lower heat of combustion

简明释义

燃烧低热值

英英释义

例句

1.The lower heat of combustion of certain plastics can lead to increased safety in fire situations.

某些塑料的低燃烧热在火灾情况下可以提高安全性。

2.The lower heat of combustion of ethanol makes it a less efficient fuel compared to gasoline.

乙醇的低燃烧热使其相比汽油效率较低。

3.The lower heat of combustion of natural gas is advantageous for reducing greenhouse gas emissions.

天然气的低燃烧热有助于减少温室气体排放。

4.Understanding the lower heat of combustion is crucial for optimizing engine performance.

理解低燃烧热对于优化发动机性能至关重要。

5.When evaluating biofuels, we often consider their lower heat of combustion to determine viability.

在评估生物燃料时，我们常常考虑它们的低燃烧热以确定可行性。

作文

The concept of energy is fundamental to our understanding of the physical world, and one of the most important aspects of energy is its conversion during chemical reactions. When we think about fuels and their efficiency, we often encounter terms like 'heat of combustion.' Specifically, the term lower heat of combustion refers to the amount of energy released when a substance is burned under specific conditions, typically at constant pressure, but it assumes that the water produced in the reaction remains in the vapor state. This concept is crucial for various applications, including power generation, heating, and even internal combustion engines.To grasp the significance of lower heat of combustion, it is essential to differentiate it from the higher heat of combustion. While the higher heat of combustion involves the total energy released when water vapor condenses into liquid, the lower heat of combustion provides a more conservative estimate of energy output. This distinction is particularly relevant in scenarios where water remains as vapor, such as in certain industrial processes or in the combustion of gaseous fuels.In practical terms, fuels with a low lower heat of combustion may not be as efficient for energy production compared to those with a higher value. For example, natural gas has a higher lower heat of combustion than coal, making it a more favorable option for electricity generation in many settings. Understanding these values allows engineers and scientists to optimize fuel choices based on their specific energy requirements and environmental impact.Moreover, the lower heat of combustion can also influence the design of combustion systems. For instance, if a fuel has a low lower heat of combustion, it may require a larger volume to produce the same amount of energy as a fuel with a higher value. This can lead to increased costs and logistical challenges in the transportation and storage of fuels.In addition to its implications for energy production, the lower heat of combustion has significant environmental considerations. Fuels that produce less energy per unit mass may lead to higher emissions of pollutants per unit of energy generated, which raises concerns about air quality and climate change. Therefore, understanding the lower heat of combustion is not only a matter of efficiency but also one of sustainability.In conclusion, the term lower heat of combustion plays a vital role in the fields of chemistry and engineering, influencing decisions related to fuel selection, system design, and environmental impact. By comprehensively understanding this concept, we can make informed choices that enhance energy efficiency while minimizing negative effects on our planet. As we continue to explore alternative energy sources and strive for more sustainable practices, the importance of the lower heat of combustion will undoubtedly remain a critical area of focus.

能量的概念是我们理解物理世界的基础，而能量转化在化学反应中尤为重要。当我们考虑燃料及其效率时，常常会遇到“燃烧热”这样的术语。具体来说，lower heat of combustion（低燃烧热）指的是在特定条件下（通常是在恒压下）燃烧物质时释放的能量量，但假设反应中产生的水保持在气态。这一概念对于发电、供热甚至内燃机等各种应用至关重要。要理解lower heat of combustion的重要性，必须将其与高燃烧热区分开来。高燃烧热涉及水蒸气凝结成液体时释放的总能量，而低燃烧热则提供了更保守的能量输出估计。这一区别在某些工业过程或气体燃料的燃烧中尤为相关，因为水仍以蒸气形式存在。在实际应用中，具有较低lower heat of combustion的燃料可能在能源生产方面不如那些具有较高值的燃料高效。例如，天然气的lower heat of combustion高于煤，因此在许多情况下，它成为发电的更有利选择。理解这些数值使工程师和科学家能够根据特定的能源需求和环境影响优化燃料选择。此外，lower heat of combustion也会影响燃烧系统的设计。例如，如果一种燃料的lower heat of combustion较低，则可能需要更大的体积才能产生与高值燃料相同的能量。这可能导致成本增加和燃料运输、储存方面的后勤挑战。除了对能源生产的影响外，lower heat of combustion还有重要的环境考量。每单位质量产生的能量较少的燃料，可能导致每单位产生的能量排放更多的污染物，从而引发空气质量和气候变化方面的担忧。因此，理解lower heat of combustion不仅是效率问题，也是可持续性的问题。总之，lower heat of combustion这一术语在化学和工程领域中起着至关重要的作用，影响着与燃料选择、系统设计和环境影响相关的决策。通过全面理解这一概念，我们可以做出明智的选择，提高能源效率，同时最小化对地球的负面影响。随着我们继续探索替代能源并努力实现更可持续的做法，lower heat of combustion的重要性无疑将继续成为关注的关键领域。