heating value

简明释义

热值

英英释义

例句

1.The heating value of a fuel determines how much energy can be produced when it is burned.

燃料的热值决定了燃烧时可以产生多少能量。

2.The heating 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炭，使其成为更高效的燃料来源。

3.To optimize energy production, we need to select fuels with the highest heating values.

为了优化能源生产，我们需要选择具有最高热值的燃料。

4.When calculating the heating value of biomass, moisture content must be considered.

在计算生物质的热值时，必须考虑水分含量。

5.Different types of wood have varying heating values, which affects their use in fireplaces.

不同种类的木材有不同的热值，这影响了它们在壁炉中的使用。

作文

In today's world, energy efficiency has become a crucial topic as we face the challenges of climate change and dwindling natural resources. One important concept that often comes up in discussions about energy sources is heating value. The heating value (发热值) of a fuel refers to the amount of energy that can be obtained from it when it is burned. This measurement is essential for understanding the efficiency and effectiveness of various fuels used for heating, cooking, and generating electricity.There are two main types of heating value: the higher heating value (HHV) and the lower heating value (LHV). The HHV represents the total amount of heat released when a fuel is combusted, including the heat contained in the water vapor produced during combustion. On the other hand, the LHV excludes the energy contained in the water vapor, which is significant in applications where the water vapor does not condense, such as in many power plants. Understanding the difference between these two values is crucial for engineers and scientists who design energy systems. For instance, using the heating value to compare different fuels can help determine which fuel will provide the most energy for a given application. Natural gas, for example, typically has a high heating value, making it an efficient choice for residential heating and cooking. In contrast, biomass fuels like wood may have a lower heating value, but they can be more sustainable and environmentally friendly.The heating value also plays a significant role in the economic aspects of energy production. Fuels with higher heating values often command higher prices, but they can also lead to lower overall costs in terms of energy output. This relationship between cost and heating value is something that consumers and businesses must consider when choosing their energy sources. Furthermore, government policies and incentives often aim to promote the use of fuels with higher heating values to encourage energy efficiency and reduce carbon emissions.Moreover, the heating value of a fuel can be affected by various factors, including its composition, moisture content, and how it is processed. For instance, coal can have a varying heating value depending on its type; anthracite coal has a much higher heating value than lignite coal. Understanding these variations is vital for industries that rely on consistent energy outputs, such as manufacturing and transportation.In conclusion, the concept of heating value is fundamental to our understanding of energy sources and their efficiency. As we strive to create a more sustainable future, recognizing the importance of heating value will help us make informed decisions about the fuels we use. By prioritizing fuels with higher heating values, we can enhance energy efficiency, reduce costs, and minimize our environmental impact. Ultimately, the way we understand and utilize heating value will play a pivotal role in shaping our energy landscape in the years to come.

在当今世界，能源效率已成为一个关键话题，因为我们面临气候变化和自然资源减少的挑战。一个在讨论能源来源时经常出现的重要概念是发热值。燃料的发热值（heating value）是指燃烧时可以从中获得的能量量。这个测量对于理解用于供暖、烹饪和发电的各种燃料的效率和有效性至关重要。发热值主要有两种类型：高热值（HHV）和低热值（LHV）。HHV表示燃料燃烧时释放的总热量，包括燃烧过程中产生的水蒸气所含的热量。另一方面，LHV不包括水蒸气中的能量，这在许多发电厂等不凝结水蒸气的应用中是显著的。理解这两个值之间的差异对于设计能源系统的工程师和科学家至关重要。例如，利用发热值比较不同燃料可以帮助确定哪种燃料在特定应用中提供最多的能量。例如，天然气通常具有较高的发热值，使其成为住宅供暖和烹饪的高效选择。相比之下，木材等生物质燃料的发热值可能较低，但它们可能更可持续且对环境友好。发热值在能源生产的经济方面也起着重要作用。具有较高发热值的燃料通常价格较高，但它们也可能导致整体能源输出的成本降低。这种成本与发热值之间的关系是消费者和企业在选择能源来源时必须考虑的。此外，政府政策和激励措施通常旨在促进使用具有较高发热值的燃料，以鼓励能源效率并减少碳排放。此外，燃料的发热值还会受到多种因素的影响，包括其成分、湿度和加工方式。例如，煤的发热值可能因其类型而异；无烟煤的发热值远高于褐煤。理解这些变化对于依赖一致能源输出的行业（如制造业和运输业）至关重要。总之，发热值的概念是我们理解能源来源及其效率的基础。随着我们努力创造一个更可持续的未来，认识到发热值的重要性将帮助我们做出关于使用燃料的明智决策。通过优先选择具有较高发热值的燃料，我们可以提高能源效率、降低成本并最小化环境影响。最终，我们对发热值的理解和利用将在未来几年塑造我们的能源格局中发挥关键作用。