Analysis of the Interplay between Indoor Air Quality and Thermal Comfort in University Classrooms for Enhanced HVAC Control DOI Creative Commons
Giulia Lamberti, Francesco Leccese, Giacomo Salvadori

и другие.

Energies, Год журнала: 2024, Номер 17(20), С. 5053 - 5053

Опубликована: Окт. 11, 2024

While aspects of indoor environmental quality, such as thermal comfort, air quality (IAQ), acoustic, and visual are usually studied separately, their interactions crucial yet often overlooked. Understanding how these factors influence each other is essential for a comprehensive perception the environment. This paper investigates relationship between (IAQ) comfort using an extensive field investigation conducted in university classrooms during heating season, collecting 712 samples subjective responses correlated with measurements. Key findings reveal significant correlations related to environment those quality. Perceived control over shows stronger IAQ than responses, particularly perceived ventilation (r = 0.41), COVID-19 risk 0.28), 0.28). Additionally, parameters demonstrate responses. Higher CO2 concentration associated increased sensation decreased preference control. Conversely, remain relatively stable changes operative temperature. The difference temperature which occupants exposed expressed neutral widens rises, indicating reduced adaptive capacity increasing levels. These insights providing HVAC system management strategies that consider interaction different IEQ, aiming improve occupants’ well-being reduce energy consumption.

Язык: Английский

An investigation of indoor thermal environments and thermal comfort in naturally ventilated educational buildings DOI Creative Commons
María L. de la Hoz‐Torres, Antonio J. Aguilar, Diego P. Ruíz

и другие.

Journal of Building Engineering, Год журнала: 2024, Номер 84, С. 108677 - 108677

Опубликована: Янв. 29, 2024

Indoor thermal conditions are essential in educational buildings. The health and well-being of students can be affected by a poor environment, which also has clear impact on building energy consumption. In this context, the indoor environment naturally ventilated university classrooms is explored study during complete academic year. A monitoring campaign questionnaire survey were conducted simultaneously higher education buildings Spain. total 2115 sets data collected. Thermal sensation prediction indices (predicted mean vote, extended predicted vote adaptive vote) applied to evaluate student’s perception their accuracy was assessed. Additionally, two machine-learning models, based Artificial neural network (ANN) random forest (FR) algorithms, formulated predict occupants’ sensation. obtained results evidenced that proposed ANN RF models outperform traditional indices. Finally, it an comfort model. suggest have greater capacity changes environmental than suggested ASHRAE-55 model they preferred with lower temperatures those EN-16798

Язык: Английский

Процитировано

23
Analysis of determining factors in the thermal comfort of university students. A comparative study between Spain and Portugal DOI Creative Commons
P. Romero, Víctor Valero Amaro, Rui Isidoro

и другие.

Energy and Buildings, Год журнала: 2024, Номер 308, С. 114022 - 114022

Опубликована: Фев. 17, 2024

The quality of the indoor thermal environment is essential because its impact on energy efficiency buildings and health well-being those who occupy them. This particularly important in educational direct student performance. Various factors, such as natural ventilation, have become relevant since COVID-19. Although this measure no longer mandatory, usefulness has been proven, it therefore interesting to evaluate understand comfort classrooms. In addition other aspects clothing, gender habits can also influence perception occupants. Therefore, study investigates these factors university Spain Portugal through a campaign measurements questionnaires. results showed that, according CO2 concentrations, ventilation strategies maintained more than Portugal. Also, protocols did not negative effect On hand, there were significant differences between student's responses two countries. fact, Portuguese students warmer preferences (Tn = 26.40 °C) Spanish 24.70 °C). Finally, clothing crucial factor comfort, with by country gender.

Язык: Английский

Процитировано

14
Thermal comfort in university classrooms in humid subtropical climate: Field study during all seasons DOI
Diego Antônio Custódio, Enedir Ghisi, Ricardo Forgiarini Rupp

и другие.

Building and Environment, Год журнала: 2024, Номер 258, С. 111644 - 111644

Опубликована: Май 14, 2024

Язык: Английский

Процитировано

9
Deriving thermal sensitivity across educational stages: Evidence-based definition of Griffiths' coefficient DOI Creative Commons
Giulia Lamberti, Giulia Torriani, Fabio Fantozzi

и другие.

Journal of Building Engineering, Год журнала: 2024, Номер 87, С. 109081 - 109081

Опубликована: Март 18, 2024

Thermal sensitivity directly impacts occupants' comfort by influencing neutral temperatures and models. The Griffiths method, commonly used to derive thermal sensitivity, often assumes a constant value of 0.5°C-1 for calculating temperatures. However, it is important note that can vary depending on factors such as building type, climatic conditions, operation mode (i.e., natural ventilation, mechanical or mixed mode), age. This study aims define whether age-dependent differences in exist schools, achieved through the formulation specific coefficients each educational stage. A field was conducted naturally ventilated classrooms within same climate zone, collecting 1548 subjective responses objective measurements from students across different stages. results demonstrate schools lower than assumed values, especially primary (0.085°C-1), increases with students' variation reflected corresponding temperatures, which also increase Using coefficient lead significant estimation errors temperature, potentially up 1 °C, impacting both energy consumption. emphasizes there are expectations related To improve reliability adaptive models ensure accurate estimations, essential future research consider age when evaluating sensitivity.

Язык: Английский

Процитировано

7
Experimental research on energy utilization, aerosol transmission and thermal comfort under different ventilation strategies: Densely-occupied classrooms as a case study DOI
Han Li,

Musong Liu,

Xiangfei Kong

и другие.

Building and Environment, Год журнала: 2025, Номер unknown, С. 112523 - 112523

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

1
A study on adaptive thermal comfort and ventilation in Malaysia secondary school classrooms of tropical climate DOI

Nor Sahidah Firman,

Sheikh Ahmad Zaki Shaikh Salim, Ng Wai Tuck

и другие.

Building and Environment, Год журнала: 2025, Номер unknown, С. 112701 - 112701

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

1
Development and comparison of adaptive data-driven models for thermal comfort assessment and control DOI Creative Commons
Giulia Lamberti, Roberto Boghetti, Jérôme Henri Kämpf

и другие.

Total Environment Research Themes, Год журнала: 2023, Номер 8, С. 100083 - 100083

Опубликована: Окт. 7, 2023

Thermal comfort prediction is an important issue, as it can largely influence occupants' well-being and buildings' energy consumption. Nowadays, models used to assess thermal have been increasingly discussed, a growing number of data-driven with several input parameters developed. Although these allow reasonably accurate predictions comfort, using complex algorithms determine might be unsuitable for some use cases, such quick estimations or real-time control Heating Ventilation, Air Conditioning (HVAC) systems. In this paper, model was developed based on 61710 samples subjective responses associated environmental from field studies available in two ASHRAE databases. Two resulted analysis, one higher accuracy simplified, which improved the comparison other regression PMV. However, since cannot conceived punctual condition, areas were derived, i.e., respective ranges at 90%, 80%, 70% acceptability. The result that error new below 90% acceptable range, means models' does not lead reduction evaluation occupant comfort. Built upon influential parameters, enable estimates occupant-cantered HVAC control. notion non-fixed state empowers more flexible building management criteria, reducing while upholding indoor

Язык: Английский

Процитировано

17
Developing a new adaptive heat balance model to enhance thermal comfort predictions and reduce energy consumption DOI Creative Commons
Giulia Lamberti, Francesca Contrada, Andrea Kindinis

и другие.

Energy and Buildings, Год журнала: 2024, Номер 321, С. 114663 - 114663

Опубликована: Авг. 14, 2024

Accurate thermal comfort prediction is essential for enhancing both and energy efficiency in buildings. The heat balance adaptive models, while widely used, have been often questioned relation to their strengths limitations. To overcome these challenges, a comprehensive understanding of the physical parameters influencing exchange occupants' capacities essential. This study introduces an analytical method formulate new model, adPMV, which integrates models considering various perception. model PMV with factor associated running mean outdoor temperature, line theory. Tested on 1377 samples from European university classrooms, adPMV demonstrates enhanced accuracy (MAE=0.74, RMSE=1.01, MBE=-0.11) compared other models. Validation naturally ventilated classrooms ASHRAE's databases further confirms promising results, showcasing reduced error indices (MAE=0.68, RMSE=0.81, MBE=-0.03). Notably, using setpoints not only improves sensation but also leads substantial reduction heating demand, reaching up 40 %. adaptability this different contexts, such as building types, climates, HVAC system operations, presents it versatile tool exploring principles.

Язык: Английский

Процитировано

5
The impact of thermal comfort requirements on household heating energy consumption DOI
Lu Jiang, Jinrou Li, Yingsheng Zheng

и другие.

Journal of Building Engineering, Год журнала: 2024, Номер 90, С. 109426 - 109426

Опубликована: Апрель 25, 2024

Язык: Английский

Процитировано

4
Seasonal field study on thermal comfort in university classrooms in Mediterranean climate DOI
María L. de la Hoz‐Torres, Antonio J. Aguilar, Ma Dolores Martínez-Aires

и другие.

Indoor and Built Environment, Год журнала: 2024, Номер 33(8), С. 1380 - 1396

Опубликована: Март 22, 2024

The assessment of indoor environmental conditions educational buildings is not only essential to ensure the correct performance heating, cooling and ventilation systems but it also fundamental guarantee a suitable environment. This study aims analyse thermal comfort students in teaching–learning spaces university with natural ventilation. A field measurement campaign questionnaire survey were carried out from September 2021 June 2022 southern Spain. collected data analysed neutral temperature each season was obtained, based on sensation votes 1966. temperatures found this 23.5°C, 23.1°C, 23.3°C 23.9°C, for autumn, winter, spring summer, respectively. ranges obtained 90% acceptability winter (21.1°C–25.1°C) provided lower limits than summer months (22.6°C–25.3°C). highest values clothing insulation autumn (0.90 clo) (0.75 seasons, compared (0.5 (0.4 seasons. An adaptive model applied. These findings could be used improve optimise energy consumption according students’ actual perception.

Язык: Английский

Процитировано

3