Belimo controls reduce fan power in VAV systems

Published:  17 September, 2006

By enabling the fan in VAV air-distribution system to be controlled to deliver the required air volume rather than maintain a constant pressure in the duct, Belimo's MP-Bus system makes possible considerable improvements in energy efficiency. An installation in Switzerland monitored during the winter is said to have reduced fan energy consumption by 40%.

The MP-Bus enables the damper position of the VAV controller in each zone to be monitored. The damper that is open the widest serves as a reference. The speed of the fan is reduced until this damper is about 85% open and other dampers are closed as required in response to lower airflow requirements.

Since air volume is proportional to the speed of the fan and static pressure is proportional to the square of the fan speed, potential savings are immediately apparent. In addition, fan power consumption is proportional to the cube of the fan speed.



comments powered by Disqus

Search

Welcome

Welcome to Modern Building Services Online, the web edition of Modern Building Services (MBS) journal and the UK's most popular Building Services engineering site. Modern Building Services covers the entire Building Services Engineering industry. This site contains archived content from the journal, plus web-specific content.

When you go to our digital edition, you can also access the archive of digital editions.
February 2018: DIGITAL EDITION

ARCHIVE OF DIGITAL EDITIONS

Modern Building services has a group
on Linkedin - join us!

Jobs

  • Intermediate / Senior Mechanical Engineer

    The Mechanical team undertake the design and specification of a range of Mechanical building services in a lead or supporting role, depending on project complexity and scale. You should demonstrate a flexible approach to design and team working and wil......

  • Senior Urban Designer

     Applicants will be Master’s Degree qualified Architects / Urban Designers, with a strong portfolio of work highlighting a variety of projects at a range of scales and types, with strong focus on regeneration, infrastructure-led projects and major develo......

  • Principal Structural Engineer

    We are currently recruiting on behalf of a global client, with a diverse range of award winning projects to their name. Their experience spans a host of market sectors, including transport, infrastructure, defence, scientific, education, high-tech and ......

more jobs »

Poll

"Is the Building Services industry lagging behind in the implementation of BIM?"