In the Blogs at csemag.com

David Sellers, who blogs “A Field Guide For Engineers” posted the first part of a discussion on damper tests at the end of May, and has already posted Part 7B. “I recently had a chance to test the flow vs. damper blade position characteristics for the AHU1 economizer dampers at the Pacific Energy Center (PEC),” Sellers said.

07/01/2007


David Sellers, who blogs “A Field Guide For Engineers” posted the first part of a discussion on damper tests at the end of May, and has already posted Part 7B. “I recently had a chance to test the flow vs. damper blade position characteristics for the AHU1 economizer dampers at the Pacific Energy Center (PEC),” Sellers said. “We discovered a few interesting things, including that theory didn't match reality, at least for our test.”

In Part 2, he looked at the scoping process that led his researchers to develop the test, and he said that readers may find these techniques useful in their own projects. Part 3 looked at techniques that allowed the researchers to assess the performance of the economizer dampers in an air-handling unit. In the post, he discussed why low damper velocities and non-linear damper performance might be cause for concern with respect to economizer damper performance. In Part 4, the researchers said that economizer damper velocity affects the ability of outdoor air and return airstreams associated with an economizer process to mix. Higher velocities translate to more momentum, allowing one airstream to penetrate the other and promote mixing.

Part 5 launched into the testing background, and Part 6 introduced the notion that minimum outdoor air requirement for the facility fell into three components: air required for ventilation purposes, air required to make up for the kitchen hood exhaust, and air required to ensure positive pressurization in the entry lobby. Finally, Parts 7A and 7B describe the test results.



Forum

Educational Opportunities

The webcast, “Power Quality: Understanding Harmonics” hosted by Plant Engineering magazine is available in the webcast archives at

The Construction Specifications Institute and BuildingGreen, Inc., have agreed to work together on the implementation of GreenFormat™, an online reference source of green building product and manufacturers, at



No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Combined heat and power; Assessing replacement of electrical systems; Energy codes and lighting; Salary Survey; Fan efficiency
Commissioning lighting control systems; 2016 Commissioning Giants; Design high-efficiency hot water systems for hospitals; Evaluating condensation and condensate
Solving HVAC challenges; Thermal comfort criteria; Liquid-immersion cooling; Specifying VRF systems; 2016 Product of the Year winners
Driving motor efficiency; Preventing Arc Flash in mission critical facilities; Integrating alternative power and existing electrical systems
Putting COPS into context; Designing medium-voltage electrical systems; Planning and designing resilient, efficient data centers; The nine steps of designing generator fuel systems
Designing generator systems; Using online commissioning tools; Selective coordination best practices
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
click me