air change rate

简明释义

换气率

英英释义

例句

1.The air change rate in this laboratory must be maintained at 10 changes per hour to ensure safety.

该实验室的空气更换率必须保持在每小时10次，以确保安全。

2.To ensure good indoor air quality, it's essential to monitor the air change rate in schools.

为了确保良好的室内空气质量，监测学校的空气更换率是至关重要的。

3.A high air change rate can help reduce the concentration of indoor pollutants.

高空气更换率有助于降低室内污染物的浓度。

4.The recommended air change rate for a hospital operating room is typically around 15 to 20 times per hour.

医院手术室推荐的空气更换率通常在每小时15到20次。

5.In residential buildings, the ideal air change rate is usually between 0.35 and 1.0 changes per hour.

在住宅建筑中，理想的空气更换率通常在每小时0.35到1.0次之间。

作文

The concept of air change rate refers to the number of times the air within a defined space is replaced with fresh air in a given period, typically expressed in terms of air changes per hour (ACH). This metric is crucial in various environments, including residential homes, commercial buildings, and industrial facilities, as it directly impacts indoor air quality and overall health. Understanding the air change rate is essential for architects, engineers, and facility managers to create spaces that are not only comfortable but also safe for occupants.In residential settings, a higher air change rate can help reduce indoor pollutants, such as dust, allergens, and volatile organic compounds (VOCs), which can accumulate over time. For instance, kitchens and bathrooms often require a higher air change rate due to the presence of moisture and odors. Proper ventilation in these areas ensures that stale air is expelled and replaced with fresh air, thereby improving the living environment.On the other hand, commercial buildings, such as offices and retail spaces, also benefit from maintaining an appropriate air change rate. A well-ventilated workspace enhances employee productivity and comfort. Studies have shown that workers in environments with optimal air exchange rates report fewer headaches and respiratory issues, resulting in lower absenteeism and higher job satisfaction.In industrial contexts, the air change rate plays a critical role in ensuring safety and compliance with health regulations. Factories that handle hazardous materials or produce fumes must have a specific air change requirement to prevent the buildup of harmful substances. Failure to maintain the appropriate air change rate can lead to serious health risks for workers and potential legal repercussions for employers.Moreover, the air change rate is influenced by various factors, including building design, occupancy levels, and weather conditions. For example, tightly sealed buildings may have lower natural ventilation rates, necessitating mechanical systems to achieve the desired air change rate. Conversely, in older buildings with drafty windows and doors, the air change rate may be naturally high, leading to increased energy costs for heating and cooling.To calculate the air change rate, one must consider the volume of the space and the airflow provided by ventilation systems. The formula used is relatively straightforward: divide the total airflow (in cubic feet per minute) by the volume of the room (in cubic feet) and then multiply by 60 to convert it to air changes per hour. This calculation helps building managers determine if their current ventilation strategies are effective or if adjustments are necessary.In conclusion, the air change rate is a vital parameter in assessing and optimizing indoor air quality across various environments. By understanding and managing this rate effectively, stakeholders can enhance occupant health, comfort, and productivity while also ensuring compliance with safety standards. As we continue to prioritize indoor air quality, particularly in the wake of global health challenges, the importance of the air change rate will only grow in significance. Therefore, investing in proper ventilation systems and regularly monitoring the air change rate should be a top priority for anyone involved in building management or design.

“空气更换率”这一概念指的是在特定时间内，一个定义空间内的空气被新鲜空气替换的次数，通常以每小时更换的空气量（ACH）表示。这个指标在住宅、商业建筑和工业设施等各种环境中至关重要，因为它直接影响室内空气质量和整体健康。理解“空气更换率”对于建筑师、工程师和设施管理者来说是必不可少的，以创造出不仅舒适而且安全的空间。在住宅环境中，较高的“空气更换率”可以帮助减少室内污染物，如灰尘、过敏原和挥发性有机化合物（VOCs），这些物质会随着时间的推移而积累。例如，厨房和浴室通常需要较高的“空气更换率”，因为这些地方存在湿气和气味。适当的通风可以确保陈旧的空气被排出，并用新鲜空气替代，从而改善居住环境。另一方面，商业建筑如办公室和零售空间也受益于维持适当的“空气更换率”。良好的通风工作环境可以提高员工的生产力和舒适度。研究表明，在最佳空气交换率的环境中工作的员工报告的头痛和呼吸问题较少，从而导致缺勤率降低和工作满意度提高。在工业环境中，“空气更换率”在确保安全和遵守健康法规方面扮演着关键角色。处理危险材料或产生烟雾的工厂必须有特定的空气更换要求，以防止有害物质的积聚。如果未能维持适当的“空气更换率”，可能会对工人造成严重健康风险，并给雇主带来潜在的法律后果。此外，“空气更换率”还受到多种因素的影响，包括建筑设计、占用水平和天气条件。例如，密封严实的建筑可能具有较低的自然通风率，因此需要机械系统来实现所需的“空气更换率”。相反，在老旧建筑中，由于窗户和门的缝隙，可能会自然地提高“空气更换率”，导致供暖和制冷的能源成本增加。要计算“空气更换率”，必须考虑空间的体积和通风系统提供的气流。使用的公式相对简单：将总气流（以每分钟立方英尺为单位）除以房间的体积（以立方英尺为单位），然后乘以60以转换为每小时更换的空气量。这个计算帮助建筑管理者确定他们当前的通风策略是否有效，或者是否需要进行调整。总之，“空气更换率”是评估和优化各种环境中室内空气质量的重要参数。通过有效理解和管理这一比率，利益相关者可以提高居住者的健康、舒适度和生产力，同时确保遵守安全标准。随着我们在全球健康挑战之后继续优先考虑室内空气质量，“空气更换率”的重要性只会愈加凸显。因此，投资于适当的通风系统并定期监测“空气更换率”应成为任何参与建筑管理或设计的人的首要任务。