TITLE

Modeling the Performance of Personalized Ventilation under Different Conditions of Room Air and Personalized Air

AUTHOR(S)
Gao, Naiping; Niu, Jianlei
PUB. DATE
October 2005
SOURCE
HVAC&R Research;Oct2005, Vol. 11 Issue 4, p587
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Building-related health complaints and sick building syndrome (SBS) represent significant health problems. Personalized ventilation (PV) is able to provide better inhaled air quality since the fresh air is supplied directly to the breathing zone "gently." In this paper, after the numerical methods are validated by experiments, a seated computational thermal manikin (CTM) with geometry of a real human body is used to carry out the parameters study of PV. The modeling outcome shows that in a stagnant environment the human body is enclosed by the thermal plume, whose intensity is affected by the room air temperature. Warm rising airflow around the human body will entrain room air into inhalation and thus decreases the fraction of personalized air in the inhaled air. A uniform invading airflow in the horizontal level with the speed of 0.2 m/s (40 ft/min) is strong enough to tear away the thermal plume at the windward side of the human body. Its effect on the performance of PV is dependent on the flow direction. The benefits of personalized air supplied at a low rate limited by draught criteria are very sensitive to the ambient air conditions, which are, in turn, controlled by the background air-conditioning system.
ACCESSION #
19299548

 

Related Articles

  • Biological pollutants in indoor air. Radaković, Sonja S.; Marjanović, Milan; Šurbatović, Maja; Vukčević, Gradimir; Jovašević-Stojanović, Milena; Ristanović, Elizabeta // Vojnosanitetski Pregled: Military Medical & Pharmaceutical Journ;Dec2014, Vol. 71 Issue 12, p1147 

    No abstract available.

  • Effectiveness of Photocatalytic Filter for Removing Volatile Organic Compounds in the Heating, Ventilation, and Air Conditioning System. Kuo-Pin Yu; Lee, Grace Whei-May; Wei-Ming Huang; Chih-Cheng Wu; Chia-ling Lou; Shinhao Yang // Journal of the Air & Waste Management Association (Air & Waste M;May2006, Vol. 56 Issue 5, p666 

    Nowadays, the heating, ventilation, and air conditioning (HVAC) system has been an important facility for maintaining indoor air quality. However, the primary function of typical HVAC systems is to control the temperature and humidity of the supply air. Most indoor air pollutants, such as...

  • Findings of Personalized Ventilation Studies in a Hot and Humid Climate. Sekhar, S. C.; Gong, N.; Tham, K. W.; Cheong, K. W.; Melikov, A. K.; Wyon, D. P.; Fanger, P. O. // HVAC&R Research;Oct2005, Vol. 11 Issue 4, p603 

    The concept of personalized ventilation (PV) is at the cutting edge of technological development in the area of air conditioning and is fundamentally aimed at improving ventilation in Ihe immediate breathing zones of occupants in the built environment. While the current state-of-the-art PV...

  • CLIMA 2005 Congress Presents New Advances in Technology.  // ASHRAE Journal;Dec2005, Vol. 47 Issue 12, p10 

    The article presents information on CLIMA 2005, the World HVAC&R Congress, organized by REHVA, the European air-conditioning federation, held in Lausanne, Switzerland. The focus of the congress was on emerging technologies and improved means of measuring performance of systems. Gordon V.R....

  • Specifying air curtains for savings and performance. Johnson, David // Consulting-Specifying Engineer;Apr2009, Vol. 45 Issue 4, Special section p18 

    The article focuses on the air curtains which provide a controlled stream of air across a building entrance or doorway to separate interior and exterior environments. They can provide low-first cost and low total cost of ownership for entrances, loading doors and other applications. In addition,...

  • Development of Energy-Efficient Single-Coil Twin-Fan Air-Conditioning System with Zonal Ventilation Control. Sekhar, S. C.; Tham, K. W.; Maheswaran, Uma; Cheong, K. W. // ASHRAE Transactions;2004, Vol. 110 Issue 2, p204 

    Indoor air quality (IAQ) is strongly affected by the various sources of indoor pollutants and the efficiency of the ventilation system. Higher ventilation demands pose an enormous energy penalty, particularly in the tropics, and this paper presents a new method of air conditioning that addresses...

  • Air Recirculation and Sick Building Syndrome: A Blinded Crossover Trial. Jaakkola, Jouni J. K.; Tuomaala, Pekka; Seppänen, Olli // American Journal of Public Health;Mar1994, Vol. 84 Issue 3, p422 

    Objective. This study tested the hypothesis that recirculated air in mechanically ventilated buildings causes symptoms commonly referred to as the sick building syndrome and perceptions of poor indoor air quality. Methods. A blinded, four-period crossover trial was carried out in two identical...

  • CLEAN AIR /ACTS/. Rygielski, Laura // Health Facilities Management;May2006, Vol. 19 Issue 5, p21 

    Emphasizes the importance of thorough planning and communication between health care facilities owners, managers and design engineers in designing, installing and maintaining hospital heating, ventilation and air conditioning (HVAC) systems to ensure proper indoor air quality. Recommended rate...

  • Calculation Tools for the Ventilation Rate Procedure. Miller, Steven M. // ASHRAE Journal;Nov2006, Vol. 48 Issue 11, p16 

    The article focuses on the Standing Standards Project Committee 62.1-2004 which improves the calculations and directives on outdoor air delivery to building occupants. It commented that the changes and additional calculations had made it hard for engineers to calculate the required outdoor air...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics