Automotive Supplier and Paint Facility
No performance or cost information about the air compressor system was available. Multiple air compressors were running in load/unload, without proper control. This resulted in a lot of wasted energy. The team was looking for ways to improve the energy efficiency of their compressed air system and increase awareness of compressed air cost and usage.
To evaluate the system efficiency, we performed an energy audit with the AIRLEADER Data Logger. The Airleader data logger is designed specifically for compressed air audits. It captures data on KW usage, flow information, system pressure load/unload cycles, compressor starts and much more for 7 days using one second readings. The KW usage can be based on 3 phase amp and 3 phase voltage probes. The evaluation software provides us with many data points, in particular the KW/100 CFM allows us to quickly evaluate the overall efficiency of the system based on CAGI Rating of the Compressors we can indicate efficiency improvement potentials.
Energy savings amounted to 31.1 % from 25.8 KW/100 CFM to 17.88 KW/100 CFM, thereby reducing the energy use from 1,774,462 kWh to 1,150,354 kWh for a total savings of 624,108 kWh per year. Over the span of 10 years this amounts to a savings of 6,241 MWH. At an estimated energy cost of 10 cents/kWh this totals to savings of $624,108.
Payback time for this particular installation was 6.9 months.
CO2 savings of this project amounts to 842,545 pounds/year based on the 2000 electricity mix. This energy savings is the equivalent needed to run the electricity of 55 average US households based on 2005 EIA data.
For complete case study details including audit details, graphs, and continuous improvement efforts made possible by the AIRLEADER system please see the linked case study.
First West Michigan AIRLEADER Installation
31.1% Energy Savings
Alan Beatty, maintenance manager at Lacks Enterprises’ Paint East facility, said the Airleader met the company’s interest in conserving energy.
“We have four air compressors, and we were looking at ways to save energy and utilize the compressors more efficiently,” Beatty told MiBiz.
“The Airleader looks at air pressure and demand and selects the right compressor combination to most efficiently achieve the demand at that time.” Beatty said SIGA Green Technologies “came in and did an analysis and basically hit all of the objectives and estimates (they promised).” He added that since the Airleader was installed, he has seen substantial electricity savings at the 107,000-square-foot paint facility. “We know absolutely what that savings is. We went from 0.433 kilowattshours per 100 CF (26.0 KW/100CFM) to 0.298 kilowattshours per 100 CF (17.8 KW/100 CFM)” for air compressor operations, he said. “That’s a savings of 31.1 percent”.