Scalable method to assess ventilation rates in dwellings

评估住宅通风率的可扩展方法

• 批准号: 2239060
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2239060
• 关键词: Scalable; method; assess; ventilation; rates

TKnowledge of air exchange rates in existing buildings is increasingly important, especially in the context of retrofit. Retrofit interventions to improve the energy efficiency of a dwelling will most likely lead to a reduction in air exchange through infiltration, and it is important to ensure that this does not negatively impact the overall background ventilation rate in the building.There are many established techniques for measuring and characterising air exchange rates in buildings. Despite this, there is currently very little data available regarding ventilation rates of existing dwellings in the UK. This is partly due to the complexity and cost of deploying established techniques, e.g. tracer gases, at scale.However, through the increasing uptake of smart thermostats it is likely that temperature and humidity data will be available for large numbers of dwellings in the future. This project aims to explore how this data can be used to estimate ventilation rate. Provided both internal and external hygrothermal conditions are recorded, the resulting vapour pressure excess, i.e. moisture content rise above external levels, can be derived. Since vapour pressure excess is effectively a function of internal moisture generation and ventilation effectiveness, estimates of ventilation rate can theoretically be made using vapour pressure excess.

了解现有建筑物的空气交换率越来越重要，特别是在改造的情况下。为提高住宅的能源效率而进行的改造措施很可能会导致渗透导致的空气交换减少，因此必须确保这不会对建筑物的整体背景通风率产生负面影响。有许多成熟的技术可以测量和表征建筑物中的空气交换率。尽管如此，目前有关英国现有住宅通风率的数据很少。这部分是由于大规模部署现有技术（如示踪气体）的复杂性和成本。然而，随着智能恒温器的日益普及，未来可能会为大量住宅提供温度和湿度数据。本项目旨在探索如何使用这些数据来估计通风率。只要记录了内部和外部的湿热条件，就可以得出由此产生的蒸汽压力过剩，即水分含量高于外部水平。由于蒸汽压力过量是有效的内部水分生成和通风效率的函数，理论上可以使用蒸汽压力过量来估计通风率。