TRENDING


Login / Sign Up



QUICK Sign-up

Membership Includes:

New Content and Magazine Article Updates
Educational Webcast Alerts
Building Products/Technology Notices
Complete Library of Reports, Webcasts, Salary and Exclusive Member Content

All fields are required.


click here for more member info.




« Facility Manager Cost Saving and Best Practice Quick Reads


RSS Feed

Unexplored Potential in HVAC Systems




November 20, 2013 - HVAC

When it comes to making changes to save energy, building owners like to see low-cost or even no-cost measures. Many of these smaller fixes are relatively obvious to a third-party set of eyes with design and operational experience (perhaps hired to perform an energy audit), but may be missed by those "in the trenches."

So before you start replacing expensive equipment, work with your building engineer or maintenance technician, and conduct an audit to make sure your existing equipment works properly.

Some of the simple things you may find include:

  • Variable frequency drives that were set on bypass because of a problem with the drive. We often find drives running at the full 60Hz because they have never been returned to their proper automatic action state.
  • Economizer dampers in a particular fixed position because of linkage or drive motor failures.
  • Outside air dampers with a 2-by-4 wedged into them to keep them open because of the same control failure as above.
  • Dirty primary or secondary filters cutting down on proper airflow.

Probably the most underexplored area, though, is thorough examination of the hydronic coils, primarily the cooling coils. Cooling coils, especially those with tight fin spacings, oftentimes act as filters, trapping not only particulate but also biological masses on the fins. This not only impedes the proper volume of air getting through the coils and thus to the spaces served by the HVAC system, but also reduces the heat transfer of the system, causing the compressors to work harder and thus use more energy. And it's the biologicals that can lead to that unpleasant "dirty socks" smell. So, proper cleaning of the cooling coils can not only save energy but also improve IAQ and IEQ. Please note the emphasis on "proper."

Next


Read These Next

Improve The Efficiency Of The Heating And Cooling Distribution System

With Fault Detection And Diagnostics (FDD), Take Close Look At Buildings, Software Capabilities

Use Economizers To Reduce HVAC Energy Use

Understanding How Fault Detection And Diagnostics (FDD) Tool Works