Compressed Air Best Practices - March 2008 - (Page 21)

Focus Industry FOOD PROCESSING | 03/08 | Audit Recommendations Recommendation #1: Install Air Storage and Intermediate Flow Controller Reduce artificial demand of the air system through the use of storage and an Intermediate Controller to maximize horsepower on-line. Please note, Midwest Bakery’s rotary screw air compressors are set to run at 110/125 psig, yet we are operating equipment from 86–109 psig in the main distribution system. Artificial demand is demand created by increasing the pressure above the point actually necessary to run the plant. Existing Conditions Average Flow Horsepower On-Line Pressure Range Avg. kW Usage Proposed Air System Average Flow Horsepower On-Line Stable Pressure Avg. kW Usage Potential Savings Cfm Savings Bhp Savings kWw Savings Operational Hours Cost Per kW Total First Year Savings Looking for water in dry places? To manage moisture in compressed air, measure it correctly. Rely on Vaisala DRYCAP® dewpoint instruments. Fast and accurate measurements with portable and fixed instruments Patented auto-calibration performance maintains long term stability Full recovery from condensation Be sure your airis dry – depend on Vaisala DRYCAP! New DRYCAP® Transmitter Series DMT340 displays trends and one-year history. 1787 cfm 644 bhp 86–109 psig 500 kWh 1587 cfm 389 bhp 85 psig 302 kWh 200 cfm 255 bhp 198 kWh 8760/Year $0.045322 $ 78,672 www.vaisala.com Vaisala Inc. Tel: 1-888-VAISALA (824-7252) Fax: 781-933-8029 instruments@vaisala.com Equipment Required: Five Compressor Sequencer, PC Visualization, 10,000 Gallon Receiver, Flow Controller Start Up Installation Estimate $35,000 Investment $ 64,141 ROI Estimate 1.26 Years This recommendation will convert the plant air system from a “REACTIVE” system to a “MANAGED” system. The combination of proper storage and an intermediate controller will result in energy savings and eliminate excess horsepower on-line while ensuring system integrity. Receiver capacity is needed to absorb the cfm demand spikes and keep the input source(s) sensing average demand rather than peak demand. Without a controlled pressure differential on both sides of the receiver, there is no useful storage. Without storage, the system must allow system pressure to decay in order to use it. Without proper storage, the system must operate at a higher-pressure with enough input generation on-line to adequately support any change or event which may occur in the system. No system can afford the financial and operational consequences of not having enough storage (capacity) to adequately satisfy the largest event without requiring additional horsepower. www.airbestpractices.com 21 http://www.vaisala.com http://www.vaisala.com http://www.airbestpractices.com

Table of Contents Feed for the Digital Edition of Compressed Air Best Practices - March 2008

Compressed Air Best Practices - March 2008 Contents From the Editor Utility-Air News The Compressed Air Audit of the Month: Saving Energy with Blowers in Canada Do You Provide World-Class Service? Managing Rotary Screw Air Compressors at Midwest Bakery The Difference Between Acfm and Scfm for Proper Vacuum Sizing Best Practices — Multi-Module Process Air Dryers The Vacuum Formation Process in Building Compressed Air Filter Elements Solberg Manufacturing Real World Best Practices: Measuring Pressure Dewpoint in a Compressed Air System Resources for Energy Engineers: Training Calendar & Product Picks Wall Street Watch Advertiser Index Job Market

Compressed Air Best Practices - March 2008

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