Local thermal sensation and thermal comfort of human body during small-scale thermal stimulus

Building and Environment, Journal Year: 2025, Volume and Issue: 270, P. 112540 - 112540

Published: Jan. 7, 2025

Language: Английский

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Integrating immersive virtual reality (VR) technologies and multimodal IoT-enabled wireless sensor networks for real-time smart human-centered HVAC building system interaction and thermal comfort assessment and visualization

Smart and Sustainable Built Environment, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 8, 2025

Purpose By harnessing technology developments such as Internet-of-Things (IoT)-enabled intelligent sensors and immersive virtual reality (VR) experiences, facility managers can access real-time, precise information on thermal comfort-related indicators through models. While prior research studies have developed key technologies for improving the understanding of comfort its impact occupants’ well-being productivity, there remain areas yet to be explored, especially in relation integrating both real-time data from multimodal IoT-enabled smart VR technologies. Hence, this study demonstrates potential IoT assessment visualization well user interaction with HVAC systems enhance comfort. Design/methodology/approach To develop proposed integrated analytical framework paper, various steps were implemented. First, four sensing stations created installed collect (i.e. temperature relative humidity). Second, a environment was using Unity engine offer an experience. Third, into by transmitting it cloud via MQTT protocol server, programming scripts provide multiple functionalities users, including visualizing along entire indoor space interacting controlling cooling heating systems. Fourth, applicability effectiveness validated evaluated 92 participants survey questionnaire. Findings The obtained results importance aspects graphical satisfaction, spatial presence, involvement, experienced realism, low-to-no cybersickness overall application among others. More specifically, findings reflected that participants’ average scores sense involvement realism 4.69, 4.61, 4.71 4.53 out 5, respectively. showed capabilities serve powerful feature enables comprehensive variations across room/office space. Also, no statistically significant differences between responses experience those limited-to-no experience, thus further highlighting usefulness not only users but also different skills background. Originality/value This has revolutionize way built environments are managed interacted with, where monitor, assess visualize interact control devices real-world distance framework’s ability dynamic continuously updated assessments conditions positions valuable tool prompt adjustments optimize levels. Ultimately, provides intuitive platform manage comfort, promoting healthier, more productive eco-friendly environments.

Language: Английский

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Gender differences in thermal sensation and skin temperature sensitivity under local cooling

Journal of Thermal Biology, Journal Year: 2022, Volume and Issue: 111, P. 103401 - 103401

Published: Nov. 26, 2022

Language: Английский

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Off-the-shelf wearable sensing devices for personalized thermal comfort models: A systematic review on their use in scientific research

Journal of Building Engineering, Journal Year: 2023, Volume and Issue: 70, P. 106379 - 106379

Published: March 30, 2023

Human thermal comfort depends on objective variables -related to the environment- and subjective variables, related physiological conditions. While former are relatively easy be measured, latter difficult investigated since differ from person they characterized by sudden variations over time. The recent spread of off-the-shelf wearable devices for monitoring bio-signals has considerably facilitate this challenging task. aim work is provide a detailed framework about use investigations. A systematic review 35 scientific papers -selected 302 results initial database query- was performed. highlight that wristbands (mainly, Empatica E4 Fitbit), headbands (i.e., Muse 2), chest bands BioHarness 3.0 Polar H7), miniature data loggers iButton), activity sensors Move 3) were whose predominant in Those adopted different purposes, namely finding correlations between signals sensations, training and/or validating models, improving acquisition, controlling HVAC systems. proposed could represent solid background future investigations which should focus two main research streams. first one at strengthening knowledge statistical sensations signals, as well defining standardized procedures model development validation. second stream integrating personalized models into control

Language: Английский

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A systematic review of research on personal thermal comfort using infrared technology

Energy and Buildings, Journal Year: 2023, Volume and Issue: 301, P. 113666 - 113666

Published: Oct. 21, 2023

Language: Английский

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Development of an automatic personal comfort system (APCS) based on real-time thermal sensation prediction

Building and Environment, Journal Year: 2023, Volume and Issue: 246, P. 110958 - 110958

Published: Oct. 20, 2023

Language: Английский

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Occupant behavioral adjustments and thermal comfort with torso and/or foot warming in two cold indoor environments

Building and Environment, Journal Year: 2024, Volume and Issue: 257, P. 111575 - 111575

Published: April 26, 2024

Language: Английский

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Improvement of thermal perceptions and physiological responses using torso heating under short-term cold exposure

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 892, P. 164491 - 164491

Published: May 26, 2023

Language: Английский

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Occupant-centered indoor environmental quality management: Physiological response measuring methods

Building and Environment, Journal Year: 2023, Volume and Issue: 243, P. 110661 - 110661

Published: July 24, 2023

Language: Английский

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Thermal comfort and energy efficiency evaluation of a novel conductive-radiative Personal Comfort System

Building and Environment, Journal Year: 2023, Volume and Issue: 244, P. 110787 - 110787

Published: Aug. 30, 2023

Personal Comfort Systems (PCSs) create a localized comfort situation satisfying individual needs. These devices have low power consumption, as they focus on local environment and thus reduce the energy consumption of main HVAC systems by extending ambient control setpoint ranges. This study focuses assessing new type PCS: warming desk. It uses two most efficient effective means heat transfer for person: conduction (hands) radiation (lower upper body parts facing table). Two different desks were tested, both simultaneously heating upward downward with surface temperatures, one higher temperature upward. The tested 30 subjects, inside climatic chamber, kept at 17 °C air temperature. Both are capable generating good overall (whole-body) thermal sensation, even leaning towards slightly warm someone. Moreover, results showed that PCS based direct contact skin should be below 36°, while can reach temperatures: personal is critical, not everyone preferred same operative "correct" toward neutral sensation about 7K, creating improved compared to centralized HVAC. In its current design, required 170W, significantly lower than 500/1500W common portable electric heater. expected in an optimized could reduced further 30/40W.

Language: Английский

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