calorific value

简明释义

热值

英英释义

例句

1.When comparing fuels, it's essential to consider the calorific value to determine which one provides more energy.

在比较燃料时，考虑热值是确定哪种燃料提供更多能量的关键。

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

天然气的热值高于煤炭，使其成为更高效的能源来源。

3.We need to calculate the calorific value of this biomass to assess its potential as a fuel source.

我们需要计算这种生物质的热值以评估其作为燃料来源的潜力。

4.Higher calorific value fuels are typically more expensive but offer better performance.

热值更高的燃料通常价格更贵，但性能更佳。

5.The calorific value of wood varies depending on its moisture content.

木材的热值因其水分含量而异。

作文

The concept of calorific value is essential in the field of energy and nutrition. It refers to the amount of energy that can be obtained from a fuel or food when it is completely burned or metabolized. Understanding calorific value helps us make informed decisions about our energy consumption and dietary choices. For instance, in the context of fuels, different materials have varying calorific values, which directly affects their efficiency and suitability for specific applications. High calorific value fuels, such as natural gas and gasoline, provide more energy per unit compared to lower calorific value sources like wood or coal. This means that when selecting a fuel for heating or transportation, one must consider the calorific value to ensure optimal performance and lower emissions.In the realm of nutrition, calorific value plays a crucial role in determining the energy content of foods. Each food item has a specific calorific value, which indicates how much energy it can provide to the body when consumed. For example, carbohydrates and proteins typically have around 4 calories per gram, while fats contain about 9 calories per gram. This difference in calorific value explains why high-fat foods are often more energy-dense and can contribute to weight gain if consumed in excess.Moreover, understanding calorific value is vital for individuals who are trying to manage their weight or improve their overall health. By being aware of the calorific value of various foods, one can make better dietary choices that align with their health goals. For instance, someone aiming to lose weight may choose to consume foods with lower calorific values while ensuring they still receive adequate nutrition. On the other hand, athletes or individuals with high physical activity levels may seek out foods with higher calorific values to fuel their energy needs.In conclusion, the importance of calorific value cannot be overstated, whether in the context of fuels or nutrition. It serves as a fundamental measure of energy content, guiding both energy production and dietary choices. As we continue to face challenges related to energy sustainability and health, a deeper understanding of calorific value will be crucial in making informed decisions that benefit both ourselves and the environment.

‘热值’这一概念在能源和营养领域中至关重要。它指的是从燃料或食物中获得的能量量，当它被完全燃烧或代谢时。理解‘热值’有助于我们在能量消费和饮食选择方面做出明智的决定。例如，在燃料的背景下，不同材料具有不同的‘热值’，这直接影响其效率和适用性。高‘热值’燃料，如天然气和汽油，每单位提供的能量比木材或煤等低‘热值’来源要多。这意味着在选择供暖或交通的燃料时，必须考虑‘热值’，以确保最佳性能和较低的排放。在营养领域，‘热值’在确定食物的能量含量方面起着至关重要的作用。每种食物都有特定的‘热值’，这表明当摄入时它能为身体提供多少能量。例如，碳水化合物和蛋白质通常每克约含4卡路里，而脂肪每克约含9卡路里。这种‘热值’的差异解释了为何高脂肪食物通常能量密度更高，如果过量摄入会导致体重增加。此外，理解‘热值’对那些试图控制体重或改善整体健康的人尤为重要。通过了解各种食物的‘热值’，人们可以做出更好的饮食选择，以符合他们的健康目标。例如，旨在减肥的人可能会选择摄入‘热值’较低的食物，同时确保仍然获得足够的营养。另一方面，运动员或身体活动水平较高的人可能会寻求‘热值’较高的食物来满足他们的能量需求。总之，‘热值’的重要性不可小觑，无论是在燃料还是营养的背景下。它作为能量含量的基本衡量标准，引导着能源生产和饮食选择。随着我们继续面临与能源可持续性和健康相关的挑战，更深入地理解‘热值’对于做出有益于我们自身和环境的明智决定至关重要。