Rainier Veneer Achieves Significant Energy Savings Through Compressed Air System Optimization with Air Receiver Tanks

Background:
According to Maintenance Supervisor Lenny Becraft, Rainier Veneer, located in Washington State, USA, might not have upgraded its compressed air system without encouragement from Tacoma Power. However, facing growing pressure from energy consumption and costs, the company took initiative to improve system efficiency.

Project Overview & Role of the Air Receiver Tank:
To reduce operational costs and maintain air quality, Rainier Veneer implemented a comprehensive compressed air system upgrade. Key equipment installations included:

• A 150-horsepower variable speed rotary screw compressor

• An 800 CFM refrigerated air dryer

• A 1,060-gallon air receiver tank

During this upgrade, the 1,060-gallon air receiver tank played a critical role:

• Backup Reserve: It provided sufficient compressed air storage to meet sudden demand surges in the plant, preventing excessive compressor cycling.

• Cycle Reduction: The presence of the tank enabled the air system to run on longer load cycles, reducing unnecessary idle or short-cycling, and in turn, lowering wear on switches and mechanical components.

• Pressure Stabilization: By supplying a steady stream of compressed air, the tank helped maintain consistent system pressure, ensuring smooth operation of production equipment.

Financial Analysis & Outcomes:
The project delivered significant financial and operational results:

• Annual electricity savings: 444,849 kWh

• Total project cost: $109,218

• Incentive from Tacoma Power: $76,264

• Net customer cost: $32,954

• Estimated annual cost savings: $16,278

• Payback period: Only 2 years

Conclusion:
Gary Johnson, a mechanical engineer from Tacoma Power, played a pivotal role in helping Rainier Veneer secure the substantial rebate. He noted that the project not only helped the customer reduce energy expenses, but also improved system efficiency and strengthened the customer relationship. This case clearly demonstrates that by investing in an optimized compressed air system—including a properly sized air receiver tank—companies can achieve substantial energy savings, reduce operational costs, and enhance overall system reliability, leading to a strong return on investment within a short period.