Energy Stewardship Program TAMU – College Station

Energy Stewardship ProgramTAMU – College Station

Energy Stewardship TeamEnergy Stewardship Team

Charlie Shear ‐ Supervisor Energy Stewardship

Keith BornmannEnergy Steward

Dr. Jorge LaraEnergy Steward

Don FazzinoEnergy Steward

Johnny SmithEnergy Steward

Jack CookEnergy Steward

Betty MorganEnergy Steward

2

ESP EffortsESP EffortsHVAC SchedulingESCOLightingPC / ServersFume HoodsBuilding System RepairsEnergy Opportunity Assessment ProgramBuilding Use AdjustmentsHoliday Break AdjustmentsProactive Campus InvolvementEventsReporting

HVAC SchedulingHVAC SchedulingSecond Floor of 1800 GSC

AHU AHU Schedule Box Name T Stat Room/Location

Rooms Served Room Description Space Category Proposed OCC

Temp Proposed OCC Schedule Proposed Unocc Temp Proposed Unocc Schedule Notes

AHU 2‐1 (M ‐ F) 6:00 AM ‐ 7:00 PM FVV2‐5 2823 2821 Staff Office Offices 70h ‐ 75c (M) 6:00 AM ‐ 7:00 PM (T ‐ F) 7:00 AM ‐ 7:00 PM 60h ‐ 85c

600 pm ‐ 600 am (M) 600 pm ‐ 700 am (T‐F)

All Weekend

0 CFM during unoccupied hours


600 pm ‐ 600 am (M) 600 pm ‐ 700 am (T‐F)

All Weekend


AHU 2‐1 (M ‐ F) 6:00 AM ‐ 7:00 PM FVV2‐5 2823 2823 Office Storage Offices 70h ‐ 75c (M) 6:00 AM ‐ 7:00 PM (T ‐ F) 7:00 AM ‐ 7:00 PM 60h ‐ 85c

600 pm ‐ 600 am (M) 600 pm ‐ 700 am (T‐F)

All Weekend



600 pm ‐ 600 am (M) 600 pm ‐ 700 am (T‐F)

All Weekend


AHU 2‐1 (M ‐ F) 6:00 AM ‐ 7:00 PM FVV2‐4 2820 2820 General Administrative Office Offices 70h ‐ 75c (M) 6:00 AM ‐ 7:00 PM

(T ‐ F) 7:00 AM ‐ 7:00 PM 60h ‐ 85c600 pm ‐ 600 am (M) 600 pm ‐ 700 am (T‐F)

All Weekend


AHU 2‐1 (M ‐ F) 6:00 AM ‐ 7:00 PM FVV2‐19 2826B 2826A Support Office Offices 70h ‐ 75c (M) 6:00 AM ‐ 7:00 PM (T ‐ F) 7:00 AM ‐ 7:00 PM 60h ‐ 85c

600 pm ‐ 600 am (M) 600 pm ‐ 700 am (T‐F)

All Weekend


AHU 2‐1 (M ‐ F) 6:00 AM ‐ 7:00 PM FVV2‐19 2826B 2826B Office Equipment Support Offices 70h ‐ 75c (M) 6:00 AM ‐ 7:00 PM


All Weekend


AHU 2‐1 (M ‐ F) 6:00 AM ‐ 7:00 PM FVV2‐19 2826B 2826C Waiting/Interview Room Offices 70h ‐ 75c (M) 6:00 AM ‐ 7:00 PM


All Weekend


Initial ResultsInitial Results

General Services Complex 1800Chilled Water Consumption (mBtu)

Initial ResultsInitial Results

Chemistry Building Addition 376Chilled Water Consumption (mBtu)

ESCOESCO

LightingLighting

PC / ServersPC / Servers

Fume HoodsFume Hoods

Building Systems RepairsBuilding Systems Repairs

Energy Opportunity Assessment ProgramEnergy Opportunity Assessment Program

Best Practice Reference Bldg Bldg Section # Type Observation Recommendation Priority Impl. Start Date

Impl. End Date Status UES Notes Work Order

Number ESL Notes

AHU Occ./Unnoc. Mode Control MPB ‐ 1 Operations All of the units operate 24/7 Implement unoccupied schedules and/or setbacks for non‐lab areas 1 27‐Feb In‐Progress

Implemented UNOCC/OCC AHU's 1,2,3,8,9,10,11 OAHU 1 BAS currently implementing a more comprehensive schedule. (Aug 21)

The set back also needs to be implemented to these units. (July 18) AHU 1 and OAHU 1 were not shut down from 0 am to 6 am (based on units' supply fan trending data from Aug.20 to Aug.24).

CHW Differential Pressure Control MPB ‐ 2 Optimization CHW and HHW pump VFDs operate based on a constant loop differential pressure setpoint

Implement a dynamic setpoint reset for differential pressure setpoints 1 27‐Jun 27‐Jun Complete Implemented

The CHW loop DP set point reset is based on the max. position of cooling coil valves of AHUs and FCUs. It is observed: except of AHU‐5 (100 %), the cooling coil valves' position in other AHUs is less than 50 %. The investigation is recommended to be conducted for AHU‐5. (July 18)

AHU Supply Air Temperature Control MPB ‐ 3 Optimization Areas served by the UFAD suffer from comfort issues in

the form of, mostly, overcoolingRaise the cold deck temperatures as per the UFAD system design and reset based on cooling load indicators 1

Zone Occ./Unnoc. Mode Control MPB ‐ 4 OptimizationTerminal boxes have occupied/ unoccupied cooling and heating setpoints but occupied/unoccupied mode switch is not implemented

Enable Occ/Unocc. Modes 2 In‐ProgressWaiting on schedule from ESP BAS currently implementing a more comprehensive schedule. (Aug 21)

AHU Relative Humidity Control MPB ‐ 5 DeficiencySeveral AHU’s have a humidity override control for OA intake using a humidity sensor installed in the downstream of the cooling coil

Move RH Sensor to RA stream. Further optimize sequence of operation and setpoints as appropriate. 1 1‐Apr In‐Progress Moved all associated RA sensors as

described. The control sequence needs to be optimized. (Aug 10)

Zone Minimum Flow Control MPB ‐ 6 OptimizationVAV terminal boxes, mostly serve electrical rooms and tele/data rooms, have the minimum air flow ratio of 30% or more

Optimize min flow settings while maintaining building pressurization. 1 26‐Jun 26‐Jun Complete Reduced flows to ELECT/TELE DATA rooms

(1) 17 boxes are missed from the list to reduce minimum flow rate. (2) The reduced minimum flow rate value dosen't match ASHRAE Standard 62.1 requirement, low space temperature was observed: 67.5 oF in ELE Room 163, 71.2 oF in Tele Room 161, 65.7 oF in Tele Room 532, etc.

AHU Operating Mode Transition Control MPB ‐ 7 Optimization The OAT dead band for winter and summer mode switch

is 50°F to 52°F and does not consider space conditionsOptimize the sequence of operation based on building heating & cooling needs and leverage OA conditions 1

Zone Day‐Lighting Control MPB ‐ 8 DeficiencyThe photocell and the dimmable lighting switch are available in each perimeter room, but do not appear to be operating properly

Determine cause and correct 2 26‐Jun 6‐Aug Complete

Please provide specific room numbers where this is occuring. Checked a couple of sensors and they worked properly.

All the exterior rooms in both Institute Building and Department Building. (July 18)

Lighting Retrofit MPB ‐ 9 Retrofit Building entrance area has sufficient day‐lighting to keep entrance lighting off on sunny days

Install photocell control to override lights off when sufficient day light is present 3 Place on future ECRM funding list.

Building Use AdjustmentsBuilding Use Adjustments

Building Use AdjustmentsBuilding Use Adjustments

Francis Hall 476

mBtu

Holiday Break AdjustmentsHoliday Break Adjustments

Proactive Campus InvolvementProactive Campus Involvement

EventsEvents

ReportingReporting

TC:EC:OC:EUI:

Technology coefficient: Efficiency coefficient:

Opportunity coefficient:

Building:Richardson Petroleum Engineering Building

Building Number: 387Energy Steward: KeithSquare Footage 113,700Baseline EUI: 346EUI Goal: 277Current EUI: 200% Reduction: 42.2%

Technology Points Efficiency PointsDDC to all pumps Occ/unocc scheduleDDC to all AHUs AHU scheduleDDC to all exhaust Aggressive AHU scheduleDDC to room level Pump scheduleOccupancy sensors to lighting VAV boxes go to 0 CFM during non‐occupancyOccupancy sensors to TECs 75% of fume hoods closed during inspectionDDC control lab ACH 90% of fume hoods closed during inspection

Occupancy sensors controlling lightingOccupancy sensor controlling HVACOccupancy sensor controlling lab ACHProgram for occupants to turn off lighting

Opportunity Points All computer labs on hibernate programSchedule office HVAC All office computers on hibernate programSchedule lab HVAC Servers do not affect AHU scheduleFume hood sash closureControl lab ACHDesktop computers sleep mode

Occ sensors tied to TECs

Computer labs sleep modeServers causing HVAC issuesLighting opportunities

190

210

230

250

270

290

310

330

350

AnnualEUI

(mBtu)

Updated July 1, 2012

ReportingReportingTechnology coefficient: Efficiency coefficient:Technology Points Efficiency PointsDDC to all pumps Occ/unocc scheduleDDC to all AHUs AHU scheduleDDC to all exhaust Aggressive AHU scheduleDDC to room level Pump scheduleOccupancy sensors to lighting VAV boxes go to 0 CFM during non‐occupancyOccupancy sensors to TECs 75% of fume hoods closed during inspectionDDC control lab ACH 90% of fume hoods closed during inspection

Occupancy sensors controlling lightingOccupancy sensor controlling HVACOccupancy sensor controlling lab ACH

Opportunity coefficient: Program for occupants to turn off lightingOpportunity Points All computer labs on hibernate programSchedule office HVAC All office computers on hibernate programSchedule lab HVAC Servers do not affect AHU scheduleFume hood sash closureControl lab ACHDesktop computers sleep modeComputer labs sleep modeServers causing HVAC issuesLighting opportunitiesOcc sensors tied to TECs

Energy Stewardship Energy Stewardship

Strategy Annual Cost Avoidance

31 HVAC Schedules $453,773

1,365 PCs in Power Management 49,313

Building Repairs 142,584

Building Use Adjustments 40,034

Holiday Break Adjustments 423,627

TOTAL $1,109,331


Discussion

https://utilities.tamu.edu


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