Mark E. Schaffer's A Practical Guide to Noise and Vibration Control for HVAC PDF

By Mark E. Schaffer

ISBN-10: 1461917573

ISBN-13: 9781461917571

A advisor that provides principles for controlling the noise and vibration of HVAC platforms.

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Extra info for A Practical Guide to Noise and Vibration Control for HVAC Systems

Example text

Figure 2-11 shows a fan installation with a duct silencer inserted between the fans and their curbs. Large mushroom fans installed near noise-sensitive or vibration-sensitive areas may be mounted on roof curbs with internal isolation. A sketch of such a curb is shown in Figure 2-12. Panel Fans Panel fans, which use propeller fan wheels, are typically selected for unducted, low static pressure applications. ), so be sure to consider them all when selecting a propeller fan for a noise-sensitive application.

Org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. Airside Equipment Figure 2-7 Guidelines for ducted axial flow fan installations. 32 © 2011 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission.

This section of the guide deals specifically with the selection of fans in all of their likely applications. The acoustical performance of AHUs is addressed later in this chapter. The first step in selecting a fan for a noise-sensitive application is to select the quietest equipment available for the most likely operating condition. , airflow and system static pressure. In variable air volume (VAV) systems, the selection should be made for the most likely range of part-load operating conditions (typically in the range from 60% to 85% of full capacity).

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A Practical Guide to Noise and Vibration Control for HVAC Systems by Mark E. Schaffer


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