<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/9997350" mdate="2014-01-01 00:00:00"> <author>Ramy H. Mohammed</author> <title>Numerical Investigation of Displacement Ventilation Effectiveness</title> <pages>250 - 255</pages> <year>2014</year> <volume>8</volume> <number>2</number> <journal>International Journal of Environmental and Ecological Engineering</journal> <ee>https://publications.waset.org/pdf/9997350</ee> <url>https://publications.waset.org/vol/86</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>Displacement ventilation of a room with an occupant is modeled using CFD. The geometry of manikin is accurately represented in CFD model to minimize potential. Indoor zero equation turbulence model is used to simulate all cases and the effect of the thermal radiation from manikin is taken into account. After validation of the code, predicted mean vote, mean age of air, and ventilation effectiveness are used to predict the thermal comfort zones and indoor air quality. The effect of the inlet velocity and temperature on the thermal comfort and indoor air quality is investigated. The results show that the inlet velocity has great effect on the thermal comfort and indoor air quality and low inlet velocity is sufficient to establish comfortable conditions inside the room. In addition, the displacement ventilation system achieves not only thermal comfort in ventilated rooms, but also energy saving of fan power. </abstract> <index>Open Science Index 86, 2014</index> </article>