传热系数为52 W/(m2)。试求基于管外表面积的总传热系数K，以及各分热阻占总热阻的百分数。设污垢热阻可忽略。解：由oooo

6、mii11Kddbdd查得钢的导热系数CmW4522.5bmm o25dmm mm20mm5.2225idmm5.22mm22025mdCmW6.50CmW02.02600025.00225.045025.00025.0521122oK壳程对流传热热阻占总热阻的百分数为oooo150.6100%100%100%97.3%152KK精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 2 页，共 13 页文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:

7、CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码

8、:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编

9、码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档

10、编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文

11、档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8

12、文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D

13、8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8管程对流传热热阻占总热阻的百分数为oooiiiio50.60.025100%100%100%2.4%126000.02dK dddK管壁热阻占总热阻的百分数为ooommo0.00250.02550.6100%100%100%0.3%1450.0225bd

14、bd KddK6在一传热面积为40 m2的平板式换热器中，用水冷却某种溶液，两流体呈逆流流动。冷却水的流量为30 000kg/h，其温度由22 升高到 36。溶液温度由115 降至 55。若换热器清洗后，在冷、热流体流量和进口温度不变的情况下，冷却水的出口温度升至40 ，试估算换热器在清洗前壁面两侧的总污垢热阻。假设：（1）两种情况下，冷、热流体的物性可视为不变，水的平均比热容为kJ/(kg)；（2）两种情况下，io、分别相同；（3）忽略壁面热阻和热损失。解：求清洗前总传热系数KC7.52C225536115ln225536115mtCmW231CmW7.52403600223610174.4

15、30000223mtSQK求清洗后传热系数K由热量衡算hp,h12cp,c21()()W CTTWCtthp,h12cp,c21()()W CTTWCttcp,c2121hp,h()WCTTttWCC9.37C22402236551151151212211ttttTTTC1.38C229.3740115ln229.3740115mtCmW8.410CmW1.38403600224010174.430000223K清洗前两侧的总传热热阻WCm109.1WCm8.4101231111232SKKR7在一传热面积为25 m2的单程管壳式换热器中，用水冷却某种有机溶液。冷却水的流量为28 000kg/

16、h，其温度由 25 升至 38 ，平均比热容为kJ/(kg)。有机溶液的温度由110 降至 65 ，平均比热容为kJ/(kg)。两流体在换热器中呈逆流流动。设换热器的热损失可忽略，试核算该换热器的总传热系数并计算该有机溶液的处理量。解：p,c4.17CkJ/(kg)cp,c21()QW CttW1022.4W25381017.436002800053求mt精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 3 页，共 13 页文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9

17、A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX

18、9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 Z

19、X9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8

20、ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8

21、 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S

22、8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10

23、S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8有机物110 65水38 25 t72 40C4.54C4072ln4072mtCmW3.310CmW4.54251022.4225Khkg10963.1skg452.5skg651101072.11022.443521hhKT

24、TcQWp8在一单程管壳式换热器中，用水冷却某种有机溶剂。冷却水的流量为10 000 kg/h，其初始温度为 30，平均比热容为kJ/（kg）。有机溶剂的流量为14 000 kg/h，温度由 180 降至 120，平均比热容为kJ/（kg）。设换热器的总传热系数为500 W/(m2)，试分别计算逆流和并流时换热器所需的传热面积，设换热器的热损失和污垢热阻可以忽略。解：kW3.401hkJ104448.1hkJ12018072.114000621hTTWcQp冷却水的出口温度为C61.64C30174.410000104448.161cc2tcWQtp逆流时C102.2C9039.115ln39

25、.25C3012061.64180ln3012061.64180mt223mm854.7m2.102500103.401tKQS逆并流时C97.94C15039.55ln61.94C3018061.64120ln3018061.64120mt223mm452.8m97.94500103.401tKQS逆9在一单程管壳式换热器中，用冷水将常压下的纯苯蒸汽冷凝成饱和液体。已知苯蒸汽的体积流量为1 600 m3/h，常压下苯的沸点为80.1，气化热为 394 kJ/kg。冷却水的入口温度为20，流量为 35 000 kg/h，水的平均比热容为kJ/(kg )。总传热系数为450 W/(m2)。设换热

26、器的热损失可忽略，试计算所需的传热面积。解：苯蒸气的密度为33mkg692.2mkg1.8027308206.0781RTPMhkg2.4307hkg692.21600hWW1071.4hkJ10697.1hkJ3942.430756hWQcp,c21()QW Ctt235350004.17 10(20)4.71 103600t解出231.6t求mt苯 精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 4 页，共 13 页文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A

27、4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9

28、A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX

29、9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 Z

30、X9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8

31、ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8

32、 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S

33、8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8水20 tC1.54C5.481.60ln5.481.60mt225mm3.19m1.544501071.4tKQS10在一单壳程、双管程的管壳式换热器中，水在壳程内流动，进口温度为30，出口温度为 65。油在管程流动，进口温度为

34、120。出口温度为 75，试求其传热平均温度差。解：先求逆流时平均温度差油120 75水65 30t55 45C8.49C4555ln4555ln1212mttttt计算 P及R211165300.38912030ttPTt1221120751.2866530TTRtt查图 5-11（a）得t0.875C6.43C8.49875.0mtmtt11某生产过程中需用冷却水将油从105 冷却至 70。已知油的流量为6 000 kg/h，水的初温为 22，流量为 2 000 kg/h。现有一传热面积为10 m2的套管式换热器，问在下列两种流动型式下，换热器能否满足要求：（1）两流体呈逆流流动；（2）两

35、流体呈并流流动。设换热器的总传热系数在两种情况下相同，为300 W/(m2)；油的平均比热容为kJ/(kg)，水的平均比热容为kJ/(kg)。热损失可忽略。解：本题采用NTU 法计算（1）逆流时CW7.3166CW109.2360060003hhpcWCW7.2316CW1017.4360020003ccpcWminRmax2316.70.7323166.7CCCminmin30010()1.2952316.7KSNTUC查图得0.622min11()QCTtW10196.1W221057.2316622.05精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 5 页，共 13

36、页文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7

37、D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H

38、7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3

39、H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V

40、3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4

41、V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A

42、4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8C70C2.67C7.316610196.11055hh12pcWQT

43、T能满足要求（2）并流时R0.732Cmin()1.295NTU查图得0.526W10011.1W221057.2316526.05QC70C1.73C7.316610011.110552T不能满足要求12在一单程管壳式换热器中，管外热水被管内冷水所冷却。已知换热器的传热面积为5 m2，总传热系数为1 400 W/(m2)；热水的初温为100，流量为 5 000 kg/h；冷水的初温为20，流量为 10 000 kg/h。试计算热水和冷水的出口温度及传热量。设水的平均比热容为kJ/(kg)，热损失可忽略不计。解：CW5806CW1018.4360050003hhpcWCW11611CW1018

44、.43600100003ccpcW5.0116116.5805maxminRCCCminmin1400 5()1.215805.6KANTUC查图得0.575传热量min11()QCTtW1067.2W201006.5805575.05122111000.57510020TTTTt解出254T212R12200.510054tttCTT解出243t13 水以 1.5 m/s 的流速在长为3 m、直径为mm5.2mm25的管内由 20 加热至 40，试求水与管壁之间的对流传热系数。解：水的定性温度为C30C240202b2b1fttt由附录六查得30 C时水的物性为 995.7 kg/m3，=1

45、05 Pas，=W/(mC)，Pr=则4ib50.02 1.5 995.7e3.73 1080.07 10duR（湍流）i3150600.02Ld精品w o r d 学习资料 可编辑资料-精心整理-欢迎下载-第 6 页，共 13 页文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4

46、F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M

47、4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8

48、M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J

49、8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5

50、J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ5J8M4F10K5 HQ10H7X4R10S8 ZX9A4V3H7D8文档编码:CJ