heat engine

简明释义

热机

英英释义

例句

1.The car's heat engine 热机 converts fuel into kinetic energy to propel the vehicle.

汽车的热机 heat engine将燃料转化为动能以推动车辆。

2.A refrigerator operates in reverse compared to a traditional heat engine 热机, transferring heat from inside to outside.

冰箱的运作与传统的热机 heat engine相反，将热量从内部转移到外部。

3.The efficiency of a heat engine 热机 can be affected by the temperature difference between the heat source and sink.

一个热机 heat engine的效率可能会受到热源和热汇之间温差的影响。

4.In a power plant, a heat engine 热机 is used to generate electricity from steam.

在发电厂中，热机 heat engine用于从蒸汽中产生电力。

5.The Carnot cycle is a theoretical model that describes the maximum efficiency of a heat engine 热机.

卡诺循环是一个理论模型，描述了热机 heat engine的最大效率。

作文

A heat engine is a device that converts thermal energy into mechanical work. This process is fundamental to many machines and vehicles we rely on in our daily lives. The basic principle behind a heat engine involves the conversion of heat, typically generated by burning fuel, into motion. This concept has been pivotal in the development of various technologies, including automobiles, airplanes, and power plants.The operation of a heat engine can be illustrated through the example of an internal combustion engine, which is commonly found in cars. In this type of engine, fuel is mixed with air and ignited, producing high-temperature gases. These gases expand rapidly and push against the piston, converting the thermal energy from the fuel into kinetic energy, which ultimately powers the vehicle.There are two primary types of heat engines: external combustion engines and internal combustion engines. External combustion engines, such as steam engines, burn fuel outside the engine itself to heat water, creating steam that drives a piston or turbine. On the other hand, internal combustion engines burn fuel directly within the engine’s cylinders. Both types of engines operate on the same fundamental principles of thermodynamics.The efficiency of a heat engine is a critical factor in its design and operation. Efficiency is defined as the ratio of useful work output to the heat input. According to the second law of thermodynamics, no heat engine can be 100% efficient because some energy is always lost as waste heat. Engineers strive to improve the efficiency of heat engines through various means, such as better materials, advanced designs, and innovative cooling systems.In recent years, there has been a growing emphasis on developing more sustainable heat engines. With the increasing awareness of climate change and the depletion of fossil fuels, researchers are exploring alternative fuels and renewable energy sources. For instance, biofuels and hydrogen are being investigated as potential replacements for traditional gasoline and diesel. Additionally, advancements in electric and hybrid vehicles demonstrate a shift towards reducing reliance on conventional heat engines.Moreover, the role of heat engines extends beyond transportation. They are also crucial in industrial processes, where they power machinery and equipment. In power generation, heat engines are used in conjunction with turbines to produce electricity. Natural gas and coal-fired power plants utilize heat engines to convert thermal energy into electrical energy, serving millions of homes and businesses worldwide.In conclusion, a heat engine is an essential component of modern technology, playing a vital role in transportation, industry, and energy production. Understanding how heat engines function and their impact on our environment is crucial as we move towards more sustainable energy solutions. As we continue to innovate and improve these systems, the future of heat engines will likely involve a combination of traditional methods and new technologies aimed at enhancing efficiency and reducing environmental impact.

热机是将热能转化为机械功的装置。这个过程对于我们日常生活中依赖的许多机器和车辆至关重要。热机的基本原理涉及将通常通过燃烧燃料产生的热量转化为运动。这个概念在汽车、飞机和发电厂等各种技术的发展中发挥了关键作用。热机的运作可以通过内部燃烧发动机的例子来说明，这种发动机通常在汽车中找到。在这种类型的发动机中，燃料与空气混合并点燃，产生高温气体。这些气体迅速膨胀并推动活塞，将来自燃料的热能转化为动能，最终驱动车辆。热机主要有两种类型：外燃机和内燃机。外燃机，例如蒸汽机，在发动机本身之外燃烧燃料以加热水，产生蒸汽，驱动活塞或涡轮。另一方面，内燃机则直接在发动机的气缸内燃烧燃料。这两种类型的发动机都基于热力学的基本原理。热机的效率是其设计和运作中的一个关键因素。效率被定义为有用功输出与热输入的比率。根据热力学第二定律，没有任何热机能够达到100%的效率，因为总会有一些能量以废热的形式损失。工程师们通过更好的材料、先进的设计和创新的冷却系统等各种手段来提高热机的效率。近年来，开发更可持续的热机越来越受到重视。随着气候变化意识的增强和化石燃料的耗竭，研究人员正在探索替代燃料和可再生能源。例如，生物燃料和氢气被研究作为传统汽油和柴油的潜在替代品。此外，电动和混合动力车辆的进步表明，我们正朝着减少对传统热机的依赖而转变。此外，热机的作用不仅限于交通运输。它们在工业过程中也至关重要，为机械和设备提供动力。在发电中，热机与涡轮一起使用以生产电力。天然气和煤炭发电厂利用热机将热能转化为电能，服务于全球数百万家庭和企业。总之，热机是现代技术的重要组成部分，在交通、工业和能源生产中发挥着至关重要的作用。理解热机的功能及其对我们环境的影响是至关重要的，因为我们朝着更可持续的能源解决方案迈进。随着我们继续创新和改进这些系统，热机的未来可能会结合传统方法和旨在提高效率和减少环境影响的新技术。