Investigation on thermal comfort using driver’s bio-signals depend on vehicle cabin and vent exit air temperature

Shin, Young‐Han; Ham, Jeonggyun; Cho, Honghyun

doi:10.1007/s12206-019-0653-y

Cited by 16 publications

(2 citation statements)

References 15 publications

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“…Vehviläinen et al's [29] experiment supports this view by demonstrating significant changes in blood carbon dioxide levels in unventilated offices. Moreover, Shin et al [54] suggested that the LF/HF ratio fails to denote a comfortable condition under colder environments. In studies of thermal comfort that use the LF/HF index, participants undergo a period of thermal adaptation, and the human body employs effective selfregulation mechanisms such as shivering and sweating to mitigate thermal stress.…”

Section: Discussion On the Relationships And Mechanism Between Co 2 A...mentioning

confidence: 99%

Field Investigations on Subjective Perception, Physiological Responses, and Cognitive Performance under Increasing CO2 Concentration in an Underground Confined Space

Xie,

Wang,

Zhou

et al. 2024

Indoor Air

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The objective of this research was to explore the impacts of heightened CO2 concentrations on human health and wellness in an underground confined space. A total of 180 participants were subjected to CO2 concentrations ranging from 1000 to 10000 ppm within a confined underground environment. The study assessed not only subjective perceptions and physiological responses but also cognitive performance, integrating novel measures such as emotion, skin conductance (SC), and heart rate variability (HRV). The findings demonstrated a notable variation in thermal sensation votes (TSV) and perceived air quality acceptability with the change in CO2 concentration. A significant increase in total mood disturbance (TMD) of 1.5 units was observed at a CO2 concentration of 8500 ppm, compared to 1000 ppm. Cognitive performance remained consistent for concentrations below 8500 ppm; however, a substantial alteration was noted at 10000 ppm. In terms of task difficulty, numerical calculations were perceived to require 0.74 units more effort than letter searches. As CO2 concentration exceeded 7500 ppm, significant variances were noted in physiological parameters such as diastolic blood pressure (DBP), heart rate (HR), LF/HF, MF/HF ratios, PNN 50, and frequency domains of HRV (LF, MF, and HF) in comparison to the parameters at 1000 ppm. At 8500 ppm, the LF and HF parameters were found to be 780 and 452.3 units, respectively, higher than at 7000 ppm. These findings suggest that high humidity, low temperature, and elevated CO2 concentrations collectively contribute to the significant human stress responses. This study is of interest as there are limited reported researches on the air quality in underground confined space.

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Section: Discussion On the Relationships And Mechanism Between Co 2 A...mentioning

confidence: 99%

Field Investigations on Subjective Perception, Physiological Responses, and Cognitive Performance under Increasing CO2 Concentration in an Underground Confined Space

Xie,

Wang,

Zhou

et al. 2024

Indoor Air

View full text Add to dashboard Cite

show abstract

“…From a state of thermal neutrality or comfort, any change will be perceived as unpleasant [3]. Thermal comfort research models take into account flexibility in indoor thermal conditions that extend the range of temperatures considered comfortable and incorporate strategies such as natural ventilation [5].…”

Section: Introductionmentioning

confidence: 99%

Considerations on design, development and testing of Electrical Machines for automotive HVAC

et al. 2020

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HVAC represents one of the highest energy consumer in a vehicle and for full electric vehicles, the design of HVAC and the dimensioning of its driving system is of utmost importance in order to avoid the limitation of driving range. Due to its advantages, especially when it comes to power density, PMSM is one of the most used electrical machines for a wide range of automotive applications, including HVAC systems. The paper presents the generation of the requirements, design, analysis and HiL testing of a PMSM for HVAC applications. The challenge is to develop a machine answering to the requirements for an electric vehicle HVAC at low- voltage. An experimental model of the machine was tested using a test- bench, based on HiL techniques.

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Performance evaluation of novel solar-powered domestic air cooler with Peltier modules

et al. 2020

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Investigation on thermal comfort using driver’s bio-signals depend on vehicle cabin and vent exit air temperature

Cited by 16 publications

References 15 publications

Field Investigations on Subjective Perception, Physiological Responses, and Cognitive Performance under Increasing CO2 Concentration in an Underground Confined Space

Field Investigations on Subjective Perception, Physiological Responses, and Cognitive Performance under Increasing CO2 Concentration in an Underground Confined Space

Considerations on design, development and testing of Electrical Machines for automotive HVAC

Performance evaluation of novel solar-powered domestic air cooler with Peltier modules

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