calorific value

简明释义

发热值

英英释义

例句

1.The calorific value of natural gas is higher than that of coal.

天然气的热值高于煤炭。

2.When choosing fuels for a power plant, the calorific value is a crucial factor.

在为发电厂选择燃料时，热值是一个关键因素。

3.Higher calorific value means more energy can be obtained from a given mass of fuel.

更高的热值意味着可以从给定质量的燃料中获得更多的能量。

4.Different types of wood have varying calorific values, affecting their suitability for burning.

不同类型的木材有不同的热值，影响其燃烧的适用性。

5.To optimize combustion efficiency, we need to measure the calorific value of the biomass.

为了优化燃烧效率，我们需要测量生物质的热值。

作文

The concept of calorific value is fundamental in the fields of chemistry and environmental science. It refers to the amount of energy that can be obtained from a substance when it is completely burned. This measurement is crucial for understanding how different fuels can be utilized efficiently. For instance, when we compare various fuels such as coal, natural gas, and gasoline, each has a distinct calorific value, which determines its effectiveness as an energy source. Higher calorific values indicate that a fuel can produce more energy per unit mass, making it more desirable for energy production.In practical applications, the calorific value plays a significant role in energy policy and economic planning. Countries rich in fossil fuels often prioritize the extraction and exportation of these resources due to their high calorific values. This leads to economic growth and energy security, as nations can rely on these fuels to meet their energy demands. For example, countries like Saudi Arabia and Russia benefit immensely from their oil reserves, which possess high calorific values, allowing them to dominate the global energy market.Furthermore, understanding the calorific value of different materials also aids in environmental conservation efforts. Renewable energy sources, such as biomass and biofuels, are often compared to traditional fossil fuels based on their calorific values. By analyzing these values, scientists can determine the feasibility of using alternative fuels, which may have lower calorific values but offer sustainable and eco-friendly options. For instance, while wood has a lower calorific value than coal, it is renewable and can be sustainably managed, making it an attractive option for reducing carbon emissions.Moreover, in the context of cooking and nutrition, the calorific value of food items is essential for maintaining a balanced diet. Each food item has a specific calorific value that indicates the amount of energy it provides when consumed. This information helps individuals make informed dietary choices, ensuring they consume adequate energy for their daily activities. For example, foods high in carbohydrates, like rice and pasta, typically have higher calorific values than fruits and vegetables. Understanding these differences allows people to tailor their diets according to their energy needs.In conclusion, the calorific value is a vital concept that intersects various fields, from energy production to nutrition and environmental science. By understanding the calorific value of different substances, we can make better decisions regarding energy consumption, environmental sustainability, and personal health. As the world continues to seek efficient and sustainable energy solutions, the importance of calorific value will only grow, shaping our future energy policies and dietary habits.

‘热值’这一概念在化学和环境科学领域至关重要。它指的是当某种物质完全燃烧时可以获得的能量量。这一测量对于理解不同燃料如何被有效利用至关重要。例如，当我们比较煤、天然气和汽油等各种燃料时，每种燃料都有其独特的‘热值’，这决定了它作为能源来源的有效性。较高的‘热值’表明一种燃料每单位质量能产生更多的能量，使其在能源生产中更具吸引力。在实际应用中，‘热值’在能源政策和经济规划中发挥着重要作用。富含化石燃料的国家通常优先考虑这些资源的开采和出口，因为它们的‘热值’较高。这导致经济增长和能源安全，因为国家可以依赖这些燃料来满足其能源需求。例如，沙特阿拉伯和俄罗斯等国从其石油储备中获益匪浅，这些储备具有高‘热值’，使它们在全球能源市场中占据主导地位。此外，了解不同材料的‘热值’还有助于环境保护工作。可再生能源，如生物质和生物燃料，通常根据其‘热值’与传统化石燃料进行比较。通过分析这些值，科学家可以确定使用替代燃料的可行性，尽管这些燃料可能具有较低的‘热值’，但提供可持续和环保的选择。例如，虽然木材的‘热值’低于煤，但它是可再生的，可以可持续管理，因此成为减少碳排放的有吸引力的选择。此外，在烹饪和营养的背景下，食品的‘热值’对于维持均衡饮食至关重要。每种食品都有特定的‘热值’，指示其在食用时提供的能量量。这些信息帮助个人做出明智的饮食选择，确保他们摄入足够的能量以应对日常活动。例如，高碳水化合物的食物，如米饭和意大利面，通常具有比水果和蔬菜更高的‘热值’。理解这些差异使人们能够根据自己的能量需求调整饮食。总之，‘热值’是一个重要的概念，涉及多个领域，从能源生产到营养和环境科学。通过理解不同物质的‘热值’，我们可以在能源消费、环境可持续性和个人健康方面做出更好的决策。随着世界继续寻求高效和可持续的能源解决方案，‘热值’的重要性只会增加，塑造我们的未来能源政策和饮食习惯。