calorific value

简明释义

1. 发热量; 2. 热值; 3. 卡值; 4. 卡路里值;

英英释义

例句

1.Biofuels often have a lower calorific value compared to fossil fuels, which can affect energy output.

生物燃料的热值通常低于化石燃料，这可能影响能量输出。

2.Engine efficiency can be improved by using fuels with a higher calorific value.

使用热值更高的燃料可以提高发动机效率。

3.The calorific value of natural gas is higher than that of coal, making it a more efficient fuel source.

天然气的热值高于煤，因此它是一种更高效的燃料来源。

4.When choosing a fuel for heating, consider the calorific value to ensure maximum efficiency.

在选择供暖燃料时，要考虑其热值以确保最大效率。

5.The calorific value of wood varies depending on the type of tree and its moisture content.

木材的热值因树种和含水量而异。

作文

Understanding the concept of calorific value is essential for many fields, including nutrition, energy production, and environmental science. The term calorific value refers to the amount of energy that can be obtained from a substance when it is burned. This measurement is crucial because it helps us determine how much energy we can derive from various fuels and food sources. In the context of food, the calorific value indicates how much energy is available to our bodies when we consume a particular item. Different foods have different calorific values, which means some provide more energy than others. For instance, fats typically have a higher calorific value compared to carbohydrates and proteins. This is why high-fat foods can contribute to weight gain if consumed in excess, as they deliver more energy per gram.In energy production, understanding the calorific value of fuels is vital for efficiency. For example, coal, natural gas, and oil all have varying calorific values, which affects how much energy can be produced from each type. Power plants often choose fuels based on their calorific value to maximize output while minimizing costs. Higher calorific value fuels can produce more energy with less material, making them more desirable for energy generation.Moreover, the calorific value plays a significant role in environmental considerations. Fuels with higher calorific values tend to produce more energy but can also lead to higher emissions of greenhouse gases if not managed properly. Therefore, transitioning to renewable energy sources with lower calorific values might help reduce carbon footprints while still meeting energy demands. Understanding the calorific value of different materials allows scientists and policymakers to make informed decisions about energy use and conservation.In conclusion, the concept of calorific value is multifaceted and impacts various aspects of our lives, from our dietary choices to global energy policies. By grasping the significance of calorific value, individuals can make better-informed decisions about their health and the environment. Whether we are choosing foods that fuel our bodies or selecting energy sources that power our homes, the calorific value remains a fundamental aspect that should not be overlooked.

理解热值的概念对于许多领域至关重要，包括营养学、能源生产和环境科学。术语热值指的是在燃烧某种物质时可以获得的能量量。这一测量至关重要，因为它帮助我们确定从各种燃料和食物来源中可以提取多少能量。在食品的背景下，热值表示我们在消费特定食物时身体可获得多少能量。不同的食物具有不同的热值，这意味着有些提供的能量比其他食物更多。例如，脂肪通常具有比碳水化合物和蛋白质更高的热值。这就是为什么高脂肪食物如果过量消费会导致体重增加，因为它们每克提供的能量更多。在能源生产中，了解燃料的热值对于效率至关重要。例如，煤、天然气和石油的热值各不相同，这影响了每种燃料可以产生多少能量。发电厂通常根据其热值选择燃料，以最大化产出并最小化成本。热值较高的燃料可以用更少的材料产生更多的能量，使其在能源生产中更具吸引力。此外，热值在环境考虑中也发挥着重要作用。热值较高的燃料通常产生更多的能量，但如果管理不当，也可能导致温室气体排放增加。因此，转向热值较低的可再生能源可能有助于减少碳足迹，同时满足能源需求。了解不同材料的热值使科学家和政策制定者能够就能源使用和保护做出明智的决策。总之，热值的概念是多方面的，影响着我们生活的各个方面，从饮食选择到全球能源政策。通过掌握热值的重要性，个人可以在健康和环境方面做出更明智的决策。无论我们是在选择为身体提供能量的食物，还是选择为家庭供电的能源来源，热值都是一个不容忽视的基本方面。