heat engine

简明释义

热机

英英释义

例句

1.The Carnot cycle is an idealized process for a heat engine 热机 that maximizes efficiency.

卡诺循环是最大化效率的理想化热机 heat engine 过程。

2.In thermodynamics, the efficiency of a heat engine 热机 is defined by the work output over the heat input.

在热力学中，热机 heat engine 的效率由输出功与输入热量之比定义。

3.Many power plants utilize heat engines 热机 to convert thermal energy into electrical energy.

许多发电厂利用热机 heat engines 将热能转化为电能。

4.The car's heat engine 热机 converts fuel into motion.

这辆车的热机 heat engine 将燃料转化为运动。

5.A steam turbine is a type of heat engine 热机 that uses steam to generate electricity.

蒸汽涡轮是一种使用蒸汽发电的热机 heat engine。

作文

A heat engine is a fascinating and essential component of modern technology, playing a pivotal role in powering various machines and vehicles. At its core, a heat engine is a device that converts thermal energy into mechanical work. This principle is rooted in the laws of thermodynamics, which govern the behavior of heat and energy transfer. The basic operation of a heat engine involves taking in heat from a high-temperature source, converting part of that heat into work, and then releasing the remaining heat to a low-temperature sink.The efficiency of a heat engine is a crucial factor that determines how effectively it can convert heat into work. The maximum theoretical efficiency is dictated by the Carnot efficiency, which depends on the temperatures of the heat source and sink. In practical applications, however, real-world heat engines often operate at lower efficiencies due to various factors such as friction, heat losses, and other inefficiencies inherent in the system.There are several types of heat engines, each with its unique design and application. One of the most common examples is the internal combustion engine found in automobiles. This type of heat engine works by burning fuel to produce hot gases that expand and push against pistons, converting thermal energy into mechanical energy that powers the vehicle. Another example is the steam engine, which was pivotal during the Industrial Revolution. Steam engines utilize boiling water to create steam, which then drives a piston or turbine, again converting heat into useful work.In contrast, external combustion engines, like those found in power plants, burn fuel outside the engine itself to produce steam or hot gases that drive turbines. These heat engines are often used for large-scale electricity generation and can achieve higher efficiencies compared to their internal combustion counterparts.The development and optimization of heat engines have significant implications for energy consumption and environmental sustainability. As the world seeks to reduce carbon emissions and transition to cleaner energy sources, improving the efficiency of heat engines becomes increasingly important. Innovations in materials, design, and alternative fuels are paving the way for more efficient and environmentally friendly heat engines.In conclusion, heat engines are integral to our daily lives, powering everything from our cars to our homes. Understanding the principles behind these devices not only highlights the importance of thermal energy conversion but also emphasizes the need for continued research and development in this field. As we strive for a more sustainable future, enhancing the performance and efficiency of heat engines will be crucial in meeting our energy demands while minimizing environmental impact.

热机是现代技术中一个迷人且重要的组成部分，在为各种机器和车辆提供动力方面发挥着关键作用。热机的核心是将热能转化为机械功。这一原理根植于热力学定律，这些定律支配着热量和能量转移的行为。热机的基本操作涉及从高温源吸收热量，将部分热量转化为功，然后将剩余的热量释放到低温汇。热机的效率是决定其将热量转化为功的有效性的重要因素。最大理论效率由卡诺效率决定，该效率取决于热源和热汇的温度。然而，在实际应用中，现实世界的热机通常由于摩擦、热损失以及系统固有的其他低效而以较低的效率运行。有几种类型的热机，每种类型都有其独特的设计和应用。其中一个最常见的例子是汽车中的内燃机。这种类型的热机通过燃烧燃料产生热气体，这些气体膨胀并推动活塞，将热能转化为推动车辆的机械能。另一个例子是蒸汽机，它在工业革命期间发挥了关键作用。蒸汽机利用沸水产生蒸汽，然后驱动活塞或涡轮，再次将热量转化为有用的功。相比之下，外燃机，如发电厂中的那些，燃烧燃料在发动机外部产生蒸汽或热气体来驱动涡轮。这些热机通常用于大规模发电，并且可以实现比内燃机更高的效率。热机的发展和优化对能源消耗和环境可持续性具有重要意义。随着世界寻求减少碳排放并过渡到更清洁的能源来源，提高热机的效率变得越来越重要。在材料、设计和替代燃料方面的创新正在为更高效和环保的热机铺平道路。总之，热机对我们的日常生活至关重要，为我们的汽车和家庭提供动力。理解这些设备背后的原理不仅突显了热能转化的重要性，还强调了在这一领域持续研究和发展的必要性。随着我们努力实现更可持续的未来，提高热机的性能和效率将对满足我们的能源需求，同时最小化环境影响至关重要。