AIVC - Air Infiltration and Ventilation Centre

Search form

EBC

You are here

Home  |  ventilation system

Energy efficient duct design and control of VAV systems: where is the fan energy savings?

I. Khoo, M. Cook, 2003
ventilation system | duct | fan
Bibliographic info: Healthy Buildings 2003 - Proceedings 7th International Conference (7th-11th December 2003) - National University of Singapore - Vol. 2, pp 628-633, 4 Fig., 2 Tab., 6 Ref.
Languages: English

Energy efficient operation of variable speed fans in Variable Air Volume (VAV) systems ishighly dependent on both the type of duct design as well as the type of control strategy thathas been implemented in association with the volume flow demand profiles of each individualzone in the building. The quantification of energy savings due to duct design and the effects offan control have generally been poorly understood, even with very simplistic types of controlstrategies, e.g. static pressure P + I control which have often been employed. The introductionof networked Building Energy Management Systems (BEMS) has offered the possibility toimplement more advanced control methods using terminal unit feedback (commonly knownas box polling), which can be employed to improve the optimal usage of fan power in VAVsystems. The distribution pattern of volume airflow in a multi-zone VAV system with a ductloop is also analysed under various volume flow demand conditions. This paper quantifiedsome of the key issues pertaining to radial and duct loop designs as well as the contribution ofvarious fan control methods to the overall fan energy savings in a VAV system.


Related publications

This report summarizes the work of the initial working phase of IEA ECB Annex 62 Ventil
Maria Kolokotroni, Per Heiselberg, Lorenzo Pagliano, Jie Han, Regina Bokel, Peter Holzer, Annamaria Belleri, Denmark
This summary report presents insights on recommendations into how ventilative cooling i
Christoffer Plesner, Flourentzos Flourentzou, Guoqiang Zhang, Hilde Breesch, Per Heiselberg, Michal Pomianowski, Peter Holzer, Maria Kolokotroni, Annamaria Belleri, Denmark
Overheating in buildings is an emerging challenge at the design stage and during operat
Peter Holzer, Theofanis Psomas, Denmark