Compressed Air Metering, Auditing, and the IPMVP Presented By Sam - - PowerPoint PPT Presentation
Compressed Air Metering, Auditing, and the IPMVP Presented By Sam Dick of Comairco Equipment Ltd. Energy Summit, May 30, 2018 Presenter Sam Dick, CMVP B.Eng. Mechatronics from McMaster University Lead Auditor for Ontario at
Metering, Auditing, and the IPMVP
Presented By Sam Dick of Comairco Equipment Ltd. Energy Summit, May 30, 2018
Presenter
University
Equipment
– saveONenergy, Industrial Accelerator
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Compressed Air Energy Intensive Often Misused Big Savings Opportunities
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Let’s get some savings!
We’ll replace our old inlet modulation compressor with a new variable speed compressor
What could go wrong?
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What Will Our Savings Be?
Baseline Avg. Reporting Avg. Predicted Savings ~40 kW
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What Will Our Savings Be?
Baseline Avg. Reporting Avg. Predicted Savings ~40 kW
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What Will Our Savings Be?
Baseline Avg. Flow Increase Reporting Avg.
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What Happened to Our Savings?!
Adjusted Baseline Reporting Avg. Actual Savings ~20kW
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What Happened to Our Savings?!
After adjustments our savings were cut in half
– Savings will depend on FLOW (CFM) – The power-flow relationship is NONLINEAR – Flow can be very DYNAMIC
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Savings Depends on Flow
Predicted Savings ~ 40 kW Adjusted Savings ~ 20 kW
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Measurement and Verification
International Performance Measurement and Verification Protocol (IPMVP)
“...to help ensure the accurate assessment of investment in energy efficiency”
Savings = [Baseline Period Energy – Reporting Period Energy] +/- Adjustments
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Measurement and Verification
– Options C and D not ideal for compressed air
– More assumptions, less measuring – Justify your assumptions!
– Measure power, pressure, flow, production – Anything else?
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Measurement and Verification
– Measure compressor kW before and after leak repairs – Assume that pressure, production, and operating hours have not changed – Justify your assumptions!
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Measurement and Verification
– Measure all key parameters before and after leak repairs
discharge flow, production volume,
– Assume that other factors are negligible – Justify your assumptions!
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Measurement and Verification
– Pressure (psig, kPag, barg)?
power-flow relationship
– Production (units/day, tons/week, etc.)?
– Flow (CFM, m3/h)?
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FLOW, FLOW, FLOW
– To better understand your air usage – To verify a change in air usage – To size the optimal equipment – To predict energy savings
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FLOW, FLOW, FLOW
– Yes, but be careful! – Requires kW and pressure data – Requires performance data – Requires production data – Accuracy is at best +/- 10%
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Flow Meters
– Orifice plate, pitot tube, annubar – Measures differential pressure and calculates flow – High cost, high range, poor accuracy at low level – Often requires pressure or temperature compensation
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Flow Meters
– Ring style, probe style – Measures thermal dispersion and calculates flow – Lower cost, limited range, better accuracy at low levels
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Flow Meters
– Clamps on to outside of pipe – Completely non-intrusive – High cost, good range, maximum flexibility
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Flow Meters
measuring laminar flow only
accurately
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3” Flow Meter Comparison
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3” Flow Meter Comparison
Watch out for low level accuracy!!
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3” Flow Meter Comparison
ULTRASONIC
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What could go wrong?
Savings will depend on FLOW (CFM) The power-flow relationship is NONLINEAR Flow can be very DYNAMIC Follow M&V best practices (IPMVP)
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Contact
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