rankine cycle

简明释义

兰金循环

英英释义

例句

1.In many thermal systems, the rankine cycle is preferred due to its simplicity and efficiency.

在许多热力系统中，因其简单性和高效性，兰金循环是首选。

2.The power plant operates using the rankine cycle, which is an efficient method for converting heat into work.

该发电厂采用兰金循环，这是一种将热能转化为功的高效方法。

3.The efficiency of the rankine cycle can be improved by using superheated steam.

通过使用过热蒸汽，可以提高兰金循环的效率。

4.The rankine cycle is a fundamental concept in thermodynamics that describes how heat engines operate.

兰金循环是热力学中的一个基本概念，描述了热机的工作原理。

5.Engineers often analyze the rankine cycle to optimize the performance of steam turbines.

工程师们经常分析兰金循环以优化蒸汽涡轮的性能。

作文

The Rankine cycle is a thermodynamic cycle that converts heat into mechanical work, and it is widely used in power generation. Named after the Scottish engineer William John Macquorn Rankine, this cycle is fundamental in understanding how steam engines and thermal power plants operate. The Rankine cycle consists of four main processes: isentropic compression, isobaric heat addition, isentropic expansion, and isobaric heat rejection. Each of these processes plays a crucial role in the efficiency of the cycle and the overall performance of the system.In the first stage of the Rankine cycle, the working fluid, typically water, is pumped from a low-pressure state to a high-pressure state. This process is known as isentropic compression, where the pump requires work input to increase the pressure of the liquid. Despite the work input, this process is efficient because the liquid does not change its temperature significantly during this compression.The second stage involves isobaric heat addition, where the high-pressure liquid is heated in a boiler. During this phase, the liquid absorbs heat from an external source, such as burning fossil fuels or nuclear reactions, transforming it into steam. This process is critical as it determines the energy available for conversion into work. The efficiency of this stage greatly influences the overall efficiency of the Rankine cycle.Once the working fluid has been converted into steam, it enters the third stage: isentropic expansion. In this stage, the high-pressure steam expands through a turbine, performing work on the turbine blades. As the steam expands, it loses pressure and temperature, which results in the production of mechanical energy. This mechanical energy can then be converted into electrical energy using a generator. The amount of work produced during this stage is a key factor in the effectiveness of the Rankine cycle.Finally, the last stage of the Rankine cycle is isobaric heat rejection. After passing through the turbine, the steam enters a condenser where it releases heat to a cooling medium, usually water or air. This process converts the steam back into liquid form at a lower pressure, completing the cycle. The efficiency of this heat rejection process is vital, as any loss of heat can affect the overall performance of the cycle.In summary, the Rankine cycle is an essential component of thermal power generation, and its efficiency directly impacts the performance of power plants. Understanding the individual stages of the cycle allows engineers to optimize each process, leading to improved energy conversion and reduced environmental impact. As we continue to seek sustainable energy solutions, the principles of the Rankine cycle remain relevant, guiding innovations in clean energy technologies. By grasping the fundamentals of this cycle, we can better appreciate its significance in our quest for efficient and sustainable energy production.

Rankine cycle是一种热力学循环，将热量转化为机械功，广泛应用于发电。它以苏格兰工程师威廉·约翰·麦科恩·兰金的名字命名，此循环在理解蒸汽机和热电厂的工作原理中至关重要。Rankine cycle包括四个主要过程：绝热压缩、等压加热、绝热膨胀和等压冷却。每个过程在循环的效率和系统的整体性能中起着关键作用。在Rankine cycle的第一阶段，工作流体，通常是水，从低压状态泵送到高压状态。这个过程被称为绝热压缩，其中泵需要输入功来提高液体的压力。尽管需要输入功，但这个过程是高效的，因为液体在压缩过程中温度变化不大。第二阶段涉及等压加热，高压液体在锅炉中加热。在此阶段，液体从外部来源吸收热量，例如燃烧化石燃料或核反应，将其转化为蒸汽。这个过程至关重要，因为它决定了可用于转化为功的能量。这个阶段的效率极大地影响了Rankine cycle的整体效率。一旦工作流体转化为蒸汽，它就进入第三阶段：绝热膨胀。在此阶段，高压蒸汽通过涡轮膨胀，对涡轮叶片施加功。随着蒸汽膨胀，它失去压力和温度，从而产生机械能。这种机械能可以通过发电机转化为电能。在这一阶段产生的功是Rankine cycle有效性的关键因素。最后，Rankine cycle的最后阶段是等压冷却。在经过涡轮后，蒸汽进入冷凝器，在那里它将热量释放给冷却介质，通常是水或空气。这个过程将蒸汽转化回低压的液体，完成循环。这个热量排放过程的效率至关重要，因为任何热量损失都可能影响循环的整体性能。总之，Rankine cycle是热电发电的重要组成部分，其效率直接影响发电厂的性能。理解循环的各个阶段使工程师能够优化每个过程，从而提高能量转化效率并减少环境影响。随着我们继续寻求可持续的能源解决方案，Rankine cycle的原理依然相关，引导着清洁能源技术的创新。通过掌握这一循环的基本原理，我们可以更好地欣赏它在追求高效和可持续能源生产中的重要性。