COST OF COOLING Robert Eppich– Eppich Technologies; AFS Energy Coordinator Rob Lepage– bitCraft Embedded Energy Solutions.

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Presentation transcript:

COST OF COOLING Robert Eppich– Eppich Technologies; AFS Energy Coordinator Rob Lepage– bitCraft Embedded Energy Solutions

Equipment that must be Cooled Electronic Control Cabinets Amine Gas Generators

Typical Approach Open the cabinet door Open the door and set a fan in front of cabinet Open the door and blow compressed air on the component If the above fails – do something different

What’s Something Different Install a vortex cooler Air is always available No maintenance is required Relatively inexpensive to buy

Vortex Cooler Spin Compressed Air at High Velocity Hot to the outside Not Adiabatic Cooling Spin Compressed Air at High Velocity Hot to the outside Cold to the inside

Not the Whole Story 1500 Btu/hr With dew point of air at -40F At 100 psi Ambient around 75F Actual Rating - around 625 Btu/hr With dew point of air at +40F Air Pressure at 70psi Compressed air temperature at 100F

Operating Costs Associated with a 1500 Btu/hr Vortex Cooler at Various Flow Rates

Cooling Evaluation Program in Wisconsin Instrument two control cabinets Neenah Foundry, Neenah WI AFS Corporate member Save Energy Now Leader Neenah currently has 68 vortex cooling units in operation Annual cost $3000 each. Running 24-7

Instrument two control cabinets Cabinet temperature visual alarm Data logger with GSM/cell phone upload to website Electrical power meter Cabinet and ambient temperature probes Instrumentation power input Instrumentation power Monitored power duplex receptacle Compressed air flow meter Cabinet Cooling Instrumentation System

Energy savings Annual cost of operation: $3000 ea. @ .07 KwH = 42,857 KwH each vortex cooler 68 vortex coolers = 2,914,285 KwH Preset temp controller to 85oF with shut off over temp. Min 50% reduction in energy Units were essentially over cooling and running too much.

Operating Cost in May 2010 for AC vs. Vortex Operating Cost for vortex cooler $87/hot month plus purge air of 2cfm ($18/month) Operating Cost for Conventional AC Unit $3.20/hot month plus purge air of 2cfm ($18/month)

ALTERNATIVES

CHOOSE WISELY Don’t Overcool Find out the maximum recommended cabinet operating temperature There are alternatives AC Units (will cool below ambient) Thermoelectric (will cool below ambient) Heat Pipes (will not cool below ambient) Don’t Overcool