Air quality Performance of Ductless Personalized Ventilation in Conjunction with Displacement Ventilation: Impact of Walking Person

Zhecho Dimitrov Bolashikov, Pengfei Lu, Arsen Krikor Melikov, Malinowski Tomasz

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The present experiment evaluates the impact of air disturbances from a walking
person on inhaled air by ductless personalized ventilation (DPV) with displacement ventilation (DV), when a seated occupant is the source of pollution: bio-effluents and exhaled air. The measurements took place in a full-scale office room with two side by side workstations. Each desk included a DPV, a personal computer and desk lamps. Two dressed, breathing thermal manikins were used as seated occupants. DV floorstanding air supply was installed at the wall facing the workstations. A real person was walking between the desks and the DV supply. Pollution from feet and exhaled air by one manikin was simulated with tracer gases. Room temperature of 26 °C and 90 L/s DV supply flow rate were kept constant. Measurements under numerous combinations of DPV operation modes and supply flow rates were performed. Tracer gas concentrations in inhaled air by the two manikins were measured. The DPV was not able to protect the exposed person from contaminants emitted from a sitting and polluting occupant when there were disturbances close to the DPV. However, using the DPV at the polluting manikin’s workstation resulted in better inhaled air quality for the polluting manikin.
Original languageEnglish
Title of host publicationProceedings of Healthy Buildings Europe 2015
Number of pages8
Publication date2015
Article number458
Publication statusPublished - 2015
EventHealthy Buildings Europe 2015 - Eindhoven, Netherlands
Duration: 18 May 201520 May 2015


ConferenceHealthy Buildings Europe 2015
Internet address


  • ‘‘Ductless’’ personalized ventilation
  • Exposure
  • Bio-effluents

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