Compressed Air Best Practices - March 2009 - (Page 31) Focus Industry ENERGY MANAGEMENT | 03/09 | ® Step #2: Calculate Amount of Exhaust Air Another important piece of data to know is the amount of exhaust air that is being removed from the factory by dust collectors, furnace exhausts, roof and wall exhausts, etc. Sometimes you can find this data in the environmental survey reports. Another way is to measure the airflow using a Velometer. System nameplate data can be used but is often far different from the actual exhaust flow. HVAC service personnel often have a small probe meter than can be inserted into a duct and determine the flow rate. In my sample factory, the volume of exhaust air is 100,000 cubic feet per minute (cfm). With this data we can roughly calculate the cost of heating the make-up air and then rejecting it back into the countryside. The formula is: differential temperature x flow rate (cfm) x heating hours/yr x cost of gas x 0.00000182 = annual cost 1. 14 degrees x 100,000 cfm x 3,960 hours x $9.80/mmbtu x 0.00000182 = $98,000 per year. Think about this: Every 1,000 cfm of air that is being exhausted costs $1,000 per year or $1.00 per cfm. A small squirrel cage fan of 1 horsepower can eject 3,000 cfm or $3,000 of heated air. www.airbestpractices.com 31 http://www.airbestpractices.com
Table of Contents Feed for the Digital Edition of Compressed Air Best Practices - March 2009 Compressed Air Best Practices - March 2009 Contents From the Editor Utility-Air News Compressed Air Audit of the Month Air Standards Assessment Improves Electroplater Production and Saves Energy Demand-Side System Optimization Seven Sustainability Projects for Industrial Energy Savings Personal Productivity Resources for Energy Engineers Wall Street Watch Advertiser Index Classifieds Compressed Air Best Practices - March 2009 Compressed Air Best Practices - March 2009 - Compressed Air Best Practices - March 2009 (Page Cover1) Compressed Air Best Practices - March 2009 - Compressed Air Best Practices - March 2009 (Page Cover2) Compressed Air Best Practices - March 2009 - Compressed Air Best Practices - March 2009 (Page 3) Compressed Air Best Practices - March 2009 - Contents (Page 4) Compressed Air Best Practices - March 2009 - Contents (Page 5) Compressed Air Best Practices - March 2009 - From the Editor (Page 6) Compressed Air Best Practices - March 2009 - Utility-Air News (Page 7) Compressed Air Best Practices - March 2009 - Utility-Air News (Page 8) Compressed Air Best Practices - March 2009 - Utility-Air News (Page 9) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 10) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 11) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 12) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 13) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 14) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 15) Compressed Air Best Practices - March 2009 - Compressed Air Audit of the Month (Page 16) Compressed Air Best Practices - March 2009 - Air Standards (Page 17) Compressed Air Best Practices - March 2009 - Air Standards (Page 18) Compressed Air Best Practices - March 2009 - Air Standards (Page 19) Compressed Air Best Practices - March 2009 - Air Standards (Page 20) Compressed Air Best Practices - March 2009 - Assessment Improves Electroplater Production and Saves Energy (Page 21) Compressed Air Best Practices - March 2009 - Assessment Improves Electroplater Production and Saves Energy (Page 22) Compressed Air Best Practices - March 2009 - Assessment Improves Electroplater Production and Saves Energy (Page 23) Compressed Air Best Practices - March 2009 - Demand-Side System Optimization (Page 24) Compressed Air Best Practices - March 2009 - Demand-Side System Optimization (Page 25) Compressed Air Best Practices - March 2009 - Demand-Side System Optimization (Page 26) Compressed Air Best Practices - March 2009 - Demand-Side System Optimization (Page 27) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 28) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 29) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 30) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 31) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 32) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 33) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 34) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 35) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 36) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 37) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 38) Compressed Air Best Practices - March 2009 - Seven Sustainability Projects for Industrial Energy Savings (Page 39) Compressed Air Best Practices - March 2009 - Personal Productivity (Page 40) Compressed Air Best Practices - March 2009 - Personal Productivity (Page 41) Compressed Air Best Practices - March 2009 - Personal Productivity (Page 42) Compressed Air Best Practices - March 2009 - Resources for Energy Engineers (Page 43) Compressed Air Best Practices - March 2009 - Resources for Energy Engineers (Page 44) Compressed Air Best Practices - March 2009 - Resources for Energy Engineers (Page 45) Compressed Air Best Practices - March 2009 - Wall Street Watch (Page 46) Compressed Air Best Practices - March 2009 - Wall Street Watch (Page 47) Compressed Air Best Practices - March 2009 - Wall Street Watch (Page 48) Compressed Air Best Practices - March 2009 - Advertiser Index (Page 49) Compressed Air Best Practices - March 2009 - Classifieds (Page 50) Compressed Air Best Practices - March 2009 - Classifieds (Page Cover3) Compressed Air Best Practices - March 2009 - Classifieds (Page Cover4)
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