Indoor Environments最新文献

{"title":"Honeymoon-hangover effect: Occupant workspace satisfaction decreases over time","authors":"Jing Xiong,&nbsp;Thomas Parkinson,&nbsp;Jungsoo Kim,&nbsp;Richard de Dear","doi":"10.1016/j.indenv.2024.100005","DOIUrl":"https://doi.org/10.1016/j.indenv.2024.100005","url":null,"abstract":"<div><p>This paper investigates the pattern of change in occupants’ satisfaction with the Indoor Environmental Quality (IEQ) of their workspace over time. Analyses were performed on a cumulative (2012–2023) database of responses to a Post-Occupancy Evaluation survey in Australia. 20,400 questionnaire responses from 226 office buildings were classified into five groups based on the length of time respondents had occupied their workspace. Associations between workspace satisfaction and the length of time respondents had occupied their workspace were also analysed for different gender and age cohorts. Our results show that occupant satisfaction generally decreased with the length of time they had been allocated to their present workspaces (the ‘honeymoon-hangover’ effect). People who have occupied their workspace for more than 5 years expressed lower overall satisfaction with their workspace than those who have been there for less than 6 months. The same pattern was observed for occupants’ satisfaction with other IEQ dimensions including building image and maintenance, indoor air quality, spatial comfort, and thermal comfort. This ‘honeymoon-hangover’ effect was evident across genders and age groups. Furthermore, there was negligible difference between the two genders on the ‘honeymoon-hangover’ effect, although thermal comfort and indoor air quality were generally less satisfactory for women than men. Respondents aged 30 yrs or less showed a larger decline in satisfaction over time compared to those over 50-yrs old. Within the 30-year-or-under age group, occupants who had spent more than 5 years at their workspaces consistently registered the lowest satisfaction score across all IEQ dimensions.</p></div><div><h3>Implications and impacts</h3><p>The findings in this study have significant implications for the design of Post-Occupancy Evaluation (POE) surveys and for facility managers aiming to enhance occupants' satisfaction with their workspace and workplace.</p></div>","PeriodicalId":100665,"journal":{"name":"Indoor Environments","volume":"1 1","pages":"Article 100005"},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S295036202400002X/pdfft?md5=5e12d95e07ab8f117b9f72b266a8db88&pid=1-s2.0-S295036202400002X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139699993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robustness of point measurements of carbon dioxide concentration for the inference of ventilation rates in a wintertime classroom","authors":"Carolanne V.M. Vouriot ,&nbsp;Maarten van Reeuwijk ,&nbsp;Henry C. Burridge","doi":"10.1016/j.indenv.2024.100004","DOIUrl":"https://doi.org/10.1016/j.indenv.2024.100004","url":null,"abstract":"<div><p>Indoor air quality in schools and classrooms is paramount for the health and well-being of pupils and staff. Carbon dioxide sensors offer a cost-effective way to assess and manage ventilation provision. However, often only a single point measurement is available which might not be representative of the CO₂ distribution within the room. A relatively generic UK classroom in wintertime is simulated using Computational Fluid Dynamics. The natural ventilation provision is driven by buoyancy through high- and low-level openings in both an opposite-ended or single-ended configuration, in which only the horizontal location of the high-level vent is modified. CO₂ is modelled as a passive scalar and is shown not to be ‘well-mixed’ within the space. Perhaps surprisingly, the single-ended configuration leads to a ‘more efficient’ ventilation, with lower average CO₂ concentration. Measurements taken near the walls, often the location of CO₂ sensors, are compared with those made throughout the classroom and found to be more representative of the ventilation rate if made above the breathing zone. These findings are robust with respect to ventilation flow rates and to the flow patterns observed, which were tested by varying the effective vent areas and the ratio of the vent areas.</p></div>","PeriodicalId":100665,"journal":{"name":"Indoor Environments","volume":"1 1","pages":"Article 100004"},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950362024000018/pdfft?md5=3bfcdc9b5b46e80d2e611af1f28a1ca7&pid=1-s2.0-S2950362024000018-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139674619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Jingle bells, what are those smells? Indoor VOC emissions from a live Christmas tree","authors":"Dustin Poppendieck,&nbsp;Rileigh Robertson,&nbsp;Michael F. Link","doi":"10.1016/j.indenv.2023.100002","DOIUrl":"https://doi.org/10.1016/j.indenv.2023.100002","url":null,"abstract":"<div><p>Every year in the United States conifers are purchased to serve as Christmas trees in homes where they emit volatile organic compounds (VOCs) to the indoor environment. Although many studies have measured the ecosystem-level emissions of VOCs from conifers outdoors (characterizing monoterpene, isoprene, and aldehyde emissions), little is known about VOC emission rates once a conifer is brought indoors. Using a proton transfer reaction-mass spectrometer we characterized the VOCs emitted from a freshly cut Douglas Fir for 17 days in an environmentally controlled chamber. Ozone injections were also performed to analyze indoor chemistry that may occur. Introduction of the tree into the chamber increased the response of 52 mass spectra signals detected by the PTR-MS by at least 500 counts per second (cps) compared to background levels, with concentrations sharply decreasing after the first two days. Monoterpenes were emitted from the tree at a rate of 12.4 mg h⁻¹ the first day and fell to 1 mg h⁻¹ by day three. Overall, monoterpene emissions from this Douglas fir were initially comparable to other strong indoor monoterpene sources (fragranced products and air fresheners) but decayed quickly and, within days, were smaller than other common indoor sources<em>.</em> Addition of ozone to the chamber resulted in decreased monoterpene concentrations that coincided with modest increases in formaldehyde. Four other emitted VOCs were tentatively identified due to their large increase within the first few hours of the tree placed in the chamber, behavior during ozonation, or pattern of accumulation over time.</p></div>","PeriodicalId":100665,"journal":{"name":"Indoor Environments","volume":"1 1","pages":"Article 100002"},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950362023000024/pdfft?md5=18e67d782c877ed7cf03555192dde6ac&pid=1-s2.0-S2950362023000024-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139100948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative analysis of wavelength dependence of thermal perception","authors":"Akihisa Nomoto ,&nbsp;Yoshiichi Ozeki ,&nbsp;Miyoko Oiwake ,&nbsp;Ryo Hisayama ,&nbsp;Yutaro Ogawa ,&nbsp;Mizuho Akimoto ,&nbsp;Shin-ichi Tanabe","doi":"10.1016/j.indenv.2023.100003","DOIUrl":"10.1016/j.indenv.2023.100003","url":null,"abstract":"<div><p>In recent years, significant progress has been made in the development of materials that selectively reflect or absorb radiation in specific wavelength ranges. Previous studies have shown that the same intensity of radiation can produce different degrees of thermal perception depending on its wavelength. This difference is thought to be the optical properties of the skin. However, these findings have not been quantitatively verified yet. The purpose of this study is to quantitatively analyze the effects of radiation of different wavelength ranges on thermal sensation. We conducted a human subject experiment and discovered that far-infrared radiation causes a warmer and more uncomfortable sensation than near-infrared radiation. To interpret these results, we developed a new mathematical model that predicts thermal perception caused by radiation of different wavelengths. The model is based on a heat diffusion equation within the skin and considers the optical properties of the skin to simulate thermoreceptor activities in response to given spectral irradiances. Our model explained the observed phenomenon in our and previous experiments, where the same intensity of radiation but at different wavelengths can produce different degrees of thermal perception, in terms of physiological mechanisms. Additionally, the model revealed a hierarchy in thermal sensation, with far-infrared radiation being perceived as the warmest, followed by mid-infrared, visible, and near-infrared radiation. These findings are crucial for designing materials that selectively reflect or absorb radiation in specific wavelength ranges, and for developing heaters that provide efficient heating with low energy consumption.</p></div>","PeriodicalId":100665,"journal":{"name":"Indoor Environments","volume":"1 1","pages":"Article 100003"},"PeriodicalIF":0.0,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950362023000036/pdfft?md5=db785c9eda754c9c97129bdf67ee5ce9&pid=1-s2.0-S2950362023000036-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138991809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new framework for indoor air chemistry measurements: Towards a better understanding of indoor air pollution","authors":"Nicola Carslaw ,&nbsp;Gabriel Bekö ,&nbsp;Sarka Langer ,&nbsp;Coralie Schoemaecker ,&nbsp;Victor G. Mihucz ,&nbsp;Marzenna Dudzinska ,&nbsp;Peter Wiesen ,&nbsp;Sascha Nehr ,&nbsp;Kati Huttunen ,&nbsp;Xavier Querol ,&nbsp;David Shaw","doi":"10.1016/j.indenv.2023.100001","DOIUrl":"10.1016/j.indenv.2023.100001","url":null,"abstract":"<div><p>This paper reports on the findings from INDAIRPOLLNET (INDoor AIR POLLution NETwork), a recently completed European COST Action network. INDAIRPOLLNET ran from September 2018 to March 2023 with more than 200 indoor and outdoor air quality scientists from universities, large and small companies, and research institutes around Europe and beyond. The expertise of our interdisciplinary network members covered chemistry, biology, standardisation, household energy, particulate matter characterisation, toxicology, exposure assessment, air cleaning, building materials, building physics and engineering (including ventilation and energy), and building design. The aim of INDAIRPOLLNET was to design a framework for future indoor air chemistry field campaigns, building on our improved understanding of indoor air chemistry. The main focus of our network was to better understand the sources, transformations and fate of chemical pollutants found in the air in buildings. In this paper, we present the main findings from our network, which include a call for greater spatial and temporal coverage of measurements indoors, the need for standardised techniques for indoor measurements and the impact of occupants on indoor air quality. We also present a checklist of building parameters that should be measured in any future indoor air campaign. Finally, we present our new framework, focusing on 5 key research areas: reactivity in indoor environments; mapping organic constituents indoors; the role of the occupant in indoor air chemistry; indoor modelling studies and novel materials and technologies indoors. We hope this framework will be of use to the indoor air quality community, enabling healthier buildings for the future.</p></div>","PeriodicalId":100665,"journal":{"name":"Indoor Environments","volume":"1 1","pages":"Article 100001"},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2950362023000012/pdfft?md5=343f5e274e0c1e20945d5a4d928d6e44&pid=1-s2.0-S2950362023000012-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139017131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}