换热器的设计和评估为了氢燃料电池和涡轮系统Word文档格式.docx

换热器的设计和评估为了氢燃料电池和涡轮系统Word文档格式.docx

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鸣谢

我要感谢我的导师，博士ruhul指导和支持。

我还想感谢博士艾伦·

维克坎迪的支持作为委员会成员。

感谢道格博士，博士ladean麦基里克，博士麦克伊甸花时间与我的热应力和蠕变模型查询。

我感谢整个部门的工作人员机械和工业工程，。

感谢博士班格勒进行这一研究项目。

这项工作是由美国能源部支持下，分包合同的燃料电池的能量，18297号。

内容表

表的列表..........................................................................................................vii

人物列表.......................................................................................................viii

系统命名.......................................................................................................xii

摘要...................................................................................................................xvi

1.介绍.......................................................................................................1

背景和动机.................................................................................2

2.紧凑式换热器设计.............................................................4

紧凑式换热器特点......................................................4

板翅式.................................................................................................................5

Fin-Tube.................................................................................................................8

Microchannel.......................................................................................................11

初级表面...................................................................................................13

盘旋....................................................................................................................14

总结........................................................................................15

持久性................................................................................................................16

结垢和腐蚀..........................................................................................20

花费...........................................................................................................................21

3.问题的提法与数值分析................23

性能比较的方法.......................................................................23

数学公式-粗过滤器消除

.......................................23

数学公式-精细过滤器消除

...........................................24

数值程序-精细过滤器消除

...................................................28

瞬态热模拟

............................................................................31

数学公式...................................................................................32

解决方法........................................................................................34

热应力模拟..................................................................................39

蠕变定律公式

........................................................................................47

4.模拟认证和网络的独立性........................................52

粗细过滤验证...........................................................................................52

瞬态热仿真网络试验..........................................................53

热应力网络测试.....................................................................................56

蠕变模型验证

.....................................................................................59

5.结果与讨论................................................................................60

性能比较的方法.......................................................................60

粗过滤器消除.....................................................................................60

细过滤器消除.........................................................................................64

瞬态热模拟............................................................................70

热应力模拟..................................................................................75

低温热交换器的静态热应力...................................76

低温热交换器的瞬态热应力.............................84

高温热交换器的热应力在蠕变......................90

高温换热后的热应力蠕变........................99

高温热交换器蠕变比较.....................................107

6.结论和建议..................................................114

结论...........................................................................................................114

对今后工作的建议.................................................................118

引用的参考文献..................................................................................................121

附录...............................................................................................................126

附录一：

许可使用的图像................................................................127

列表

表页

1.Compactness........................................................................................................15

2.隔墙板的材料性能.......................................................................43

3.蠕变定律常...........................................................................................50

4.拉伸应力的敏感性.............................................................................57

5.对压力的敏感性....................................................................58

6.燃料预热器的选择.......................................................................63

7.低温换热器的......................................................63

8.燃料预热器的选择......................................................64

9.最大和最小应力的总结...............................................90

10.最大和最小应力蠕变之前范围........................................94

11最大和最小应力蠕变之后的范围..........................................101

12.范围最大和最小蠕变应变..................................................108

人物列表

图页

1.逆流板翅式换热器.................................................................7

2.最近的钎焊板翅式设计............................................................................7

3赤裸的翅片管换热器............................................................9

4.翅片管束..................................................................................................10

5.完整的鳍管式热交换器..................................................................10

6.最近的翅片管的设计......................................................................................11

7.印刷电路热交换器...........................................................................12

8.螺旋热交换器.........................................................................................15

9.典型的蠕变曲线（T>

0.4Tm）.......................................................................19

10.流体和分区网格板安装......................................................................34

11.计算顺序：

（一）和

（二）.....................36

12.换热器隔板安装和蠕变计算....45

13.蠕变适合验证..........................................................................................51

14验证码，热密度与头宽度...................................53

15.半时间增量分析：

（一）热流体的出口温度（乙）冷流体出口温度

..........................................................................................55

16.空间增量分析：

....................................................................................................55

17.平翅片热密度与压实度.................................................65

18.百叶窗翅片热密度与压实度..............................................65

19翅片热密度与压实度...................................................66

20.波纹翅片热密度与压实度................................................66

21.印刷电路热密度与压实度........................................67

22.鳍比较，热密度与压实度.....................................67

23鳍比较，流长与紧性.............................................68

24.鳍比较，热密度与流动长度......................................68

25升温速率0.03°

/：

（一）热转移从单一的换热板，

（二）热滞后...........................................................................................71

26.升温速率0.3°

钾/：

（一）热转移从单一的换热板，

（二）热滞后

..........................................................................................71

27.升温速率3°

：

...........................................................................................72

28.减震率30°

（一）热转移从单一的换热板，

（二）热滞后。

...........................................................................................72

29.出口温度坡道率3和30°

（一）热，冷侧..

...................................................................................................73

30.等高线图温度的流体和分区板：

（一）稳态匝道的情况下

...........................75

31.体温和放大在稳态中

........................76

32.稳态的四杆机构在参考温度中

.....................77

33..稳态的四连杆在工作温度中

....................78

34.四杆机构的代表

........................................................................78

35应力分量稳态的

.........................................................81

36.应力分量稳态.........................................................82

37.稳态剪切应力的单位

...............................................................83

38.冯米塞斯应力相当于稳态...........................................83

39.最大瞬态热

出现的30°

坡率情况：

（一）热转移从单一的换热板，

（二）冯米塞斯当量应力，和（三）与组件应力。

...............................85

40.身体的温度和应变瞬态放大....................86

41..应力分量的暂态...................................................87

42.Z应力分量的暂态....................................................88

43.YZ剪应力在短暂状态...........................................................88

44.冯米塞斯应力在短暂状态.......................................89

45.体温和放大应变在蠕变之前.................9146.体温和放大应变在蠕变之前.................91

47.应力分量在前htheca蠕变.................................................9548..组分应力蠕变之前..........................................