Building Matters: Spatial Variability in Machine Learning Based Thermal Comfort Prediction in Winters

Betty Lala, Srikant Manas Kala, Anmol Rastogi, Kunal Dahiya, Hirozumi Yamaguchi, Aya Hagishima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermal comfort in indoor environments has an enormous impact on the health, well-being, and performance of occupants. Given the focus on energy efficiency and Internet of Things enabled smart buildings, machine learning (ML) is being increasingly used for data-driven thermal comfort (TC) prediction. Generally, ML-based solutions are proposed for air-conditioned or HVAC ventilated buildings and the models are primarily designed for adults. On the other hand, naturally ventilated (NV) buildings are the norm in most countries. They are also ideal for energy conservation and long-term sustainability goals. However, the indoor environment of NV buildings lacks thermal regulation and varies significantly across spatial contexts. These factors make TC prediction extremely challenging. Thus, determining the impact of building environment on the performance of TC models is important. Further, the generalization capability of TC prediction models across different NV indoor spaces needs to be studied. This work addresses these problems. Data is gathered through month-long field experiments conducted in 5 naturally ventilated school buildings, involving 512 primary school students. The impact of spatial variability on student comfort is demonstrated through variation in prediction accuracy (by as much as 71%). The influence of building environment on TC prediction is also demonstrated through variation in feature importance. Further, a comparative analysis of spatial variability in model performance is done for children (our dataset) and adults (ASHRAE-II database). Finally, the generalization capability of thermal comfort models in NV classrooms is assessed and major challenges are highlighted.

Original languageEnglish
Title of host publicationProceedings - 2022 IEEE International Conference on Smart Computing, SMARTCOMP 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages342-348
Number of pages7
ISBN (Electronic)9781665481526
DOIs
Publication statusPublished - 2022
Event8th IEEE International Conference on Smart Computing, SMARTCOMP 2022 - Espoo, Finland
Duration: Jun 20 2022Jun 24 2022

Publication series

NameProceedings - 2022 IEEE International Conference on Smart Computing, SMARTCOMP 2022

Conference

Conference8th IEEE International Conference on Smart Computing, SMARTCOMP 2022
Country/TerritoryFinland
CityEspoo
Period6/20/226/24/22

All Science Journal Classification (ASJC) codes

  • Artificial Intelligence
  • Computer Science Applications
  • Computer Vision and Pattern Recognition

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