Slide 1 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Performance Tested HVAC Presentation to the RTUG January 19, 2010

Slide 2 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N 2009 RTU Service Pilot Performance Tested HVAC  Thermostat measures –Replacement –Setpoint and schedule changes  Economizer measures –Economizer commissioning  Setpoint changes  Fixing dampers  Replacing or repairing broken parts –Minimum and maximum ventilation adjustment  Refrigeration cycle measures –Condenser and evaporator coil cleaning –Refrigerant charge adjustment –System airflow adjustment

Slide 3 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Service Diagnostic Elements 1.RTU operational check -does everything work? 2.Document existing conditions Clean coils 3.Test and document existing economizer and operation 4.Document existing economizer equipment 5.Test and document existing economizer operation 6.Check thermostat: stages, setpoints and schedules and adjustment 7.Minimum outside airflow measurement and adjustment 8.Maximum outside airflow measurement and adjustment 9.System airflow measurement and adjustment 10.Refrigerant system check 11.Refrigerant system adjustment 12.Refrigerant charge adjustment

Slide 4 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Service Elements 1.Pkg A1: Replace sensor 2.Pkg A2: Add OSA relay for morning warm-up 3.Pkg B: Fix Damper 4.Pkg B1: Fix Damper + Replace sensor 5.Pkg B2: Fix Damper + Add OSA relay for morning warm-up 6.Pkg C: New Thermostat 7.Pkg C1: New Thermostat + Replace sensor 8.Pkg C2: New Thermostat + Add OSA relay for morning warm-up 9.Pkg D: New Economizer Controller 10.Pkg D1: New Economizer Controller + Replace sensor 11.Pkg D2: New Economizer Controller + Add OSA relay for morning warm-up 12.Pkg E: DCV 13.Pkg F: New Economizer Controller + New Thermostat 14.Pkg F1: New Economizer Controller + New Tstat + Replace sensor 15.Pkg G: New Economizer

Slide 5 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Metered Savings  161 RTUs metered  102 RTUs in Puget Sound, Tri-Cities and Spokane areas with complete post-servicing data  Mean cooling and fan energy savings: 1,615 kWh per unit

Slide 6 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N : 172 kWh per ton Average Metered Savings (kWh/Ton): 172 kWh per ton

Slide 7 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Normalized Metered Savings: 234 kWh per ton

Slide 8 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N  Benefits: –Programmatically simple –Supported by research to date –Enables BPA to gather more data to inform regional program –Low risk (< 0.05 aMW)  Future planned research: –Annual metering of 49 RTUs –Summer of 2010 RTU research  Meter 10% of RTUs, up to 50  Timing: –Annual metering results ready winter 2011 –Preliminary results spring 2011 –Recommend sunset date in 2 years Recommend: Provisionally Deemed Value of 200 kWh per ton