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Evaluation of Integral Effect of Thermal Comfort, Air Quality and Draught Risk for Desks Equipped with Personalized Ventilation Systems

Author

Listed:
  • Eusébio Conceição

    (Faculdade de Ciências e Tecnologia—Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal)

  • Hazim Awbi

    (School of Built Environment, University of Reading, Reading RG6 6DF, UK)

Abstract

This work evaluates the integral effect of thermal comfort (TC), indoor air quality (IAQ) and Draught Risk (DR) for desks with four personalized ventilation (PV) systems. The numerical study, for winter and summer thermal conditions, considers a virtual chamber, a desk, four different PV systems, four seats and four virtual manikins. Two different PV configurations, two upper and two lower air terminal devices (ATD) with different distance between them are considered. In this study a coupling of numerical methodology, using one differential and two integral models, is used. The heating, ventilating and air conditioning (HVAC) system performance in this work is evaluated using DR and room air removal effectiveness (ε DR) that is incorporated in an Air Distribution Index (ADI). This new index, named the Air Distribution Turbulence Index (ADTI), is used to consider simultaneously the TC, the IAQ, the DR and the effectiveness for heat removal (ε TC ), contaminant removal (ε AQ ) and room air removal (ε DR ). The results show that the ADI and ADTI, are generally higher for Case II than for Case I, increase when the inlet air velocity increases, are higher when the exit air is located at a height 1.2 m than when is located at 1.8 m, and are higher for summer conditions than for winter conditions. However, the values are higher for the ADI than ADTI.

Suggested Citation

  • Eusébio Conceição & Hazim Awbi, 2021. "Evaluation of Integral Effect of Thermal Comfort, Air Quality and Draught Risk for Desks Equipped with Personalized Ventilation Systems," Energies, MDPI, vol. 14(11), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:11:p:3235-:d:566951
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    References listed on IDEAS

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    1. Anna Laura Pisello & Federico Rossi & Franco Cotana, 2014. "Summer and Winter Effect of Innovative Cool Roof Tiles on the Dynamic Thermal Behavior of Buildings," Energies, MDPI, vol. 7(4), pages 1-19, April.
    2. Yin Tang & Hang Yu & Zi Wang & Maohui Luo & Chaoen Li, 2020. "Validation of the Stolwijk and Tanabe Human Thermoregulation Models for Predicting Local Skin Temperatures of Older People under Thermal Transient Conditions," Energies, MDPI, vol. 13(24), pages 1-16, December.
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    Cited by:

    1. Zhonghua Zhang & Lingjie Zeng & Huixian Shi & Gukun Yang & Zhenjiang Yu & Wenjun Yin & Jun Gao & Lina Wang & Yalei Zhang & Xuefei Zhou, 2021. "Dynamics and Numerical Simulation of Contaminant Diffusion for a Non-Flushing Ecological Toilet," Energies, MDPI, vol. 14(22), pages 1-22, November.
    2. Wenhui Ji & Yanping Yuan, 2022. "Development of Assessing the Thermal Comfort and Energy Performance for Buildings," Energies, MDPI, vol. 15(16), pages 1-2, August.
    3. Ewa Zender-Świercz & Marek Telejko & Beata Galiszewska & Mariola Starzomska, 2022. "Assessment of Thermal Comfort in Rooms Equipped with a Decentralised Façade Ventilation Unit," Energies, MDPI, vol. 15(19), pages 1-16, September.

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