Compressed Air Best Practices - September 2008 - (Page 13) Focus Industry FOOD PACKAGING & PROCESSING | 09/08 | C. Air Compressor Configuration The three air compressors in the compressor room are supporting the plant. All are using food-grade lubricants. The 30-hp air compressor in the boiler room only kicked on once during the audit period — due to some scheduled maintenance of the 100-hp machine. This audit therefore focuses on the three air compressors in the compressor room. The Compressor Room The 100-hp air compressor is a lubricated, single-stage rotary screw. It is controlled by an inlet modulation valve and has a sump blowdown. The machine can deliver 440 acfm and is running between 20–50% of its capacity. The annual cost of energy consumption of this machine is $28,617. The 60-hp air compressor is a lubricated, singlestage rotary screw. It has a load/unload control system. The machine can deliver 251 acfm and is running between 21–50% of its capacity. The annual cost of energy consumption of this machine is $19,760. The 50-hp air compressor is a lubricated, single-stage rotary screw. It is controlled by an inlet modulation valve and has a sump blowdown. The machine can deliver 200 acfm and is running between 20–50% of its capacity. The annual cost of energy consumption of this machine is $16,168. The manner in which the compressors are being operated does need to be addressed. For the majority of the audit period, three of the air compressors were running (the 100-hp, the 60-hp and the 50-hp units). This equates to 210 hp of air compressors in use and a combined cfm delivery capacity of 931 cfm. The air compressors do not have the ability to unload and shutdown when not needed, nor can they modulate back to lower hp levels when the plant demand is low. CP Compressors 1800 Overview Drive Rock Hill, SC 29730 support@cpcompressor.com CP Compressors Canada 125 McBrine Place #2 Kitchener, Ontario, N2R 1G4 Distributor Opportunities Available 1-800-528-5192 13
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