1. The dilemma of variables assumptions in thermal comfort calculations for educational buildings: to simplify or not?
- Author
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Universitat Politècnica de Catalunya. Doctorat en Enginyeria Ambiental, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Biomèdica, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial, Universitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient, Universitat Politècnica de Catalunya. TecSalut - Grup de Recerca en Tecnologies de la Salut, Universitat Politècnica de Catalunya. GRIC - Grup de Recerca i Innovació de la Construcció, Ruiz de Alegría Sala, Alba, Marín López, Daniel, Canals Casals, Lluc, Fonollosa Magrinyà, Jordi, Macarulla Martí, Marcel, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Ambiental, Universitat Politècnica de Catalunya. Doctorat en Enginyeria Biomèdica, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial, Universitat Politècnica de Catalunya. ENMA - Enginyeria del Medi Ambient, Universitat Politècnica de Catalunya. TecSalut - Grup de Recerca en Tecnologies de la Salut, Universitat Politècnica de Catalunya. GRIC - Grup de Recerca i Innovació de la Construcció, Ruiz de Alegría Sala, Alba, Marín López, Daniel, Canals Casals, Lluc, Fonollosa Magrinyà, Jordi, and Macarulla Martí, Marcel
- Abstract
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 is- sues, the study conducts a sensitivity analysis using latin hypercube sampling with multidimen- sional 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 ¿C and ±0.2 ¿ 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 ¿C as achieved with globe sensors. When mean radiant temperature accuracy improves (i.e. ±0.2 ¿C), the outcome of the models with less variables imply an overestimation falling out of the uncertainty of the complete model., This study is supported by “ComMit-20 – 2020PANDE00116” project funded by L’Agència de Gestió d’Ajuts Universitaris i de Recerca (AGAUR) through the Pandèmies 2020 programme; MOVE4EDU “Modular ventilation system integrated with urban food production in educational buildings" project, reference PID2021-126845OB-C22, funded by MCIN/AEI/10.13039/501100011033 and, by “ ERDF A way of making Europe”; Catalan Agency AGAUR under their research group support program (2021 SGR 00341, 2021 SGR 00226 and 2021 SGR 01052); Networking Biomedical Research Centre in the subject area of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN, Spain), initiatives of Instituto de Investigación Carlos III (ISCIII); ISCIII (grant AC22/00035); ACCI Ó (grant Innotec ACE014/20/000018); the Spanish Ministry of Economy and Competitiveness (www.mineco.gob.es) PID2021- 122952OB-I00; Pla de Doctorats Industrials de la Secretaria d’Universitats i Recerca del Departament d’Empresa i Coneixement de la Generalitat de Catalunya (2022 DI 014); and CERCA Program/Generalitat de Catalunya. JF and LCC also acknowledge the Serra Húnter Program., Postprint (published version)
- Published
- 2024