00 1. What does Engineering thermodynamics focus on? (热力学主要研究什么问题?) Thermodynamics is the branch of science which studies the rule lat governs the transformation of thermal energy to other forms of energy. Also it focuses how to use thermal energy efficiently 工程热力学主要关注的是如何有效利用热能 因而,主要研究热能和其它形式能量之间的转换规律。 It includes all aspects of energy and energy transformations (能量转换), including power generation, refrigeration and relationships among the properties of matter. www.themegallery.com Company Logo
www.themegallery.com Company Logo Thermodynamics is the branch of science which studies the rule that governs the transformation of thermal energy to other forms of energy. Also it focuses how to use thermal energy efficiently. 工程热力学主要关注的是如何有效利用热能. 因而，主要研究热能和其它形式能量之间的转换规律。 It includes all aspects of energy and energy transformations （能量转换), including power generation, refrigeration and relationships among the properties of matter. 1. What does Engineering thermodynamics focus on? ( 热力学主要研究什么问题?)
Thermodynamics can be defined as a branch of science of energy. Therme dynamis (Greek words) heat power 热能 Thermal Energy www.themegallery.com Company Logo
www.themegallery.com Company Logo Thermodynamics can be defined as a branch of science of energy. heat Therme dynamis power (Greek words) 热能 Thermal Energy
transformation from thermal energy to mechanical 2. Why do we choose to learn the rules which gover energy (为什么要研究热能与机械能之间的转换规律?) (1) Categories of energy resources in nature (自然能源的种类) A. Chemical energy(化学能): such as coal(煤炭) crude oil(石油) natural gas(天然气) firedamp(沼气)retc www.themegallery.com Company Logo
www.themegallery.com Company Logo (1) Categories of energy resources in nature (自然能源的种类) A. Chemical energy（化学能）: such as : coal（煤炭） crude oil（石油 ） natural gas （天然气） firedamp （沼气） , etc. 2. Why do we choose to learn the rules which govern transformation from thermal energy to mechanical energy? (为什么要研究热能与机械能之间的转换规律？）
00 B. Mechanical energy(机械能) such as: wind resources(风力资源) water resources(水力资源) tidal energy(潮汐能)retc C. Thermal energy(热能) such as: solar energy(太阳能) geothermal energy(地热能),etc D. Nuclear energy(原子能) www.themegallery.com Company Logo
www.themegallery.com Company Logo B. Mechanical energy（机械能） such as: wind resources（风力资源 ） water resources（水力资源 ） tidal energy（潮汐能）, etc. C. Thermal energy （热 能 ） such as: solar energy（太阳能） geothermal energy（地热能）,etc. D. Nuclear energy（原子能）
(2) How do we use the energy resources (能源的利用) Chemical energy Combustion(燃 hermal energy Mechanical energy can be used directly. Fusion or fission reaction Nuclear energy Thermal energy (核聚变或和裂变) rectly used Thermal energy indirectly used www.themegallery.com Company Logo
www.themegallery.com Company Logo Chemical energy Thermal energy Fusion or fission reaction Combustion（燃烧） directly used Mechanical energy can be used directly. （核聚变或和裂变） (2) How do we use the energy resources ? （能源的利用） Thermal energy Nuclear energy Thermal energy indirectly used