Compressed Air Best Practices - September 2008 - (Page 17) Focus Industry FOOD PACKAGING & PROCESSING | 09/08 | A new contaminant removal system will be installed which matches the maximum output of the new air compressor. This will include an oil- coalescing pre-filter, a regenerative desiccant air dryer and a solid particulate after filter. We will have eliminated the potential oil carryover problem from the existing air compressors and have an appropriately sized contaminant removal system which can remove oil to 0.01 ppm and provide a pressure dew point of -40 °F. The new pressure drop on this system will be 5–7 psig (including filters) rather than the current 12–20 psig. System Total hp Total acfm Energy Cost 10-Year Life Cycle Cost Audited System New System* * 210 hp 150 hp 891 acfm 752 acfm $64,545 $35,045 $640,545 $350,045 Investment required of $57,200. Yearly energy savings of $29,500. Simple payback of 1.9 years. E. Summary As a result of the audit, the facility has found a way to plan for the future while optimizing current energy costs and air quality. The older yet well-maintained air compressors are now on stand-by. The new air compressor is able to produce energy savings of $29,500 per year due to its ability to perform efficiently at partial loads. The new air compressor also has the capacity to handle planned future expansion. Air quality concerns over dew point and oil contamination have been resolved with properly sized coalescing filters and a desiccant air dryer. The pressure drop across the air dryer has also been reduced by up to 8 psig. These pressuredrop savings (of approximately 4%) are not factored into the audit ROI financials. For more information, please contact Mr. Lane Hollar, Senior Systems Auditor, Air Flow Inc., tel: 336-605-9622, email: lhollar@airflowinc.com, www.airflowinc.com 17 http://www.mcintireco.com http://www.mcintireco.com http://www.airflowinc.com
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