【毕业论文】精细化学品生产技术

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1、毕业论文河北化工医药职业技术学院毕业论文专业：精细化学品生产技术摘要：目录中文摘要··································································2英文摘要··································································3-18-毕业论文第一章传热学····························································5第二章传热学发展史··

2、····················································6第三章传热的基本方式····················································7第四章聚二甲基硅氧烷····················································81.聚二甲基硅氧烷简介·····················································81.1主要特性和物理性能指标·······

3、······································81.1.1主要特性························································81.1.2物理性能指标····················································81.2主要用途··························································101.3包装及储运·····················

4、··············-18-毕业论文·····················112.传热介质的选择及应用··················································112.1传热介质的选择····················································112.2换热流程与传热系统················································11第五章聚二甲基硅氧烷的应用·················

5、····························16结论·····································································17参考文献·································································18致谢·····································································19-18-毕业论文传热学传热学是研究物

6、体内部或物体与物体之间由温度差引起热量传递过程的学科。飞行器及其推进系统的发展提出了大量的传热学问题。传热的基本方式有导热、对流传热和辐射传热。传热不仅是常见的自然现象，而且广泛存在于工程技术领域。提高锅炉的蒸汽产量，防止燃气轮机燃烧室过热、减小内燃机气缸和曲轴的热应力、确定换热器的传热面积和控制热加工时零件的变形等，都是典型的传热问题。-18-毕业论文第二章传热学发展史传热学作为学科形成于19世纪。在热对流方面，英国科学家牛顿于1701年在估算烧红铁棒的温度时，提出了被后人称为牛顿冷却定律的数学表达式，不过它并没有揭示出对

7、流换热的机理。对流换热的真正发展是19世纪末叶以后的事情。1904年德国物理学家普朗特的边界层理论和1915年努塞尔的因次分析，为从理论和实验上正确理解和定量研究对流换热奠定了基础。1929年，施密特指出了传质与传热的类同之处。在热传导方面，法国物理学家毕奥于1804年得出的平壁导热实验结果是导热定律的最早表述。稍后，法国的傅里叶运用数理方法，更准确地把它表述为后来称为傅里叶定律的微分形式。热辐射方面的理论比较复杂。1860年，基尔霍夫通过人造空腔模拟绝对黑体，论证了在相同温度下以黑体的辐射率(黑度)为最大，并指出物体的辐射

8、率与同温度下该物体的吸收率相等，被后人称为基尔霍夫定律。1878年，斯忒藩由实验发现辐射率与绝对温度四次方成正比的事实，1884年又为玻耳兹曼在理论上所证明，称为斯忒藩-玻耳兹曼定律，俗称四次方定律。1900年，普朗克在研究空腔黑体辐射时，得出了普朗克热辐射定律。这个定律不仅描述了黑体辐射