specific energy

简明释义

能量率

英英释义

例句

1.Higher specific energy 比能量 means longer run times for electric vehicles.

更高的specific energy 比能量 意味着电动车更长的运行时间。

2.The battery's specific energy 比能量 is crucial for determining how long it can power a device.

电池的specific energy 比能量 对于确定它可以为设备供电多久至关重要。

3.When comparing batteries, the specific energy 比能量 is a key factor to consider.

在比较电池时，specific energy 比能量 是一个关键因素。

4.The specific energy 比能量 of this material makes it ideal for lightweight applications in aerospace.

这种材料的specific energy 比能量 使其非常适合航空航天领域的轻量化应用。

5.Engineers are always looking to improve the specific energy 比能量 of fuel cells to enhance their efficiency.

工程师们总是希望提高燃料电池的specific energy 比能量 以提高其效率。

作文

In the field of physics and engineering, the term specific energy refers to the amount of energy per unit mass of a substance or system. This concept is crucial in various applications, particularly in energy storage and conversion technologies. To better understand the significance of specific energy, we can explore its implications in batteries, fuels, and even food. Firstly, let us consider batteries, which are a vital component of modern technology. The specific energy of a battery determines how much energy it can store relative to its weight. For instance, lithium-ion batteries, widely used in smartphones and electric vehicles, have a high specific energy. This means they can store more energy without adding excessive weight, making them ideal for portable electronics and electric cars. In contrast, lead-acid batteries have a lower specific energy, which limits their use in applications where weight is a critical factor. As technology advances, researchers are continually striving to develop batteries with higher specific energy, which would enhance the performance and range of electric vehicles. Secondly, when we examine fuels, the specific energy plays a significant role in determining their efficiency and suitability for various applications. For example, gasoline has a higher specific energy compared to ethanol, which means that gasoline can provide more energy per unit mass. This is one reason why gasoline-powered vehicles tend to have a longer range than those powered by ethanol. However, as environmental concerns rise, there is a growing interest in biofuels and alternative energy sources, which often have different specific energy characteristics. Understanding these differences is essential for developing sustainable energy solutions. Moreover, the concept of specific energy is not limited to mechanical systems but also applies to biological systems. For instance, when considering the specific energy of food, we can evaluate how much energy our bodies obtain from different types of food relative to their mass. Foods high in fat, such as nuts and oils, have a greater specific energy than carbohydrates or proteins. This understanding can help individuals make informed dietary choices based on their energy needs. In conclusion, the concept of specific energy is a fundamental aspect of both physical and biological systems. It helps us understand the efficiency and practicality of various energy sources, whether they be in batteries, fuels, or food. As we continue to innovate and seek out more efficient energy solutions, grasping the implications of specific energy will be essential for scientists, engineers, and consumers alike. By focusing on improving specific energy across different applications, we can pave the way for a more sustainable and energy-efficient future.

在物理和工程领域，术语比能量指的是物质或系统单位质量的能量。这个概念在各种应用中至关重要，特别是在能源存储和转换技术中。为了更好地理解比能量的重要性，我们可以探讨其在电池、燃料甚至食物中的影响。首先，让我们考虑电池，它们是现代技术的重要组成部分。电池的比能量决定了它相对于其重量能够储存多少能量。例如，锂离子电池广泛用于智能手机和电动汽车，具有较高的比能量。这意味着它们可以在不增加过多重量的情况下储存更多能量，使其非常适合便携式电子设备和电动汽车。相比之下，铅酸电池的比能量较低，这限制了它们在重量至关重要的应用中的使用。随着技术的进步，研究人员不断努力开发具有更高比能量的电池，从而提高电动汽车的性能和续航能力。其次，当我们检查燃料时，比能量在确定其效率和适用性方面发挥着重要作用。例如，汽油的比能量比乙醇高，这意味着汽油每单位质量能提供更多能量。这也是为什么汽油动力的车辆通常比乙醇动力的车辆具有更长续航里程的原因。然而，随着环境问题的上升，越来越多的人对生物燃料和替代能源来源产生兴趣，而这些能源通常具有不同的比能量特性。理解这些差异对于开发可持续能源解决方案至关重要。此外，比能量的概念不仅限于机械系统，还适用于生物系统。例如，在考虑食物的比能量时，我们可以评估我们的身体从不同类型食物中获得的能量相对于其质量的多少。富含脂肪的食物，如坚果和油，其比能量高于碳水化合物或蛋白质。这种理解可以帮助个人根据自身的能量需求做出明智的饮食选择。总之，比能量的概念是物理和生物系统的基本方面。它帮助我们理解各种能源的效率和实用性，无论是在电池、燃料还是食物中。随着我们继续创新并寻求更高效的能源解决方案，掌握比能量的含义对于科学家、工程师和消费者来说都是至关重要的。通过关注提高不同应用中的比能量，我们可以为一个更加可持续和节能的未来铺平道路。