non-reversible engine

简明释义

不可逆转式发动机不能逆转发动机

英英释义

例句

1.Understanding the limitations of a non-reversible engine 不可逆发动机 can help engineers design more efficient systems.

了解不可逆发动机的局限性可以帮助工程师设计更高效的系统。

2.In thermodynamics, a non-reversible engine 不可逆发动机 is one that cannot return to its initial state without external work.

在热力学中，不可逆发动机是指无法在没有外部工作的情况下返回到初始状态的发动机。

3.The efficiency of a non-reversible engine 不可逆发动机 is always less than that of a reversible engine due to unavoidable losses.

由于不可避免的损失，不可逆发动机的效率总是低于可逆发动机的效率。

4.A typical example of a non-reversible engine is a steam engine, which converts thermal energy into mechanical work but cannot operate in reverse.

一个典型的不可逆发动机例子是蒸汽机，它将热能转化为机械功，但无法反向操作。

5.An internal combustion engine is often classified as a non-reversible engine 不可逆发动机 because it cannot efficiently convert mechanical work back into fuel.

内燃机通常被归类为不可逆发动机，因为它无法有效地将机械功转化回燃料。

作文

In the realm of thermodynamics, engines play a crucial role in converting energy from one form to another. Among these engines, there exists a category known as a non-reversible engine, which has significant implications for energy efficiency and the laws of thermodynamics. A non-reversible engine (不可逆发动机) is defined as a system that cannot return to its initial state after performing work. This characteristic sets it apart from reversible engines, which can operate in both directions without any loss of energy or increase in entropy.The concept of a non-reversible engine is vital to understanding how energy transformations occur in real-world applications. For instance, when we consider an internal combustion engine in a car, it operates on the principle of converting chemical energy from fuel into mechanical energy. However, this process is inherently inefficient due to the generation of waste heat and other losses, making it a prime example of a non-reversible engine (不可逆发动机). The irreversibility arises from friction, turbulence, and other dissipative forces that prevent the engine from returning to its original state.One of the key factors contributing to the non-reversibility of such engines is the second law of thermodynamics. This law states that in any energy transfer, the total entropy of a closed system will always increase over time. As a result, when a non-reversible engine performs work, it generates entropy, which signifies the dispersal of energy and the loss of usable energy. In practical terms, this means that not all the energy input into the system can be converted into useful work, leading to inefficiencies and energy losses.The implications of non-reversible engines extend beyond individual machines; they also influence broader systems, such as power plants and refrigeration units. For example, coal-fired power plants operate as non-reversible engines (不可逆发动机) because they convert thermal energy from burning coal into electricity. However, a significant portion of the thermal energy is lost as waste heat, which cannot be reused in the system. This inefficiency highlights the importance of improving energy conversion processes to minimize losses and enhance sustainability.Moreover, the study of non-reversible engines has led to advancements in engineering and technology. Researchers and engineers strive to develop more efficient systems that can reduce the effects of irreversibility. Innovations such as combined-cycle power plants and regenerative braking systems are examples of how we can mitigate the impacts of non-reversible engines (不可逆发动机) by capturing and reusing waste energy.In conclusion, understanding the nature of non-reversible engines is essential in the field of thermodynamics and energy conversion. These engines illustrate the limitations imposed by the second law of thermodynamics, emphasizing the challenges of achieving 100% efficiency in energy transformation. By acknowledging the characteristics of non-reversible engines (不可逆发动机), we can better appreciate the need for ongoing research and development aimed at improving energy efficiency and sustainability in our technological systems.