Natural ventilation to improve indoor air quality (IAQ) in existing homes: The development of health-based and context-specific user guidelines

Energy and Buildings, Journal Year: 2024, Volume and Issue: 314, P. 114248 - 114248

Published: May 9, 2024

Acceptable indoor air quality (IAQ) is one of the most relevant aspects a healthy home environment. Despite advances in mechanical and hybrid ventilation systems, natural still constitutes crucial intervention to improve IAQ existing homes; especially older and/or vulnerable ones. The challenge, however, optimizing strategies so reached while thermal discomfort (and potentially associated energy consumption) minimized. complexity identifying factors that may determine possibilities homes has traditionally hindered efforts from scientific community communicate straightforward answers for end-users. This work develops methodology that, based on real case studies through series simulations, provides simple, context-specific criteria recommendations order reach acceptable homes. use minimum time (MVT) indicator, alongside considerations different seasons housing types, are translated into step-by-step guidelines aimed at helping end-user (i) gain knowledge regarding opportunities limitations dwelling, (ii) identify which specific actions should be carried out under conditions maintain IAQ. conceptual framework presented, illustrated Barcelona, can replicated cities or regions with differing characteristics climatological conditions, easily accommodate other locally factors.

Language: Английский

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Evolutionary Characteristics and Driving Forces of Green Space in Guangzhou from a Zoning Perspective

Forests, Journal Year: 2024, Volume and Issue: 15(1), P. 135 - 135

Published: Jan. 9, 2024

Urban green spaces provide very important environmental and social services. Their dynamic changes are driven by a combination of natural socioeconomic factors. However, the coupling mechanism these factors has not been systematically studied. In this study, we examined characteristics space in Guangzhou from different zoning perspectives explored regional heterogeneity individual interactive effects driving using geographic detector. The results showed that (1) 2000 to 2020, annual change rate area central was more apparent than suburban areas. fragmentation near suburbs had increased. (2) Changes were influenced topography, climate, development. From 2010 expansion built-up land GDP growth gradually substantial effect on suburbs. (3) q-values interaction detections geodetector explanatory power most factor interactions exceeded Green primarily economic expansion. contrast, mainly urban topography climate. far affected climate human activity intensity. methods study can decision support for planning system other cities or regions.

Language: Английский

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Building and system design's impact on thermal resilience to overheating during heatwaves: An uncertainty and sensitivity analysis

Building and Environment, Journal Year: 2024, Volume and Issue: 265, P. 112031 - 112031

Published: Aug. 29, 2024

Language: Английский

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An efficient meteorological index for estimating building latent cooling load based on coupled temperature and humidity

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 111933 - 111933

Published: Jan. 1, 2025

Language: Английский

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Assessment of Floor-Level Impact on Natural Ventilation and Indoor Thermal Environment in Hot–Humid Climates: A Case Study of a Mid-Rise Educational Building

Buildings, Journal Year: 2025, Volume and Issue: 15(5), P. 686 - 686

Published: Feb. 22, 2025

The rapid urbanization of developing cities has intensified the challenge maintaining thermal comfort in buildings, particularly hot–humid climates. This study investigates impact floor level on airflow patterns and indoor temperatures multi-purpose mid-rise buildings Onitsha, Nigeria, where increasing urban density frequent power outages necessitate effective passive cooling strategies. Through a mixed-method approach combining empirical measurements, computational fluid dynamics (CFD) simulations, performance analysis, research examined variations ventilation rates temperature distributions across different levels six-story educational building over an annual cycle, focusing hottest (27 February), coldest (28 December), most windy (3 April), least (17 September) days. Results revealed distinct floor-level patterns: upper floors (fourth–fifth) achieved 39–40 air changes per hour (ACH) during hot periods while 30–35 degrees Celsius (°C); middle (second–third) showed moderate (15–22 ACH) but experienced heat accumulation (35–42 °C); lower reached 20 ACH conditions. Temperature stratification varied from 15 °C between entire peak conditions to 7 periods. Stack-driven contributed reductions up 3 °C, wind-driven promoted uniform distribution all levels. These findings informed floor-specific design recommendations: hybrid systems with automated controls, strategic architectural features including minimum area 15% for central atrium, comprehensive monitoring six sensors floor. provides evidence-based strategies optimizing tropical environments, valuable designing energy-efficient rapidly hot-humid

Language: Английский

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Physiological Strain in Outdoor Workers: The Hidden Danger of High Humidity

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121495 - 121495

Published: March 1, 2025

Language: Английский

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In situ air change rate estimation from metabolic CO2 measurement. Summer experimental campaign in a single-family test house.

Building and Environment, Journal Year: 2024, Volume and Issue: 259, P. 111646 - 111646

Published: May 15, 2024

Language: Английский

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Influence of window and door opening on office room environment and human thermal sensation during different seasons in moderate climate

Building and Environment, Journal Year: 2024, Volume and Issue: 259, P. 111669 - 111669

Published: May 25, 2024

Language: Английский

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Tropical Building Sustainability and the Energy Regulations

Published: Aug. 21, 2024

Tropical regions face unique challenges in building sustainability due to high temperatures, humidity, and heavy rainfall. While energy regulations are essential for promoting efficiency, their effectiveness addressing tropical climate conditions needs be studied more. This research aims systematically investigate issues evaluate the impacts of on these challenges. The study will identify gaps current by analyzing existing recommend strategies developing more comprehensive frameworks that promote sustainable practices regions. contributes effective policies achieving energy-efficient built environments climates.

Language: Английский

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A Method to Evaluate Forchheimer Resistance Coefficients for Permeable Screens and Air Louvers Modelled as a Porous Medium

Fluids, Journal Year: 2024, Volume and Issue: 9(7), P. 147 - 147

Published: June 22, 2024

Porous medium models are commonly used in Computational Fluid Dynamics (CFD) to simulate flow through permeable screens of various types. However, the setup these is often limited replicating a pressure drop cases where fluid inflow orthogonal screen. In this work, porous formulation that employs non-diagonal Forchheimer tensor presented. This capable reproducing both and deflection under varying angles for complex screen geometries. A general method determine model coefficients valid diagonal tensors proposed. The calculated using nonlinear least-squares optimisation based on an analytical solution special case Navier–Stokes equations. applicability proposed evaluated four different scenarios supplemented by local CFD simulations screens: wire mesh, perforated screens, air louvers, expanded mesh panels. practical application demonstrated modelling windbreaks double-skin facades, which typically employ aforementioned types screens.

Language: Английский

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