Neutral thermal sensation or dynamic thermal comfort? Numerical and field test analysis of a thermal chair.

Journal article


Shahzad, Sally, Calautit, John Kaiser, Aquino, Angelo I., Nasir, Diana S. N. M. and Hughes, Ben 2018. Neutral thermal sensation or dynamic thermal comfort? Numerical and field test analysis of a thermal chair. Energy Procedia. https://doi.org/10.1016/j.egypro.2017.12.587
AuthorsShahzad, Sally, Calautit, John Kaiser, Aquino, Angelo I., Nasir, Diana S. N. M. and Hughes, Ben
Abstract

Neutral thermal sensation is considered as the measure of thermal comfort in research, as when participants report feeling neutral regarding the thermal environment, they are considered as thermally comfortable. This is taken for granted, and although a few researchers have criticised the matter, still researchers use thermal sensation and the neutral point to assess the thermal conditions in their studies. This study questions the application of thermal neutrality and consequently poses a question on the findings of all the studies that only rely on it. Field studies of thermal comfort were applied in an open plan office in the UK in the winter of 2014. Participants were provided with a thermal chair and before and after using the chair, their views of comfort were recorded, including the ASHRAE seven point scale of thermal sensation, thermal preference, comfort, and satisfaction. The thermal environment was measured and compared against the ASHRAE Standard 55-2013. In addition, numerical modelling was also conducted to investigated the airflow and thermal distribution around the proposed thermal chair with a seated occupant. The results indicated that overall, 72% of the respondents, who did not feel neutral (thermal sensation) before or after using the thermal chair reported to feel comfortable and 65% reported to be satisfied. The results indicated that a neutral thermal sensation does not guarantee thermal comfort of the occupants and that thermal comfort is dynamic and other thermal sensations need to be considered. This study recommends the use of multiple methods (e.g. thermal, preference, decision, comfort, and satisfaction) to assess thermal comfort more accurately. Also, it questions the findings of any research that solely relies on thermal sensation and particularly on the neutral thermal sensation to assess thermal comfort of the occupants. The results also emphasised the importance of the application of numerical modelling in evaluating the thermal performance of the chair.

KeywordsThermal comfort; Thermal control; Neutral thermal sesation; Thermal chair
Year2018
JournalEnergy Procedia
PublisherElsevier
ISSN18766102
Digital Object Identifier (DOI)https://doi.org/10.1016/j.egypro.2017.12.587
Web address (URL)http://hdl.handle.net/10545/622115
hdl:10545/622115
Publication dates31 Jan 2018
Publication process dates
Deposited09 Feb 2018, 15:30
Rights

Archived with thanks to Energy Procedia

ContributorsUniversity of Derby, University of Nottingham and University of Sheffield
File
File Access Level
Open
File
File Access Level
Open
Permalink -

https://repository.derby.ac.uk/item/9503x/neutral-thermal-sensation-or-dynamic-thermal-comfort-numerical-and-field-test-analysis-of-a-thermal-chair

Download files

  • 15
    total views
  • 4
    total downloads
  • 0
    views this month
  • 0
    downloads this month

Export as

Related outputs

Advanced personal comfort system (APCS) for the workplace: A review and case study.
Shahzad, Sally, Calautit, John Kaiser, Calautit, Katrina, Hughes, Ben and Aquino, Angelo I. 2018. Advanced personal comfort system (APCS) for the workplace: A review and case study. Energy and Buildings. https://doi.org/10.1016/j.enbuild.2018.02.008
Effect of urban street canyon aspect ratio on thermal performance of road pavement solar collectors (RPSC)
Nasir, Diana S. N. M., Hughes, Ben Richard, Calautit, John Kaiser, Aquino, Angelo I. and Shahzad, Sally 2017. Effect of urban street canyon aspect ratio on thermal performance of road pavement solar collectors (RPSC). Energy Procedia. https://doi.org/10.1016/j.egypro.2017.03.936
A user-controlled thermal chair for an open plan workplace: CFD and field studies of thermal comfort performance
Shahzad, Sally, Calautit, John Kaiser, Aquino, Angelo I., Nasir, Diana S. N. M. and Hughes, Ben Richard 2017. A user-controlled thermal chair for an open plan workplace: CFD and field studies of thermal comfort performance. Applied Energy. https://doi.org/10.1016/j.apenergy.2017.05.118
CFD and Wind Tunnel Study of the Performance of a Multi-Directional Wind Tower with Heat Transfer Devices
Calautit, John Kaiser, Hughes, Ben, O'Connor, Dominic and Shahzad, Sally 2015. CFD and Wind Tunnel Study of the Performance of a Multi-Directional Wind Tower with Heat Transfer Devices. Energy Procedia.
Energy and Comfort in Contemporary Open Plan and Traditional Personal Offices
Shahzad, Sally, Theodossopoulos, Dimitris, Hughes, Ben, Calautit, John Kaiser and Brennan, John 2016. Energy and Comfort in Contemporary Open Plan and Traditional Personal Offices. Applied Energy Journal. https://doi.org/10.1016/j.apenergy.2016.02.100
CFD and wind tunnel study of the performance of a uni-directional wind catcher with heat transfer devices
Calautit, John Kaiser, Hughes, Ben and Shahzad, Sally 2015. CFD and wind tunnel study of the performance of a uni-directional wind catcher with heat transfer devices. Renewable Energy Journal. https://doi.org/10.1016/j.renene.2015.04.005
Health, Energy and Thermal Comfort.
Shahzad, Sally, Brennan, John, Theodossopoulos, Dimitris, Hughes, Ben and Calautit, John Kaiser 2015. Health, Energy and Thermal Comfort. The University of Sheffield Engineering Symposium.
Computational and field test analysis of thermal comfort performance of user-controlled thermal chair in an open plan office
Shahzad, Sally, Calautit, John Kaiser, Hughes, Ben and Nasir, Diana S. N. M. 2016. Computational and field test analysis of thermal comfort performance of user-controlled thermal chair in an open plan office. ICAE 2016 Conference Proceedings.
Thermal Comfort and Energy: CFD, BES and Field Study in a British Open Plan Office with Displacement Ventilation
Shahzad, Sally, Calautit, John Kaiser, Hughes, Ben, Brennan, John and Theodossopoulos, Dimitris 2016. Thermal Comfort and Energy: CFD, BES and Field Study in a British Open Plan Office with Displacement Ventilation. Proceedings of 9th Windsor Conference: Making Comfort Relevant..
Numerical and Experimental Analysis of a Multi-Directional Wind Tower Integrated with Vertically-Arranged Heat Transfer Devices (VHTD).
Calautit, John Kaiser, Hughes, Ben, O'Connor, Dominic and Shahzad, Sally 2016. Numerical and Experimental Analysis of a Multi-Directional Wind Tower Integrated with Vertically-Arranged Heat Transfer Devices (VHTD). Applied Energy Journal. https://doi.org/10.1016/j.apenergy.2016.02.025
Building Related Symptoms, Energ, and Thermal Comfort in the Workplace: Personal and Open Plan Offices
Shahzad, Sally, Brennan, John, Theodossopoulos, Dimitris, Hughes, Ben and Calautit, John Kaiser 2016. Building Related Symptoms, Energ, and Thermal Comfort in the Workplace: Personal and Open Plan Offices. Sustainability Journal.
Computational and Wind Tunnel Study of the Performance of a Multi-Directional Wind Tower with Heat Transfer Devices. International Conference on Applied Energy
Calautit, John Kaiser, O'Connor, Dominic, Hughes, Ben and Shahzad, Sally 2015. Computational and Wind Tunnel Study of the Performance of a Multi-Directional Wind Tower with Heat Transfer Devices. International Conference on Applied Energy. Energy Procedia.
The Accuracy of Thermal Comfort Zone, ASHRAE Standard 55-2013. CIBSE Technical Symposium 2016
Shahzad, Sally, Brennan, John, Theodossopoulos, Dimitris, Hughes, Ben and Calautit, John Kaiser 2016. The Accuracy of Thermal Comfort Zone, ASHRAE Standard 55-2013. CIBSE Technical Symposium 2016. CIBSE Proceedings.
Adapting Buildings to meet the Energy Challenge
Calautit, John Kaiser, Hughes, Ben and Shahzad, Sally 2014. Adapting Buildings to meet the Energy Challenge. Cities Conference.
Analysis of the Impact of Urban Configuration on Road Solar Collectors.
Nasir, Diana S. N. M., Hughes, Ben, Calautit, John Kaiser and Shahzad, Sally 2016. Analysis of the Impact of Urban Configuration on Road Solar Collectors. ICAE 2016 Conference Proceedings.
Thermal Comfort and Energy Efficiency in a Naturally Ventilated Office: CFD, BES and a Field Study
Calautit, John Kaiser, Shahzad, Sally, Hughes, Ben, Brennan, John and Theodossopoulos, Dimitris 2015. Thermal Comfort and Energy Efficiency in a Naturally Ventilated Office: CFD, BES and a Field Study. in: Nova Publishers.
Performance Investigation of a Commercial Wind Catcher with Horizontally-Arranged Heat Transfer Devices (HHTD).
Calautit, John Kaiser, O'Connor, Dominic, Hughes, Ben and Shahzad, Sally 2015. Performance Investigation of a Commercial Wind Catcher with Horizontally-Arranged Heat Transfer Devices (HHTD). Journal of Engineering and Technology.
Energy Efficiency and User Comfort in the Workplace: Norwegian Cellular vs. British Open Plan Workplaces
Shahzad, Sally, Brennan, John, Theodossopoulos, Dimitris, Hughes, Ben and Calautit, John Kaiser 2015. Energy Efficiency and User Comfort in the Workplace: Norwegian Cellular vs. British Open Plan Workplaces. Energy Procedia.
Numerical Analysis of a Wind Catcher Assisted Passive Cooling Technology.
Calautit, John Kaiser, Hughes, Ben, Shahzad, Sally and Nasir, Diana S. N. M. 2015. Numerical Analysis of a Wind Catcher Assisted Passive Cooling Technology. USES 2015 - The University of Sheffield Engineering Symposium.
Thermal comfort and indoor air quality analysis of a low-energy cooling windcatcher.
Calautit, John Kaiser, Aquino, Angelo I., Shahzad, Sally, Nasir, Diana S. N. M and Hughes, Ben Richard 2016. Thermal comfort and indoor air quality analysis of a low-energy cooling windcatcher. Energy Procedia. https://doi.org/10.1016/j.egypro.2017.03.634
Numerical Analysis of a Wind Catcher Assisted Passive Cooling Technology
Calautit, John Kaiser, Hughes, Ben, Shahzad, Sally and Nasir, Diana S. N. M. 2015. Numerical Analysis of a Wind Catcher Assisted Passive Cooling Technology. USES 2015 - The University of Sheffield Engineering Symposium.
Performance Investigation of a Commercial Wind Catcher with Horizontally-arranged Heat Transfer Devices (HHTD).
Calautit, John Kaiser, O'Connor, Dominic, Hughes, Ben and Shahzad, Sally 2015. Performance Investigation of a Commercial Wind Catcher with Horizontally-arranged Heat Transfer Devices (HHTD). Annual International Conference on Architecture and Civil Engineering.
Energy efficiency and comfort in the workplace: Norwegian cellular and British open plan
Shahzad, Sally, Brennan, John, Theodossopoulos, Dimitris, Hughes, Ben and Calautit, John Kaiser 2015. Energy efficiency and comfort in the workplace: Norwegian cellular and British open plan. Energy Procedia.