Noise-Con 2014 Attendees Learn about HVAC Noise Control from Trane Specialists


Noise-Con 2014 Attendees Learn about HVAC Noise Control from Trane Specialists

Trane also will feature its experience with the Stealth air-cooled chiller which offers the industry’s lowest published sound levels

Fort Lauderdale, Fla. Sept. 8, 2014 — Trane, a leading global provider of indoor comfort solutions and services and a brand of Ingersoll Rand, will feature the newest addition to its air-cooled chiller product portfolio, the Trane Stealth™ air-cooled chiller, and discuss strategies for noise control in heating, ventilation and air conditioning (HVAC) solutions at Noise-Con 2014, held Sept. 8-10, 2014, at the Westin Beach Resort, 321 North Fort Lauderdale Beach Blvd. in Fort Lauderdale, Fla.

Trane will showcase its experience with the Stealth chiller at its booth, #113. Available in the 150-300 ton capacity range, Trane® Stealth™ air-cooled chillers deliver the highest combination of part-load and full-load efficiencies and the lowest published sound levels.

Quiet operation is designed into every Stealth air-cooled chiller as standard, along with two optional InvisiSound™ acoustic reduction treatments available to meet specific application needs. Attendees will be able to experience reproductions of the standard and optional acoustic reduction treatments at the Trane booth.

The key to low sound levels is the combination of variable-speed compressors, variable-speed condenser fans designed for low noise applications, and an integrated compressor muffler. Because variable-speed compressors and condenser fans only operate as fast as demand levels require, their overall sound levels are less than those of constant-speed units. The integrated compressor muffler reduces sound even more — up to 10 decibels when compared to the previous compressor designs.

For additional sound reduction, the InvisiSound Superior package adds acoustical treatments to key sound-generating components. For installations that require the lowest published sound levels for an air-cooled chiller, the InvisiSound Ultimate package features a user-selectable noise-reduction mode that can be activated to limit the maximum condenser fan speed, achieving even lower sound levels and unit operation management to comply with nighttime and weekend noise restrictions.

Trane leaders discuss noise management
Trane leaders will discuss a variety of acoustical topics at the conference:

Bill Rockwood, senior principal engineer and modeling team lead for Trane, and Tim Garvin, acoustic engineer for Trane, will discuss how to control fan-motor vibration across families of HVAC units. Operational vibration is a key factor in HVAC unit design and quality control. The presentation will examine the dynamic characteristics of a typical line of air-moving equipment comprised of cabinets, fans, motors, fan/motor support bases and internal vibration isolation systems. Presenters will offer a methodology for assessing the relative risks of excessive vibration across the complete product matrix, and share selected validation results.

Presentation details:
Title: A Strategy for Controlling Fan-Motor Vibration across Broad HVAC Unit Configuration Matrices
When: Sept. 9 at 1:40 p.m.
Where: Room Las Olas III at Westin Beach Resort & Spa

Jack Wang, lead engineer in modeling and simulation for Trane, will discuss compressor sound and the corresponding noise control methods. Compressor sound levels vary with the operating conditions by as much as 10 decibels or more, depending on compressor types and sizes. The compressor sound characteristics also can change drastically when the mechanical unloading mechanism starts to change refrigerant flow conditions. Wang will present examples of the sound characteristics of typical centrifugal, screw, and scroll compressors, and review typical noise control methods and effects from an HVAC equipment manufacturer’s sound control point of view.

Presentation details:
Title: Understanding Compressor Sound and Noise Control Methods
When: Sept. 9 at 1:20 p.m.
Where: Room Las Olas III at Westin Beach Resort & Spa

Steve Lind, acoustic engineer for Trane, will discuss the variation over time in reference sound source power levels. The reference sound source (RSS) is critical to sound power measurements that follow the comparison method such as Air Conditioning Heating and Refrigeration Institute (AHRI) Standard 220 or American National Standard ANSI/ASA S12.58.  Any error or variation in the sound power of the RSS will be directly added to the sound power of any equipment that uses the RSS in its sound power measurement. Lind will address the variation in sound power level of several RSSs over multiple years. 

Presentation details:
Title: Variation over Time for Reference Sound Source Sound Power Levels
When: Sept. 9 at 1:00 p.m.
Where: Room Las Olas IIIat Westin Beach Resort & Spa

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About Noise-Con 2014
Noise-Con 2014, the U.S. National Conference on Noise Control Engineering, is being held in Fort Lauderdale, Fla., from Monday, Sept. 8, through Wednesday, Sept. 10, 2014. The Technical Program for Noise-Con 2014 features a large, broad program of sessions on a variety of noise control topics. In addition, the conference features a large exposition of vendors for noise control materials, software, and measurement devices.

About the Presenters

About Bill Rockwood
Bill Rockwood is Ingersoll Rand’s Modeling & Simulation Network of Excellence “3D Fluids Simulation” leader.  Since joining Trane in 1993, Rockwood has participated in design teams spanning numerous product lines focused on sound and vibration control, structural integrity, and fluid flow engineering. Prior to joining Trane, Rockwood was an engineering consultant with Colin Gordon and Associates in San Francisco, Calif., and lead propulsion systems acoustic engineer with Westinghouse in Sunnyvale, Calif.  Rockwood holds a Bachelor’s degree in Engineering from Dartmouth College and a Master’s degree in Applied Mechanics from Stanford University.   

About Tim Garvin
Tim Garvin is an acoustics engineer in the Applied Acoustics and Mechanics group at Trane in La Crosse, Wis.  Since joining Trane in 1991, Garvin has been a member of design and development teams for compressors, chillers, and air handlers focusing on structural integrity, vibration, and sound.  He is also responsible for the development of internal structural and vibration standards within Trane. Prior to joining Trane, Garvin worked as a development engineer at Caterpillar in Peoria, Ill., and a design engineer at the Naval Surface Weapons Center in Dalhgren, Vir. Garvin  holds a Bachelor’s of Science degree in Engineering from Ohio University and a Master of Science in Engineering from the University of Pittsburgh. 

About Jack Wang
Jack Wang is a lead engineer in modeling and simulation network of excellence at Trane, a brand of Ingersoll Rand. Since joining Trane in 1999, Wang has engaged in product design and development teams for fans, compressors and chillers, focusing on sound and vibration, structure, and fluid flow.  Recently, his work extends to other Ingersoll Rand products in transport and residential HVAC, and material handling. Wang is active in ASHRAE, and is the current chairman for both TC2.6 vibration isolation subcommittee and SPC 197 committee on method of test for vibration isolators.  Wang received his doctorate degree in Acoustics from the Pennsylvania State University.

About Steve Lind
Steve Lind is an acoustics engineer in sound and vibration testing at Trane and focuses primarily on measuring sound for Trane air conditioning systems. He is also active in the Air Conditioning Heating and Refrigeration Institute’s Technical Committee on Sound and on the Acoustical Society of America’s Standards Committees S1 and S12. Lind received a Bachelor of Arts degree in physics from the University of Northern Iowa and a Master of Science degree in engineering in acoustics from the University of Texas at Austin.

About Ingersoll Rand and Trane
Ingersoll Rand (NYSE:IR) advances the quality of life by creating comfortable, sustainable and efficient environments. Our people and our family of brands—including Club Car®, Ingersoll Rand®, Thermo King® and Trane® —work together to enhance the quality and comfort of air in homes and buildings; transport and protect food and perishables; and increase industrial productivity and efficiency. Trane solutions optimize indoor environments with a broad portfolio of energy efficient heating, ventilation and air conditioning systems, building and contracting services, parts support and advanced control. Ingersoll Rand is a $12 billion global business committed to a world of sustainable progress and enduring results. For more information, visit or