By Mark E. Schaffer
A advisor that provides ideas for controlling the noise and vibration of HVAC platforms.
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Extra resources for A Practical Guide to Noise and Vibration Control for HVAC Systems
Arrange the equipment and duct shaft locations for smooth airflow at the recommended velocity and pressure drop. 2. When two supply fans (centrifugal or vane-axial) are to operate in parallel, arrange them in a “Y” discharge arrangement as shown in Figure 1-12. Figure 1-12 Examples of rumbly and quieter parallel fan installations. 15 © 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.
Airside Equipment Figure 2-15 Ultra-low-noise propeller fan with backswept airfoil blades. 3 m for very large capacities. Figure 2-16 Lined hood for propeller fan noise control. 38 © 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. A Practical Guide to Noise and Vibration Control for HVAC Systems Figure 2-17 Vibration isolation suspension for propeller fans.
C. If the central plant is located next to a stair, duct, or elevator shaft, the common wall should be either masonry or a multi-layer gypsum board construction, depending on the noise levels of the central plant equipment. d. In critical installations, the extensions of floor drains beneath the central plant floor (above an occupied space ceiling) may require either a gypsum board enclosure or pipe lagging. Figure 1-11 shows a photo of a pipe lagging product. 5 to 10 kg/m2 (denser is better). Figure 1-10 Electrical conduit routing into a mechanical room.