The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?

Thermal comfort is crucial for people well-being and productivity in buildings, and it has a strong effect on building's energy usage. The main models for assessing thermal comfort, like predictive mean vote (PMV) and adaptive models, need many environmental measurements, making monitoring comp...

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Autores: Alegria-Sala, Alba, Lopez, Daniel Marin, Casals, Lluc Canals, Fonollosa, Jordi, Macarulla, Marcel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Fundació Sant Joan de Déu
Repositorio:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
OAI Identifier:oai:fsjd.fundanetsuite.com:p26055
Acceso en línea:https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=26055
Access Level:acceso abierto
Palabra clave:Thermal comfort
Globe sensor
PMV
Adaptive model
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spelling The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?Alegria-Sala, AlbaLopez, Daniel MarinCasals, Lluc CanalsFonollosa, JordiMacarulla, MarcelThermal comfortGlobe sensorPMVAdaptive modelThermal comfort is crucial for people well-being and productivity in buildings, and it has a strong effect on building's energy usage. The main models for assessing thermal comfort, like predictive mean vote (PMV) and adaptive models, need many environmental measurements, making monitoring complex. That has sparked a debate: some advocate reducing the number of variables, while others stress sticking to the original models. This article evaluates current research trends and addresses the limitations of globe sensors, the most commonly used instrument for measuring mean radiant temperature. To address these issues, the study conducts a sensitivity analysis using latin hypercube sampling with multidimensional uniformity and employs data from 41 measurements conducted in educational buildings spanning different academic levels, from preschool to university. This analysis examines various simplifications in the measuring procedures for the PMV and adaptive models proposed by ASHRAE 55, ISO 7730 and EN 16798. For this purpose, two mean radiant temperature accuracies are used according to the minimum requirement and the desired value specified by ISO 7726, +/- 2 degrees C and +/- 0.2 degrees C respectively. The results suggest that models with fewer variables tend to overestimate thermal comfort levels. However, this models are valid as their estimations fall within the uncertainty range of the complete model, as long as the mean radiant temperature accuracy is +/- 2 degrees C as achieved with globe sensors. When mean radiant temperature accuracy improves (i.e. +/- 0.2 degrees C), the outcome of the models with less variables imply an overestimation falling out of the uncertainty of the complete model.ELSEVIER2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=26055Journal of Building EngineeringISSN: 23527102reponame:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déuinstname:Fundació Sant Joan de DéuInglésinfo:eu-repo/semantics/openAccessoai:fsjd.fundanetsuite.com:p260552026-05-27T12:37:41Z
dc.title.none.fl_str_mv The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
title The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
spellingShingle The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
Alegria-Sala, Alba
Thermal comfort
Globe sensor
PMV
Adaptive model
title_short The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
title_full The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
title_fullStr The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
title_full_unstemmed The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
title_sort The dilemma of variables assumptions in thermal comfort calculations for educational buildings: To Simplify or Not?
dc.creator.none.fl_str_mv Alegria-Sala, Alba
Lopez, Daniel Marin
Casals, Lluc Canals
Fonollosa, Jordi
Macarulla, Marcel
author Alegria-Sala, Alba
author_facet Alegria-Sala, Alba
Lopez, Daniel Marin
Casals, Lluc Canals
Fonollosa, Jordi
Macarulla, Marcel
author_role author
author2 Lopez, Daniel Marin
Casals, Lluc Canals
Fonollosa, Jordi
Macarulla, Marcel
author2_role author
author
author
author
dc.subject.none.fl_str_mv Thermal comfort
Globe sensor
PMV
Adaptive model
topic Thermal comfort
Globe sensor
PMV
Adaptive model
description Thermal comfort is crucial for people well-being and productivity in buildings, and it has a strong effect on building's energy usage. The main models for assessing thermal comfort, like predictive mean vote (PMV) and adaptive models, need many environmental measurements, making monitoring complex. That has sparked a debate: some advocate reducing the number of variables, while others stress sticking to the original models. This article evaluates current research trends and addresses the limitations of globe sensors, the most commonly used instrument for measuring mean radiant temperature. To address these issues, the study conducts a sensitivity analysis using latin hypercube sampling with multidimensional uniformity and employs data from 41 measurements conducted in educational buildings spanning different academic levels, from preschool to university. This analysis examines various simplifications in the measuring procedures for the PMV and adaptive models proposed by ASHRAE 55, ISO 7730 and EN 16798. For this purpose, two mean radiant temperature accuracies are used according to the minimum requirement and the desired value specified by ISO 7726, +/- 2 degrees C and +/- 0.2 degrees C respectively. The results suggest that models with fewer variables tend to overestimate thermal comfort levels. However, this models are valid as their estimations fall within the uncertainty range of the complete model, as long as the mean radiant temperature accuracy is +/- 2 degrees C as achieved with globe sensors. When mean radiant temperature accuracy improves (i.e. +/- 0.2 degrees C), the outcome of the models with less variables imply an overestimation falling out of the uncertainty of the complete model.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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url https://fsjd.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=26055
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv ELSEVIER
publisher.none.fl_str_mv ELSEVIER
dc.source.none.fl_str_mv Journal of Building Engineering
ISSN: 23527102
reponame:r-FSJD. Repositorio Institucional de Producción Científica de la Fundació Sant Joan de Déu
instname:Fundació Sant Joan de Déu
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