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所在平台: Coursera |
课程主页: https://www.coursera.org/learn/thermodynamics-intro
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课程名称：热力学导论：能量从这里转移到那里 课程概述： 本课程介绍了热力学的基本原理，这是您将学习的最强大的工程原理之一。热力学是研究能量从一个地方或形式转移到另一个地方或形式的科学。我们将介绍分析能源系统所需的工具，涵盖从太阳能电池板到发动机再到保温咖啡杯等各种主题。具体内容包括质量和能量守恒原理、控制质量和控制体积系统的第一定律分析、纯物质的性质和行为，以及热力学系统在稳态条件下的应用。 课程格式： 课程由讲座视频组成，视频长度约为8至12分钟，包含嵌入式小测验问题。每个章节结束时还有小测验，包含一些不在视频讲座中的练习题目。课程没有考试。 评分政策： 每道题目价值1分，正确答案得+1分，错误答案得0分。没有部分学分。您可以在每8小时内最多尝试每个测验三次，总尝试次数无限。通过测验的正确题数在每个测验开始时会显示。根据掌握学习模型，学生必须在所有8个练习测验中得分80%及以上才能完成课程。 预计工作量： 如果您遵循建议的截止日期，讲座和测验每周各需约3小时，总共约需6小时。 目标受众： 基础的本科工程或科学学生。 常见问题： - 学习这门课程的先决条件是什么？ 具备高中或大学一年级的化学、物理和微积分基础将有助于您在该课程中的成功。 - 这门课程将为我的学术生涯做些什么准备？ 热力学是许多后续课程（如热传递、内燃机、推进和气体动力学等）的先决条件。 - 这门课程将为我在现实世界中做什么准备？ 能源是全球社会面临的主要挑战之一。能源需求与清洁水、健康、粮食资源和贫困等其他重大挑战密切相关。理解能源系统的工作方式对于满足全球这些需求至关重要。由于能源需求不断增加，这门课程还为许多具有回报的职业生涯奠定了基础。 课程大纲： 第一周：讨论全球能源和电力供需的背景，强调正确使用单位的重要性，及系统的分类（开口、闭口，稳态、瞬态）的重要性。 第二周：介绍能量转移的基本定义，包括功和热的转移，以及第一定律（能量守恒）的定义。 第三周：探讨热力学性质，包括比热、内能和焓，学习它们的意义和相互关系。 第四周：结合质量和能量守恒进行系统分析，回顾热交换器、泵和涡轮等能量转移装置的常见假设。 第五周：分析瞬态系统，探讨如燃气涡轮或内燃机启动等瞬态问题。 第六周：介绍热力学第二定律及其对设备和系统效率的理论界限的影响。 第七周：深入分析Rankine电厂，这是以水或蒸汽为工作流体的固定式发电设计。 第八周：讨论包括化石燃料和电池材料的能源载体，总结课程内容，希冀学生能在能量系统中获得新技能。
Name:Week 1
Description:In this module, we frame the context of energy and power supply and demand around the world. You will learn that understanding and correctly using units are critical skills for successfully analyzing energy systems. It is also important to be able to identify and categorize systems as “open” or “closed” and “steady state” or “transient”. Thermodynamics is a topic that is very notation intense, but the notation is very helpful as a check on our assumptions and our mathematics. Additionally, in this module we will refresh our understanding of some common thermodynamic properties.
Name:Week 2
Description:In this module, we will get started with the fundamental definitions for energy transfer, including the definitions of work transfer and heat transfer. We will also show (by example) how state diagrams are valuable for explaining energy transfer processes. Then, we have all the tools we need to define the 1st Law of Thermodynamics also called the Conservation of Energy. Your second assignment will emphasize these principles and skills.
Name:Week 3
Description:In this module, we introduce our first abstract concepts of thermodynamics properties – including the specific heats, internal energy, and enthalpy. It will take some time for you to become familiar with what these properties represent and how we use these properties. For example, internal energy and enthalpy are related to temperature and pressure, but they are two distinct thermodynamic properties. One of the hardest concepts of thermodynamics is relating the independent thermodynamic properties to each other. We have to become experts at these state relations in order to be successful in our analysis of energy systems. There are several common approximations, including the ideal gas model, which we will use in this class. The key to determining thermodynamic properties is practice, practice, practice! Do as many examples as you can.
Name:Week 4
Description:In this module we introduce the combined application of the Conservation of Mass and the Conservation of Energy for system analysis. We also review the common assumptions for typical energy transfer devices, like heat exchangers, pumps and turbines. Together these components will form the basis for all power plants used around the world.
Name:Week 5
Description:In this module, we tackle some of the most difficult systems to analyze – transient or time-varying systems. Any system where the energy transfer changes as a function of time requires transient analysis. Not only are these difficult problems to analyze, they are also difficult systems to design and interrogate. Some important transient problems include the start-up of a gas turbine or an internal combustion engine. Such transients are becoming more integral to the electrical power grid due to the introduction of more renewable power sources which are also more intermittent. These are very relevant and timely topics for the stationary power sector.
Name:Week 6
Description:In this module, we introduce some of the concepts of the Second Law of Thermodynamics. We will only discuss a small fraction of the vast material that falls under the topic of the Second Law. I encourage you to explore beyond our course material for very interesting discussions on the outcomes of the Second Law which include entropy, the absolute temperature scale and Carnot cycles. The most important aspect for our class, is that the Second Law provides a basis for defining the theoretical maximums and minimums for processes. Using these limits, we can define device and system efficiencies. We demonstrate these limits with examples of basic power plants. A good “take-home” exercise is to apply these limits to some of the devices and systems you see every day around you.
Name:Week 7
Description:In this module we focus on in-depth analysis of a Rankine power plant. The Rankine power plant is the fundamental design for stationary power generation when the working fluid is water (or steam) and the energy carrier is nuclear, coal, gas, or thermal solar power. We also learn that conventional power plants generate a lot of waste heat! Co-generation is a great way to use that waste heat. Can you think of a few ways you might capture waste heat and use it productively? Then you might have your next environmentally sustainable business venture!
Name:Week 8
Description:In this module, we have a brief discussion of energy carriers – including fossil fuels and battery materials. These lectures highlight the thermodynamic properties of these energy carriers and storage materials that make these systems so attractive and at the same time, so difficult to replace. As this is our last module of the course, I hope you have enjoyed this Introduction to Thermodynamics and that you have learned some new skills. Good luck on all your adventures in energy systems!,
COURSE DESCRIPTION This course provides an introduction to the most powerful engineering principles you will ever learn - Thermodynamics: the science of transferring energy from one place or form to another place or form. We will introduce the tools you need to analyze energy systems from solar panels, to engines, to insulated coffee mugs. More specifically, we will cover the topics of mass and energy conservation principles; first law analysis of control mass and control volume systems; properties and behavior of pure substances; and applications to thermodynamic systems operating at steady state conditions. COURSE FORMAT The class consists of lecture videos, which average 8 to 12 minutes in length. The videos include integrated In-Video Quiz questions. There are also quizzes at the end of each section, which include problems to practice your analytical skills that are not part of video lectures. There are no exams. GRADING POLICY Each question is worth 1 point. A correct answer is worth +1 point. An incorrect answer is worth 0 points. There is no partial credit. You can attempt each quiz up to three times every 8 hours, with an unlimited number of total attempts. The number of questions that need to be answered correctly to pass are displayed at the beginning of each quiz. Following the Mastery Learning model, students must pass all 8 practice quizzes with a score of 80% or higher in order to complete the course. ESTIMATED WORKLOAD If you follow the suggested deadlines, lectures and quizzes will each take approximately ~3 hours per week each, for a total of ~6 hours per week. TARGET AUDIENCE Basic undergraduate engineering or science student. FREQUENTLY ASKED QUESTIONS - What are the prerequisites for taking this course? An introductory background (high school or first year college level) in chemistry, physics, and calculus will help you be successful in this class. -What will this class prepare me for in the academic world? Thermodynamics is a prerequisite for many follow-on courses, like heat transfer, internal combustion engines, propulsion, and gas dynamics, to name a few. -What will this class prepare me for in the real world? Energy is one of the top challenges we face as a global society. Energy demands are deeply tied to the other major challenges of clean water, health, food resources, and poverty. Understanding how energy systems work is key to understanding how to meet all these needs around the world. Because energy demands are only increasing, this course also provides the foundation for many rewarding professional careers.
