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SYSTEM SOUND LEVEL System sound level for the PureCycle power system is typically stated as 78 dBa at 10 m. Local codes or ordinances may require sound attenuation if the noise level at a particular distance exceeds a specified threshold. For those purposes, sound levels at various distances are shown in PureCycle® Model 280 Sound Pressure Level (SPL) vs Distance 100.00 95.00 90.00 85.00 80.00 75.00 70.00 1 10 Distance (m) • Assumed omnidirectional sound radiation Figure 7 – PureCycle Model 280 System Sound Level Figure 7 – PureCycle Model 280 System Sound Level WORKING FLUID The PureCycle power system utilizes a hydrofluorocarbon called R245fa (pentafluoropropane) as its working fluid to transfer the heat available in the resource fluid. R245fa is commonly used as a foam-blowing agent for the insulation industry, and is a new refrigerant for centrifugal chillers. By virtue of its lack of chlorine, R245fa has zero ozone depletion potential. With no flash point, the fluid is completely nonflammable. It is not federally regulated with respect to RCRA or the Department of Transportation, and OSHA does not list the fluid for toxicity. It has a global warming potential (GWP) of 950. R245fa is categorized as Category B1 for ASHRAE Safety Standard 15. Typical charge for the PureCycle power system is ~ 3200 lbs (1450 kg). Please refer to the Material Safety Data Sheet (MSDS) for R245fa provided by Honeywell. Only Genetron®® 245fa is acceptable for use in the PureCycle power system. The refrigerant should be stored in a cool, well-ventilated area. Refrigerant is delivered and should be stored in the same DOT containers. Each container holds approximately 1,000 lbs (454 kg) of fluid and has a tare of approximately 400 lbs (181 kg). The containers are designed with fork-lift pockets for easy handling and are approximately 4’ x 4’ x 5’ h (1.2 m x 1.2 m x 1.5 m h). Pratt & Whitney Power Systems recommends a hard shaded surface for working fluid storage. PWPS recommends a 10’ x 10’ (3 m x 3 m) fenced area, segregated from the power plants and utilizing pole-barn-type shade. One to two containers with some fluid and three to four empty containers for holding fluid during machine repair/maintenance activities are recommended. When designing the site, accommodations for the refrigerant storage should be considered. Because the refrigerant should not be mixed with air or oxygen at pressures above atmospheric, the PureCycle system is shipped with a nitrogen charge of 15 psi. Storing the PureCycle power system above 60oF (15.5oC) protects against the introduction of non-condensable gas into the system. Please refer to the PureCycle Model 280 Installation Manual PRMAN66798 for more information. Genetron® is a registered trademark of Honeywell International, Inc. SYSTEM SOUND LEVEL Revision B – 09/23/2009 – Page 15 HTE66510 SPL (dBA)PDF Image | Application Guide Hot Liquid to Electricity 280 kW Power
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