external combustion engine

简明释义

外燃机

英英释义

例句

1.An external combustion engine is often used in marine applications, such as in ships that use steam turbines.

在海洋应用中，通常使用外燃机，例如在使用蒸汽涡轮的船只中。

2.Many power plants utilize an external combustion engine to generate electricity by burning natural gas or biomass.

许多发电厂利用外燃机通过燃烧天然气或生物质来发电。

3.The steam locomotive operates on the principle of an external combustion engine, where coal is burned outside the engine to produce steam.

蒸汽机车的工作原理是基于外燃机，在这种情况下，煤在发动机外部燃烧以产生蒸汽。

4.The efficiency of an external combustion engine can be improved by using a heat exchanger to capture waste heat.

通过使用热交换器捕获废热，可以提高外燃机的效率。

5.The design of an external combustion engine allows for greater fuel flexibility compared to internal combustion engines.

与内燃机相比，外燃机的设计允许更大的燃料灵活性。

作文

The concept of an external combustion engine has fascinated engineers and inventors for centuries. Unlike internal combustion engines, which burn fuel within the engine itself, an external combustion engine operates by burning fuel outside the engine to produce steam or hot gases that drive a piston or turbine. This fundamental difference in design leads to various advantages and disadvantages, making the external combustion engine a unique topic in the world of mechanical engineering.One of the most significant advantages of an external combustion engine is its ability to use a wide range of fuels. While internal combustion engines typically rely on gasoline or diesel, external combustion engines can utilize coal, biomass, natural gas, or even waste materials. This versatility not only makes them more adaptable to different energy sources but also contributes to their potential for sustainability.Moreover, external combustion engines tend to operate at lower temperatures compared to their internal counterparts. This characteristic can lead to increased efficiency and reduced wear and tear on engine components. Additionally, because the combustion process occurs outside the engine, there is less risk of knocking or pre-ignition, which can be problematic in internal combustion engines. As a result, external combustion engines often have longer lifespans and require less maintenance over time.However, there are also challenges associated with external combustion engines. One of the primary drawbacks is their size and weight. Due to the need for boilers and other auxiliary equipment, these engines are generally bulkier than internal combustion models. This can limit their application in vehicles, where space and weight are critical factors. Furthermore, the initial setup and operational costs of an external combustion engine can be higher, as they require additional infrastructure to manage the combustion process effectively.Despite these challenges, external combustion engines have found their place in various applications. They are commonly used in power plants to generate electricity, where their ability to burn diverse fuels can be particularly advantageous. Additionally, steam locomotives, which are a classic example of external combustion engines, played a pivotal role in the development of transportation during the Industrial Revolution. Even today, some modern ships and large stationary engines still utilize this technology due to its reliability and efficiency.In conclusion, understanding the workings and applications of an external combustion engine provides valuable insight into the evolution of engine technology. While they may not be as prevalent in everyday vehicles, their versatility, efficiency, and adaptability ensure they remain relevant in specific industries. As we continue to seek sustainable energy solutions, the external combustion engine may play an increasingly important role in our transition towards cleaner and more efficient energy systems.

外燃机的概念吸引了工程师和发明家几个世纪以来的关注。与在发动机内部燃烧燃料的内燃机不同，外燃机通过在发动机外部燃烧燃料来产生蒸汽或热气体，从而驱动活塞或涡轮。这种设计上的根本差异导致了各种优缺点，使得外燃机在机械工程领域成为一个独特的话题。外燃机最显著的优点之一是它能够使用广泛的燃料。虽然内燃机通常依赖于汽油或柴油，但外燃机可以利用煤、生物质、天然气甚至废料。这种多样性不仅使它们在不同能源来源中更具适应性，还为其可持续性潜力做出了贡献。此外，外燃机通常在较低的温度下运行。这一特征可以提高效率并减少发动机部件的磨损。此外，由于燃烧过程发生在发动机外部，因此发生敲击或提前点火的风险较小，而这些问题在内燃机中可能会造成麻烦。因此，外燃机往往具有更长的使用寿命，并且随着时间的推移需要更少的维护。然而，与外燃机相关的挑战也存在。主要缺点之一是它们的体积和重量。由于需要锅炉和其他辅助设备，这些发动机通常比内燃机更笨重。这可能限制它们在车辆中的应用，因为空间和重量是关键因素。此外，外燃机的初始设置和操作成本可能更高，因为它们需要额外的基础设施来有效管理燃烧过程。尽管面临这些挑战，外燃机在各种应用中找到了自己的位置。它们通常用于发电厂发电，在那里它们能够燃烧多种燃料的能力尤为重要。此外，蒸汽机车作为外燃机的经典例子，在工业革命期间对交通运输的发展发挥了重要作用。即使在今天，一些现代船舶和大型固定式发动机仍然利用这一技术，因为它的可靠性和效率。总之，了解外燃机的工作原理和应用为我们提供了关于发动机技术演变的宝贵见解。虽然它们在日常车辆中的普及程度可能不如内燃机，但它们的多样性、效率和适应性确保它们在特定行业中仍然保持相关性。随着我们继续寻求可持续能源解决方案，外燃机可能在我们向更清洁、更高效的能源系统过渡中发挥越来越重要的作用。