Experimental study of a semi-passive ventilation grille with a feedback control system

D'Orazio, A.; Fontana, L.; Salata, F.
August 2011
Review of Scientific Instruments;Aug2011, Vol. 82 Issue 8, p085107
Academic Journal
The diffusion of window frames with low air permeability, due to the energy saving regulations, has implied in several cases the worsening of the indoor microclimate and air quality. On the other hand, air-tight window frames imply uncontrolled and too high air change rates. The mechanical ventilation not always is a practicable solution because of economic reasons and because it implies energy waste. Various Italian and European environmental and energetic laws take into consideration and promote the use of controlled natural ventilation, though this definition is not associated to well defined and tested technical solutions. An adequate solution can be achieved by using semi-passive self adjustable ventilation devices, able to ensure controlled changes of indoor air. In this paper, a semi-passive damper with a feedback control system is proposed and its behavior is investigated by means of experimental study. The presented semi-passive grille allows to control the air flow rate, injected into the room by natural or artificial pressure gradient, more effectively than the usual passive ventilation grilles made available by the present industrial production. However, since the semi-passive grille has a one-way flow, in the natural ventilation of a flat the proper functioning of the system could be ensured with a more complex configuration, with respect to the passive self-regulating grilles, able to limit the flow of fresh air in the presence of high levels of Δp; conversely, it could have widespread use in applications requiring a more accurate control of airflow in case of mechanical ventilation plants.


Related Articles

  • ILLUMINATING INFO: UV-C For HVAC. Fencl, Forrest // Engineered Systems;Oct2013, Vol. 30 Issue 10, p20 

    The article focuses on the ultraviolet radiation (UV-C) systems for heating, ventilation, and air conditioning (HVAC) equipment. It states that the specific for UV-C irradiance is the most important guidance in the guidebook "2011 ASHRAE Handbook: Applications." It mentions that the popularity...

  • Air quality control in confined spaces by means of natural ventilation. Cannistraro, G.; Galli, G.; Giaconia, C.; Magazu`, S.; Piccolo, A. // AIP Conference Proceedings;2000, Vol. 513 Issue 1, p357 

    In this work a simplified methodology for predicting the effectiveness of natural ventilation in assuring minimum ventilation rates for internal comfort is reported. © 2000 American Institute of Physics.

  • Solar add-on --buried pipes stabilize temperatures. FLATHERS, ARTHUR // Popular Science;Jan83, Vol. 222 Issue 1, p74 

    The article highlights the temperature stabilization of the air flow of a sun room. It used the floor as 70-ton thermal mass and polyvinyl chloride (PVC) pipes for thorough circulation. It buried four-inch-diameter pipes beneath the six-foot-deep rock mass and extended up to floor grilles at...

  • Restroom Exhaust Systems. TAYLOR, STEVEN T. // ASHRAE Journal;Feb2014, Vol. 56 Issue 2, p28 

    The article provides tips on designing restroom exhaust systems with low energy costs. It explains the flaws in using air changes per hour (ACH) to size any ventilation system. Techniques for eliminating the need for damper remote controls are presented, such as by using a lay-in style grille...

  • Vertical capacity of grillage foundations in sand. Bransby, M.F.; Brown, M.J.; Knappett, J.A.; Hudacsek, P.; Morgan, N.; Cathie, D.; Maconochie, A.; Yun, G.; Ripley, A.G.; Brown, N.; Egborge, R. // Canadian Geotechnical Journal;Aug2011, Vol. 48 Issue 8, p1246 

    Grillage foundations may be chosen as an alternative to standard shallow offshore foundations owing to their improved hydrodynamic performance during installation. They consist of a mesh of vertical grilles that penetrate the seabed. During vertical loading, the capacity of a conventional...

  • Influence of ventilation on energy consumption and carbon emissions in high occupant density building. Wang, J.; Zhang, X. // International Journal of Energy & Environment;2010, Issue 2, p351 

    Reasonable determination of outdoor airflow for building ventilation is very useful for indoor air quality improvement and building energy conservation. Variation characteristics of outdoor airflow requirement, building energy consumption and carbon emission for ventilation with indoor occupant...

  • Simplified Model of Contaminant Dispersion in Rooms Conditioned by Chilled-Ceiling Displacement Ventilation System. Kanaan, M.; Ghaddar, N.; Ghali, K. // HVAC&R Research;Nov2010, Vol. 16 Issue 6, p765 

    The aim of this paper is to develop and experimentally validate a simplified model to predict carbon dioxide transport and distribution in rooms conditioned by chilled-ceiling displacement ventilation (CC/DV) system for known supply thermal and flow conditions and chilled-ceiling temperature....

  • Impact of residential infiltration-reducing energy conservation measures on indoor air quality and potential health effects Godish, Thad // Environmental Reviews;1996, Vol. 4 Issue 2, p91 

    No abstract available.

  • Better airflow with less air. Raymond, Martha K. // Machine Design;05/07/98, Vol. 70 Issue 8, p60 

    Describes how the displacement ventilation process can improve air quality and save energy. Development of the process by researchers at Massachusetts Institute of Technology's Building Technology Program and the Energy Lab; Dispersion of air through large openings; Direct supply of clean air...


Read the Article


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

Try another library?
Sign out of this library

Other Topics