CxEnergy 2022 Proposed Abstracts for Preliminary Program

Technical Program

Technical presentations will be approved for the following CEUs: AIA (LU), USGBC LEED General Education CE, CxA, EMP CE, and AABC (TBE & TBT) CE.

System Airflow Leakage and Deflection Testing

Gaylon Richardson, TBE, CxA, Engineered Air Balance Co., Inc.

The presentation will cover the following:

Learning Objective 1: 
For a system with x airflow what is the maximum air leakage?

Learning Objective 2: 
Are there considerations for pressure class rating of the duct system and Air Handling Unit?

Learning Objective 3: 
What is the best practice for a design engineer to specify the allowable duct leakage rate for the entire system?

Learning Objective 4: 
Establish responsibilities for the: Engineer, Contractor, and TAB.

Learning Objective 5: 
Discuss SMACNA’s Leakage Classes and AHRI’s Standard 1350 for AHU Casing Leakage

The Benefits of Pressure Independent Valves in HVAC Systems

David Riffle, Belimo

This presentation will provide an overview of the different types of pressure independent
valve technology available to the HVAC industry. There will be a review of installation
best practices, applications and the balancing processes associated with pressure
independent valves. Furthermore we will look at the benefits pressure independent
valves have on the central energy plant. To conclude the concept of “dynamic
balancing” and how it aligns with the efforts of the balancing community will be

Learning Objective 1: 
Gain a baseline understanding of pressure independent valve technology.

Learning Objective 2: 
Understand where pressure independent valves are used in hydronic heating
and cooling systems and why.

Learning Objective 3: 
Learn how pressure independent valve technology positively impacts hydronic
system performance and the associated advantages.

Learning Objective 4: 
Develop an understanding of “dynamic balancing” and how it supports the
balancing community’s efforts.

todd yates synergy test and balance

Airflow Measurement & Control with Induction Diffuser Technology

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 Objective 1: 
Describe issues related to balancing induction diffusers

Learning Objective 2: 
Discuss effective coordination with project stakeholders on technical issues and expectations

Learning Objective 3: 
Describe alternative methods of measuring airflow in induction diffusers.

Distributed Pumping in Chilled Water Systems

L. Peter Korzeniewski, LEED AP, Grundfos – Commercial Building Services
The last mile for any project is always the most difficult and expensive. This certainly holds true for designing and building commercial buildings and their mechanical systems. For a chilled water system the last mile is balancing. Grundfos Distributed Pumping is the next generation of chilled water system design: Variable Primary / Distributed Secondary. This revolutionary, yet simple system design consists of a chillers and pumps in a variable primary configuration, connected to a distributed secondary via a 4-temperature bypass. Intelligent pumps are installed at each load in the system and not only provide precise flow and pressure directly to each load, they are auto-balanced upon installation and throughout the chilled water system’s life cycle. Simplifying installation, maximizing occupant comfort, saving pump energy and significantly impacting the chiller plant’s Delta T.

Learning Objective 1: 
The evolution of chilled water piping layouts

Learning Objective 2: 
Distributed Pumping concept

Learning Objective 3: 
Designing and sizing a distributed pumping system

Learning Objective 4: 
Pressure profile of comparison to a conventional system

Learning Objective 5: 
TOTEX (CAPEX + OPEX) comparison

Healthcare Facility Compliance; Best Practices for an Independent, AABC Total System Balance Approach

Brian Venn, TBE, CxA, Mechanical Testing, Inc.
Jeremy Johnson, TBE, CxA, American Testing, Inc.
Cody Shook, TBE, CxA, Precision Flow Engineering

In a hospital environment, proper ventilation is critical for patient and staff health and has strict regulations and reporting associated with it. The Total System Balancing (TSB) agency must possess a breadth of knowledge in many systems and ideally have ample experience in this very specific type of construction.  This presentation will provide an overview of the Total System Balancing (TSB) approach, beginning with the design to the final report to the owner’s representatives.

Learning Objective 1:
Be able to explain the Total System Balance Approach, from the design phase to project closeout.

Learning Objective 2:
Understand what role proper controls integration/BAS play for optimal calibration.

Learning Objective 3:
Know which reports should be provided throughout the entire process and when.

Learning Objective 4:
Understand the owner/owner representative’s role throughout the process.

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