reversible cycle

简明释义

可逆循环

英英释义

例句

1.In a reversible cycle, the system returns to its original state after the process is completed.

在可逆循环中，系统在过程完成后返回到其原始状态。

2.Understanding the concept of a reversible cycle is crucial for designing efficient refrigeration systems.

理解可逆循环的概念对于设计高效的制冷系统至关重要。

3.The Carnot engine operates on a reversible cycle, maximizing efficiency between two heat reservoirs.

卡诺发动机在两个热库之间运行于一个可逆循环，从而最大化效率。

4.Real engines cannot achieve a reversible cycle due to friction and other irreversible processes.

由于摩擦和其他不可逆过程，真实的发动机无法实现可逆循环。

5.In thermodynamics, a reversible cycle is an idealized process that can be reversed without any net change in the system or surroundings.

在热力学中，可逆循环是一个理想化的过程，可以在系统或环境没有任何净变化的情况下被逆转。

作文

The concept of a reversible cycle is fundamental in thermodynamics and plays a crucial role in understanding energy transformations. A reversible cycle refers to a thermodynamic process that can be reversed without leaving any change in the system or its surroundings. This idealized process is significant because it allows scientists and engineers to analyze the efficiency of engines and refrigerators, as well as to understand the limits imposed by the laws of thermodynamics.In a reversible cycle, the system undergoes a series of processes that can be reversed step by step. For example, consider the Carnot cycle, which is a theoretical model that demonstrates the maximum possible efficiency of a heat engine operating between two heat reservoirs. The Carnot cycle consists of four distinct processes: two isothermal processes and two adiabatic processes. During the isothermal expansion, the working substance absorbs heat from the hot reservoir while doing work on the surroundings. Conversely, during the isothermal compression, the working substance releases heat to the cold reservoir.The beauty of the reversible cycle lies in its ability to restore the original state of the system after completing the cycle. This means that if we were to run the cycle in reverse, the system would return to its initial conditions without any net change in the environment. This property highlights the concept of equilibrium, where the system remains in a state of balance throughout the process.However, it is essential to note that real-world processes are never perfectly reversible. In reality, there are always some irreversible factors such as friction, turbulence, and heat losses that prevent a system from achieving true reversibility. These factors lead to entropy generation, which is a measure of disorder in a system. The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time, emphasizing that natural processes tend to move towards a state of greater disorder.Despite the inherent irreversibility of real processes, the reversible cycle serves as an important benchmark for evaluating the performance of actual engines and refrigerators. By comparing the efficiency of real devices to that of an ideal reversible cycle, engineers can identify areas for improvement and develop more efficient technologies. For instance, the efficiency of a real heat engine can be expressed as a percentage of the maximum efficiency defined by the Carnot cycle, allowing for a better understanding of how close a system operates to its theoretical limits.In conclusion, the idea of a reversible cycle is pivotal in thermodynamics and helps us grasp the principles governing energy conversion processes. While no real process can achieve perfect reversibility, the reversible cycle provides a valuable framework for analyzing and improving the efficiency of various systems. Understanding this concept not only enhances our knowledge of physical laws but also inspires innovation in technology aimed at harnessing energy more effectively and sustainably.

可逆循环的概念在热力学中是基础性的，并在理解能量转化方面发挥着至关重要的作用。可逆循环指的是一种热力学过程，可以在不对系统或其周围环境造成任何变化的情况下被逆转。这种理想化的过程之所以重要，是因为它使科学家和工程师能够分析发动机和冰箱的效率，并理解热力学定律所施加的限制。在可逆循环中，系统经历一系列可以逐步逆转的过程。例如，考虑卡诺循环，这是一种理论模型，展示了在两个热储之间运行的热机的最大可能效率。卡诺循环由四个不同的过程组成：两个等温过程和两个绝热过程。在等温膨胀过程中，工作物质从热储中吸收热量，同时对周围环境做功。相反，在等温压缩过程中，工作物质向冷储释放热量。可逆循环的美在于它能够在完成循环后恢复系统的原始状态。这意味着如果我们以相反的方式运行该循环，系统将返回到其初始条件，而环境没有任何净变化。这一特性突显了平衡的概念，在整个过程中系统保持平衡状态。然而，必须注意的是，现实世界的过程永远不会是完全的可逆。实际上，总是存在一些不可逆因素，如摩擦、湍流和热损失，这些因素阻止了系统实现真正的可逆性。这些因素导致熵的产生，熵是系统中无序程度的度量。热力学第二定律指出，孤立系统的总熵随时间推移永远不会减少，强调自然过程趋向于更大无序状态。尽管现实过程固有地不可逆，但可逆循环作为评估实际发动机和冰箱性能的重要基准。通过将实际设备的效率与理想的可逆循环效率进行比较，工程师可以识别改进的领域，并开发更高效的技术。例如，实际热机的效率可以表示为相对于卡诺循环定义的最大效率的百分比，从而更好地理解一个系统在理论极限附近的运行情况。总之，可逆循环的概念在热力学中至关重要，有助于我们掌握支配能量转换过程的原则。虽然没有真实过程能够实现完美的可逆性，但可逆循环提供了一个有价值的框架，用于分析和改善各种系统的效率。理解这一概念不仅增强了我们对物理法则的认识，也激励了旨在更有效和可持续地利用能源的技术创新。