A review of indoor Gaseous organic compounds and human chemical Exposure: Insights from Real-time measurements

Environment International, Год журнала: 2022, Номер 170, С. 107611 - 107611

Опубликована: Ноя. 1, 2022

Gaseous organic compounds, mainly volatile compounds (VOCs), have become a wide concern in various indoor environments where we spend the majority of our daily time. The sources, compositions, variations, and sinks VOCs are extremely complex, their potential impacts on human health less understood. Owing to deployment state-of-the-art real-time mass spectrometry during last two decades, understanding dynamic changes chemical transformations indoors has been significantly improved. This review aims summarize key findings from measurements recent studies including residence, classroom, office, sports center, etc. sources sinks, compositions distributions VOCs, factors (e.g., activities, air exchange rate, temperature humidity) driving discussed. physical processes gas-particle partitioning secondary oxidation summarized. Finally, recommendations for future research directions chemistry proposed.

Язык: Английский

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Impact of Climate Change on Indoor Air Quality: A Review

International Journal of Environmental Research and Public Health, Год журнала: 2022, Номер 19(23), С. 15616 - 15616

Опубликована: Ноя. 24, 2022

Climate change can affect the indoor environment due to heat and mass transfers between outdoor environments. To mitigate climate impacts adapt buildings changing environment, changes in building characteristics occupants’ behavior may occur. characterize effects of on air quality (IAQ), present review focused four aspects: (1) experimental modeling studies that relate IAQ future environmental conditions, (2) evolution concentrations coming years with regard temperature rise, (3) mitigation adaptation actions sector, (4) human context change. In pollutants highlighted a combined effect relative humidity pollutant emissions from sources. Five models developed for data were identified literature. increasing ambient lead directly or indirectly ozone, particle, nitrogen oxides, volatile organic compound some regions world depending assumptions made about evolution, anthropogenic emissions, regional regulation. Infiltration into is governed by many factors, including difference indoors outdoors, might increase come during summer decrease other seasons. On hand, codes countries require higher airtightness new retrofitted buildings. The include reinforcement insulation, implementation materials smart technologies, more systematic possibly longer use conditioning systems compared nowadays. Moreover, warmer winters, springs, autumns induce an duration open windows these seasons, while reduce windows.

Язык: Английский

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A comprehensive review of phase change material-based wearable devices for personal thermal management: Mechanism, location and application functionality

Applied Thermal Engineering, Год журнала: 2024, Номер unknown, С. 124416 - 124416

Опубликована: Сен. 1, 2024

Язык: Английский

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The Impact of Indoor Environments on the Abundance of Urban Outdoor VOCs

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

With the upcoming transition to clean electric vehicles, sources of volatile organic compounds (VOCs) in ambient environment are rapidly changing and highly uncertain. Here, through systematic characterization emissions from a typical apartment Chinese megacity (Shenzhen), we show that indoor environments contribute significantly levels (i.e., outdoor) VOCs. In particular, observe majority VOCs originate unoccupied spaces, demonstrating temperature-dependent release surface reservoirs. The total indoor-to-outdoor VOC emission rates varied 53 2300 mg day–1 (median 230 day–1) during periods, influenced by both air exchange rate temperature. Reanalysis literature data various building studies worldwide corroborates our findings reveals scale with room volume, an average 0.33 ± 0.03 h–1 m–3. Our study implies urban levels, rivaling traditional sources, e.g., power generation biomass burning. This is particularly true for oxygenated VOCs, such as methanol, amounting ∼60% transportation emissions. change understanding role contributions outdoor quality, whose importance will increase controls on industrial intensify.

Язык: Английский

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Quanta emission rate during speaking and coughing mediated by indoor temperature and humidity

Environment International, Год журнала: 2025, Номер unknown, С. 109379 - 109379

Опубликована: Март 1, 2025

In epidemiological prospective modelling, assessing the hypothetical infectious quanta emission rate (Eq) is critical for estimating airborne infection risk. Existing Eq models overlook environmental factors such as indoor relative humidity (RH) and temperature (T), despite their importance to droplet evaporation dynamics. Here we include these in a model based on probability functions with emitted distribution speaking coughing activities. Our results show have substantial influence Eq. Drier environments exhibit notable increase suspended droplets (cf. moist environments), having 10-fold when RH decreases from 90 % 20 2-fold at representative summer environment (T = 25° C). warmer environments, values are consistently higher colder), increases of up 22 9 speaking. This indicates has smaller impact than humidity. We demonstrate that conditions important quantifying using method. essential

Язык: Английский

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Occupant-centered indoor environmental quality management: Physiological response measuring methods

Building and Environment, Год журнала: 2023, Номер 243, С. 110661 - 110661

Опубликована: Июль 24, 2023

Язык: Английский

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The impact of real-time carbon dioxide awareness on occupant behavior and ventilation rates in student dwellings

Energy and Buildings, Год журнала: 2024, Номер 310, С. 114132 - 114132

Опубликована: Апрель 2, 2024

Although existing standards typically prescribe fixed ventilation rates, a large portion of the building stock lacks mechanical systems. Such buildings obtain outdoor air through unintentional infiltration, open windows, and operation exhaust fans, which are mainly dependent on user awareness behavior. This study investigates whether presence simple CO2 meter display can alter behavior improve indoor quality (IAQ) in dwellings. We conducted two-week monitoring concentration, temperature, relative humidity 60 student dwellings (bedrooms living rooms) Denmark Switzerland. During first week, was concealed, occupants adhered to their usual routines. In second used display's visual feedback enhance IAQ when necessary. Results revealed that over 95% witnessed reduction median levels during both overall individual rooms. Furthermore, descriptive analysis concentration step changes exceeding thresholds "normal variation" showed an increase number negative changes, indicating shift These findings underscore efficacy ofa interface providing information environment triggering improving

Язык: Английский

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The Impact of IoT and Sensor Integration on Real-Time Weather Monitoring Systems: A Systematic Review

Research Square (Research Square), Год журнала: 2023, Номер unknown

Опубликована: Ноя. 10, 2023

The observation of weather and its impact on human life is undeniable. Weather observations are essential for various sectors, including agriculture, transportation, aviation, disaster management. Therefore, the collection data variations crucial. However, transient nature makes it difficult to collect accurate real-time data. To overcome this challenge, researchers have developed smart monitoring systems integrated with mobile applications. These utilize frameworks, technologies, techniques, Internet Things (IoT), Arduino, machine learning algorithms, deep sensors that measure temperature, humidity, wind speed, direction. provide conditions, enabling individuals make informed decisions. The primary objective review paper critically examine elaborate multiple research studies focus integrating aim understand methodologies, technologies employed in designing developing such systems. One key findings applications has significant potential improve forecasting monitoring. For instance, algorithms can analyze sensor identify patterns accurately predict future conditions.Additionally, cloud computing technology these allows secure storage, making accessible validated from anywhere. In conclusion, enormous improving Various techniques enabled develop sophisticated conditions. significantly affect management.

Язык: Английский

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Relationship between indoor and outdoor temperature and humidity in a residential building in Central Europe

Discover Environment, Год журнала: 2024, Номер 2(1)

Опубликована: Июнь 9, 2024

Abstract Relative humidity and temperature in indoor spaces are two important environmental factors that not only determine the behaviour well-being of building occupants but also influence airborne transmission respiratory diseases closed spaces. While recent studies have examined how well conditions relate to outdoor ambient weather, most on weather-related health effects still use a single central site monitor such as weather station since values more convenient measure. However, correlation between is always straightforward. Our case study explores relationships residential apartment temperate climate Central Europe. Measurements performed over period one year allow for detailed comparison analysis correlations both daily averages profiles variables. The results this add further evidence observations day-to-day variation relative well-represented by measurements. It adds growing body data variables should thus prove useful aiming examining these occupants.

Язык: Английский

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The effects of temperature on work performance in the typical office environment: a meta-analysis of the current evidence

Building and Environment, Год журнала: 2024, Номер unknown, С. 112488 - 112488

Опубликована: Дек. 1, 2024

Язык: Английский

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