传热学课程介绍 传热学是储运与建筑工程学院能源与动力工程系开设的课程之一。本课程开课历史悠久,至今已有六十多年的历史。其前身北京石油学院建校初期开设的《热工学》,课程内容包括工程热力学、传热学、蒸汽机、内燃机、锅炉等,开课对象为炼制系各专业和石油矿场机械专业。后来,课程改为《热工基础》,课程内容包括工程热力学和传热学,除了当时的勘探系和机械系自动化专业外,其他工科专业都开设本课程。1962年教学改革后,根据专业的需要,课程逐渐分为工程热力学、传热学、内燃机等多门课程,不同专业对课程内容的要求也有所不同。恢复高考后,课程主要主要对象我校的石油骨干和优势专业,如钻井、采油、油藏(石油工程专业的前身)、油气储运工程、石油化工机械(过程装备与控制工程的前身)等。作为这些专业的技术基础课,它在石油类专业的人才培养体系中具有非常重要的地位和作用。自1986年后,随着我校热能与动力工程、建筑环境与设备工程等专业的招生,它自然地又成为这些专业的主干技术基础课。另外,机械设计制造及其自动化专业、安全工程专业、材料成型与控制工程专业也开设本课程。目前我校开设传热学课程的专业有能源与动力工程、建筑环境与能源应用工程、油气储运工程、石油工程、海洋油气工程、安全工程、工程力学、过程装备与控制工程、机械设计及自动化等专业。 传热学是研究温差作用下热量传递规律的一门学科,课程的教学目标是使学生获得比较宽广和扎实的热量传递规律的基础知识,具备分析工程传热问题的基本能力,掌握解决工程传热问题的基本方法并具备相应的计算能力,并掌握具备初步的实验技能。 传热学课程的主要内容包括: (1)导热的基本理论与工程应用:导热基本定律和导热微分方程式,一维稳态导热,一维肋片稳态导热分析,一维非稳态导热问题的分析解及其讨论,集总参数法分析,半无限大物体内的非稳态导热,导热问题的数值分析等。 (2)对流换热原理及工程应用:对流传热过程的影响因素,对流换热的微分方程组及边界条件,边界层的概念,动量传递与热能传递的比拟,相似理论或量纲分析在对流换热中的应用。外掠等温平壁层流换热分析,单相流体管槽内的对流换热分析,绕掠单管、管束强制对流换热分析、大空间及有限空间自然对流换热分析。 (3)相变换热:凝结换热的类型,膜状凝结换热计算及主要影响因素,沸腾换热和大容器饱和沸腾曲线,,核态沸腾换热的工程计算。 (4)热辐射及辐射传热:热辐射的基本概念,黑体辐射的基本定律,实际物体辐射特点,灰体和基尔霍夫定律。表面夹辐射传热的分析与计算,角系数概念及其特性,气体辐射的特点,二氧化碳和水蒸汽及其混合物的黑度、吸收率的图表法计算。 (5)传热过程与换热器。传热过程与传热系数的计算,工程上典型的换热器介绍,换热器热计算的依据和方法。 经过热工教研室、能源与动力工程系几代人的共同努力和实践,1997年《工程热力学与传热学》课程在学校组织的第三次优质课程评估中被确定为校级优质课,并在2001年和2004年的第四、五次校优质课评估中被再次确定为校优质课。2006年列入山东省精品课程建设。 Heat Transfer is one of the courses offered by department of energy and power engineering in College of Pipeline and Civil Engineering. Up to the present, it has been taught with a history of more than sixty years. The precursor of heat Transfer is pyrology at the initial building stage of Beijing Petroleum Institute, and its contents covers Engineering Thermodynamics, Heat Transfer, Steam Engine, Gas Engine, Boiler, etc., establishing for all the majors in Refining Department and Oil Mineral Machinery. Subsequently, the name of this course was changed as fundamental of thermo-technology, the contents were also modified as Engineering Thermodynamics and Heat Transfer, offering for all engineering majors except exploration department and Automation major in Mechanics Department. After teaching reform in 1962, this course was gradually decomposed into several courses such as Engineering Thermodynamics, Heat transfer, and Gas engine according to the developing requirement of our department. Since resumption of college entrance examination, the target students were mainly oil core majors, such as Well Drilling, Oil Recovery, Oil Reservoirs (the precursor of Petroleum Engineering), Oil-Gas Storage and Transportation Engineering, and Petro-chemical Machinery (the precursor of Process Equipment and Control Engineering ). As the professional technical course of all these majors, Heat Transfer plays an very important role on the Talent-cultivation System for petroleum relevant majors. Since 1986, the Thermal Energy & Power Engineering and Architectural Environment & Equipment Engineering were began to recruit students and Heat Transfer also became professional foundation course of these majors naturally, as well as Machine Design Manufacture and automation, Safety Engineering, and Material Forming & Control Engineering. At present, Heat Transfer are set up for Energy and Power Engineering, Architectural Environment and Energy Application Engineering, Oil-Gas Storage and Transportation Engineering, Petroleum Engineering, Offshore Gas and Petroleum Engineering, Safety Engineering, Engineering Mechanics, Process Equipment and Control Engineering, Machine Design Manufacture and Automation in our university. Heat transfer is a subject which studied heat transfer law caused by temperature difference, and the teaching goals of this course are that students could obtain wide and sturdy basic knowledge of heat transfer law, own the basic ability to analyze engineering heat transfer problems, grasp the basic method of solving engineering heat transfer problems, the corresponding numerical ability and preliminary experimental skills. The main contents of Heat transfer is main as follows: (1) The basic theory and engineering application of heat conduction: the basic law of the heat conduction and partial differential equation of heat conduction, one-dimensional steady heat conduction, the heat conduction analysis of one-dimensional fin, the analytical solution of one-dimensional unsteady heat conduction problem and its discussion, lumped parameter method, unsteady heat conduction of semi-infinite body, and the numerical analysis of heat conduction. (2) The principle and engineering application of convection heat transfer: the influence factors of convective heat transfer, partial differential equation of convection heat transfer and boundary condition, the conception of boundary layer, the analogy between momentum transfer and heat transfer, the application of similarity theory and dimensional analysis in convection heat transfer, thermal analysis of laminar flow over the isothermal flat wall, analysis on convection heat transfer of the single phase fluid in channel, analysis on forced convection heat transfer around single pipe or pipe bundles, analysis on natural convection heat transfer in infinite space and confined space. (3) Phase-change Heat Transfer: the types of condensation heat transfer, the calculation and the main influence factors of film condensation heat transfer, boiling heat transfer, the saturation curve of poor boiling, and the engineering calculation of nucleate boiling heat transfer. (4) Thermal radiation and radiation heat exchange: the basic concept of thermal radiation, the basic law of black body radiation, the characteristics of the actual object radiation, gray body and Kirchhoff’s law, the analysis and calculation of the radiation heat exchange between two surfaces, the concept and the principles of angle factor, the characteristics of gaseous radiation, the calculation using chart of blackness and absorptivity of carbon dioxide, water vapor and the its mixture.