Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems

Conceição, E. ORCID: https://orcid.org/0000-0001-5963-2107 and Awbi, H. (2021) Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems. Energies, 14 (11). 3235. ISSN 1996-1073 doi: 10.3390/en14113235

Abstract/Summary

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 (εDR) 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 (εTC), contaminant removal (εAQ) and room air removal (εDR). 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.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/114769
Identification Number/DOI	10.3390/en14113235
Refereed	Yes
Divisions	Science > School of the Built Environment > Construction Management and Engineering
Publisher	MDPI
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