Test and Balance Seminar for CxAs, Engineers, and TAB Professionals in conjunction with CxEnergy 2022 Conference and Expo.
V. Todd Yates, PE, TBE, CxA, Synergy Test & Balance
A multi-floor university building project has central AHUs serving VAVs with induction diffusers. Because airflow at induction diffusers cannot be measured directly with a flow hood, instead they are measured by pressure drop at factory installed ports. Initial work showed that VAV traverses were significantly different than induction diffuser readings. Resolving this conflict required input from the owner, designer, contractor, equipment manufacturer, and Cx provider.
Explain operating principles of induction diffusors
Learning Objectives
- Describe issues related to balancing induction diffusers.
- Discuss effective coordination with project stakeholders on technical issues and expectations.
- Describe alternative methods of measuring airflow in induction diffusers.