Thermal Comfort and Energy Efficiency in Built Environments

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Energy, Physics, Environment, and Systems".

Deadline for manuscript submissions: 20 January 2026 | Viewed by 346

Special Issue Editors

Department of Built Environment, College of Design and Engineering, National University of Singapore, Singapore, Singapore
Interests: thermal comfort; smart buildings; human well-being; personal comfort systems; indoor environmental quality

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Guest Editor
School of Art, Nantong University, Nantong, China
Interests: indoor environmental quality; sustainable architecture; wooden environment; human habitat design

Special Issue Information

Dear Colleagues,

The appropriate design of built environments plays a key role in improving human comfort, health, and productivity, while also reducing building energy consumption. However, applying a one-size-fits-all model is challenging due to diverse living contexts and individual differences. Emerging methodologies and concepts, such as personal comfort systems, big data, machine learning, and smart building technologies are revitalizing the field of built environment, offering new possibilities to enhance human well-being and promote energy efficiency. This Special Issue invites research contributions on topics including but not limited to the following:

  • Indoor environmental quality;
  • Human responses;
  • Thermal comfort models;
  • Personal comfort systems;
  • Smart building technologies;
  • Energy efficiency.

Dr. Heng Du
Dr. Jingyun Shen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • thermal comfort
  • indoor environmental quality
  • energy efficiency
  • environmental sustainability
  • smart buildings

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Published Papers (1 paper)

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Research

30 pages, 5861 KB  
Article
Numerical Evaluation of Cooling Energy Saving and Indoor Thermal Comfort for Building Energy Retrofit with Reflective Materials
by Tiancheng Wang, Mosha Zhao, Yu Lan and Shaoding Hu
Buildings 2025, 15(18), 3387; https://doi.org/10.3390/buildings15183387 - 18 Sep 2025
Viewed by 163
Abstract
Reflective materials, characterized by high albedo and thermal emissivity, offer effective passive cooling strategies for reducing building energy demand. While prior studies have developed thermal transfer models validated under laboratory conditions or conducted short-term monitoring in non-air-conditioned spaces, their effectiveness in operational buildings [...] Read more.
Reflective materials, characterized by high albedo and thermal emissivity, offer effective passive cooling strategies for reducing building energy demand. While prior studies have developed thermal transfer models validated under laboratory conditions or conducted short-term monitoring in non-air-conditioned spaces, their effectiveness in operational buildings remains underexplored. This research evaluates the change in cooling energy demand and indoor thermal comfort in a retrofitted office building with reflective materials in China’s Hot Summer and Cold Winter (HSCW) zone. The calibrated WUFI®Plus simulations show that the application of reflective roof and window materials can result in an 11.3% reduction in cooling energy demand. Moreover, occupant surveys indicate improved thermal perception, with the mean Thermal Comfort Vote (TCV) rising from −0.75 to −0.30, thermal acceptability increasing from 0.10 to 0.35, and 80% of occupants reporting cooler conditions. These subjective results align with simulated Predicted Mean Vote (PMV) reductions (0.82 → 0.74), confirming the retrofit’s effectiveness. While the energy savings are more modest than those reported in Mediterranean climates, they are generally consistent with the energy saving ratios of buildings in the HSCW region as evaluated by previous studies. This study provides a framework for assessing retrofits in occupied buildings with reflective materials and indicates the practicality of such retrofits as an economic, low-disruption strategy for upgrading aging office building stocks in the HSCW zone. Full article
(This article belongs to the Special Issue Thermal Comfort and Energy Efficiency in Built Environments)
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