A user-controlled thermal chair for an open plan workplace: CFD and field studies of thermal comfort performance

Journal article


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
AuthorsShahzad, Sally, Calautit, John Kaiser, Aquino, Angelo I., Nasir, Diana S. N. M. and Hughes, Ben Richard
Abstract

This study aims to improve user comfort and satisfaction regarding the thermal environment in the open plan office, which is a current challenge in the workplace addressed by limited research. The main difficulty in an open plan setting is that changing the room temperature in an area affects all occupants seated nearby. This issue in addition to individual differences in perceiving the thermal environment create a great challenge to satisfy all occupants in the workplace. This study investigates the application of an advanced thermal system, a user-controlled thermal chair, which allows individual control over their immediate thermal environment without affecting the thermal environment and comfort of other occupants. The performance of the chair was further analysed through Computational Fluid Dynamics (CFD) simulations providing a detailed analysis of the thermal distribution around a thermal chair with a sitting manikin. The results indicated that user thermal comfort can be enhanced by improving the local thermal comfort of the occupant. A prototype of an office chair equipped with thermal control over the seat and the back was produced and examined in an open plan office in November in Leeds, UK. Forty-five individuals used the chair in their everyday context of work and a survey questionnaire was applied to record their views of the thermal environment before and after using the chair. The results of the field study revealed 20% higher comfort and 35% higher satisfaction level, due to the use of thermal chair. Thermal measurements showed acceptable thermal conditions according to the ASHRAE Standard 55-2013. Over 86% of the occupants set the temperature settings of the seat and the back of the chair between 29 °C and 39°. 82% of the occupants expressed their satisfaction level as “satisfied” or “very satisfied” regarding the performance of the thermal chair. The thermal chair energy consumption was relatively low (0.03 kW) when compared with that of typical personal heaters, which are about 1–1.5 kW. Further research is recommended to improve the design and application of the thermal chair to improve user overall thermal comfort and also further reduce energy consumption.

KeywordsThermal chair; Comfort; Open plan office; Thermal control; Computational fluid dynamics (CFD)
Year2017
JournalApplied Energy
PublisherElsevier
ISSN03062619
Digital Object Identifier (DOI)https://doi.org/10.1016/j.apenergy.2017.05.118
Web address (URL)http://hdl.handle.net/10545/621870
hdl:10545/621870
Publication dates07 Jun 2017
Publication process dates
Deposited26 Sep 2017, 13:06
Accepted14 May 2017
Rights

Archived with thanks to Applied Energy

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

https://repository.derby.ac.uk/item/931v6/a-user-controlled-thermal-chair-for-an-open-plan-workplace-cfd-and-field-studies-of-thermal-comfort-performance

Download files

  • 10
    total views
  • 1
    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
Neutral thermal sensation or dynamic thermal comfort? Numerical and field test analysis of a thermal chair.
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
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
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.