closed rankine cycle

简明释义

闭合兰金循环

英英释义

例句

1.Engineers often prefer the closed rankine cycle 闭式朗肯循环 for its ability to maintain high temperatures and pressures.

工程师们常常偏好闭式朗肯循环，因为它能够维持高温和高压。

2.The design of a closed rankine cycle 闭式朗肯循环 system requires careful consideration of heat exchangers.

闭式朗肯循环系统的设计需要仔细考虑热交换器。

3.In power plants, the closed rankine cycle 闭式朗肯循环 is commonly used for converting heat into mechanical energy.

在发电厂中，闭式朗肯循环通常用于将热能转化为机械能。

4.The efficiency of the closed rankine cycle 闭式朗肯循环 is significantly higher than that of an open cycle.

闭式朗肯循环的效率显著高于开放循环。

5.The closed rankine cycle 闭式朗肯循环 operates by recycling the working fluid, which minimizes waste.

闭式朗肯循环通过回收工质来运行，从而最小化废物。

作文

The closed rankine cycle is a thermodynamic cycle that is widely used in power generation and various industrial applications. It operates on the principle of converting heat energy into mechanical work, which is then transformed into electrical energy. Understanding the closed rankine cycle is crucial for engineers and scientists working in the fields of energy production and thermal systems. This cycle consists of four main processes: isentropic compression, isobaric heat addition, isentropic expansion, and isobaric heat rejection.In the first step of the closed rankine cycle, the working fluid, usually water or another suitable fluid, is compressed isentropically by a pump. This process increases the pressure of the fluid without any change in entropy, which means that the temperature of the fluid also rises. The second step involves heating the high-pressure liquid in a boiler at constant pressure, where it absorbs heat from an external source, typically burning fossil fuels or using nuclear reactions. At this stage, the working fluid transforms into steam, which is essential for the next phase of the cycle.Once the steam is generated, it enters the turbine, where it undergoes isentropic expansion. During this process, the steam does work on the turbine blades, causing them to rotate and generate mechanical energy. This mechanical energy is then converted into electrical energy through a generator. After the steam has expanded and done work, it exits the turbine and enters the condenser. In the condenser, the steam releases its heat at constant pressure, resulting in condensation back into a liquid state. This is the final step of the closed rankine cycle, where the working fluid is cooled down and prepared to be pumped back into the system.The efficiency of the closed rankine cycle can be influenced by several factors, including the temperature and pressure of the heat source, the properties of the working fluid, and the design of the components involved in the cycle. One of the key advantages of this cycle is its ability to operate with a variety of heat sources, making it highly adaptable to different energy scenarios. For instance, it can be utilized in geothermal power plants, waste heat recovery systems, and even solar thermal energy systems.Moreover, advancements in technology have led to the development of supercritical and regenerative closed rankine cycles, which enhance the overall efficiency of the cycle. Supercritical cycles operate at pressures above the critical point of the working fluid, allowing for higher thermal efficiencies. Regenerative cycles, on the other hand, utilize a portion of the exhaust heat to preheat the working fluid before it enters the boiler, further improving efficiency.In conclusion, the closed rankine cycle is a vital component of modern energy systems, providing a reliable method for converting thermal energy into usable power. Its versatility and efficiency make it a preferred choice in various applications, from traditional power plants to innovative renewable energy systems. As the world continues to seek sustainable energy solutions, understanding and optimizing the closed rankine cycle will remain essential for engineers and researchers alike.

闭式朗肯循环是一种广泛应用于发电和各种工业应用的热力学循环。它基于将热能转化为机械功的原理，然后将其转化为电能。理解闭式朗肯循环对在能源生产和热系统领域工作的工程师和科学家至关重要。该循环由四个主要过程组成：绝热压缩、等压加热、绝热膨胀和等压冷却。在闭式朗肯循环的第一步中，工作流体通常是水或其他合适的流体，通过泵进行绝热压缩。这个过程在没有熵变化的情况下增加了流体的压力，这意味着流体的温度也会上升。第二步涉及在锅炉中以恒定压力加热高压液体，在此过程中，它从外部热源吸收热量，通常是燃烧化石燃料或使用核反应。在这一阶段，工作流体转变为蒸汽，这对于循环的下一阶段至关重要。一旦蒸汽生成，它就进入涡轮机，在那里它经历绝热膨胀。在这个过程中，蒸汽对涡轮叶片做功，使其旋转并产生机械能。然后，这种机械能通过发电机转化为电能。在蒸汽膨胀并做功后，它离开涡轮机并进入冷凝器。在冷凝器中，蒸汽在恒定压力下释放其热量，导致重新凝结成液态。这是闭式朗肯循环的最后一步，工作流体被冷却并准备再次被泵送回系统。闭式朗肯循环的效率受多种因素的影响，包括热源的温度和压力、工作流体的性质以及循环中各部件的设计。该循环的一个主要优点是它能够与多种热源一起运行，使其在不同的能源场景中高度适应。例如，它可以用于地热发电厂、废热回收系统，甚至太阳能热能系统。此外，技术的进步导致了超临界和再生闭式朗肯循环的发展，这提高了循环的整体效率。超临界循环在工作流体的临界点以上的压力下运行，从而实现更高的热效率。另一方面，再生循环利用一部分废气热量在工作流体进入锅炉之前进行预热，进一步提高了效率。总之，闭式朗肯循环是现代能源系统的重要组成部分，提供了一种可靠的方法来将热能转化为可用的电力。它的多功能性和效率使其成为传统发电厂到创新可再生能源系统中首选的选择。随着世界继续寻求可持续能源解决方案，理解和优化闭式朗肯循环对工程师和研究人员来说仍然至关重要。