Monitoring-Based Commissioning Best Practices Award Welch Hall

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1 Monitoring-Based Commissioning Best Practices Award Welch Hall California State University, Dominguez Hills June 17th, 2014

2 Monitoring-Based Commissioning CSU Dominguez Hills Welch Hall

3 Content Project Overview Project Team Process & Implementation Major Findings Post-Implementation Baseline Energy Usage Energy and Cost Savings Future Improvements 3

4 Welch Hall Overview 1. Building constructed in Total area of 179,222 square feet and four stories 3. Heating and cooling provided by the campus central plant 4. Original air handling unit design caused high fan energy and comfort issues 5. 5 air handlers, 195 terminal units, 9 exhaust fans 4

5 Project Team On-site CSU Dominguez Hills Facilities Personal Management Kenneth Seeton MBCx Provider EnerNOC MBCx Implementation CSU Dominguez Hills EMCOR 5

6 The Process Meters installed and check for calibration Pre-baseline data collected and Option C Baseline Created EnerNOC verified what did and didn t work; findings added to a punchlist. Worked are way through a multi-page punch list Nearly all repairs were made by staff RMs and BSEs Brought Emcor in to install controller and do programing EnerNOC field verified all the repairs by opening, closing, and testing every point Post-energy data collected and savings calculated Training / educational wrap up meeting 6

7 Findings Log As A Punchlist CSU Dominguez Hills / Welch Hall Issue Identification Measure Action Status Item Number Equip. Name / Tag No. Issue Description Date Identified Identified by Whom (Initials) Phase Identified Recommended Action 1 AHU-1 No filter differential pressure gauge Consider installing Delta P gauge for 9/16/08 DCN Pre-Investigation found checking status of filters O&M Low CSUDH Identified 10/25/11 Closed Repaired 2 AHU-1 Return fan motor has excessive Inspect bearing (replace if 9/17/08 DCN Pre-Investigation noise when running at 50% speed necessary) and lubricate motor Repair Medium CSUDH Identified 10/25/11 Closed Repaired 3 AHU-1 Loose return fan/motor belts (look Apply proper tension to belts or 9/17/08 DCN Pre-Investigation flimsy during operation) replace if necessary Repair High CSUDH Identified 10/25/11 Closed Repaired 4 AHU-1 Return fan/motor vibration isolators Check vibration isolators and make do not seem to function properly 9/17/08 DCN Pre-Investigation adjustment as necessary (little movement) Repair Medium CSUDH Identified 10/25/11 Closed Repaired 5 AHU-2 No filter differential pressure gauge Consider installing Delta P gauge for 9/16/08 DCN Pre-Investigation found checking status of filters O&M Low CSUDH Identified 10/25/11 Closed Repaired 6 AHU-2 Supply fan/motor middle belt is Apply proper tension to belt or 9/17/08 DCN Pre-Investigation loose (slack observed) replace if necessary Repair High CSUDH Identified 10/25/11 Closed Repaired 7 AHU-2 No display on supply fan VFD's LCD screen 9/17/08 DCN Pre-Investigation Fix VFD's LCD screen Repair High CSUDH Identified 10/25/11 Closed Repaired 8 AHU-3 One section of filter fell off 9/16/08 DCN Pre-Investigation Reinstall filter O&M Low CSUDH Identified 10/25/11 Closed Repaired 9 AHU-3 CHW coils look dirty 9/16/08 DCN Pre-Investigation Clean CHW coils O&M Low CSUDH Identified 10/25/11 Closed Repaired 10 AHU-3 Loose supply fan/motor belts (belts can be seen wobbling up and down) 9/17/08 DCN Pre-Investigation Apply proper tension to belts or replace if necessary 11 AHU-3 Loose return fan/motor belts 9/17/08 DCN Pre-Investigation Apply proper tension to belts or replace if necessary 12 AHU-3 High pitch noise can be heard at Lubricate motor and Inspect bearing 9/17/08 DCN Pre-Investigation return fan motor during operation (replace if necessary) Return Fan immediately tripped when attempted to reduce speed 13 AHU-3 Cogent energy will investigate manually (VFD was running at 44 9/17/08 DCN Pre-Investigation further Hz before tripping); "overbraking" and code "06F" shown on display Schedule air handlers to run only 14 AHU-2&3 Air handlers run 24/7. 9/17/08 RG Pre-Investigation during normal building operating hours. 15 AHU-1 "Interface not communicating" message displayed on local Trane's controller Consult with Trane contractor and 9/30/08 DCN Pre-functional tests also check communication network Measure Type Priority Assigned to Whom Target Action Date Repair High CSUDH Identified 10/25/11 Closed Repaired Repair High CSUDH Identified 7/27/09 Closed Repaired Repair Medium CSUDH Identified 10/25/11 Closed Repaired Repair High Cogent Identified 10/25/11 Closed Repaired Programming High CSUDH Identified 10/25/11 Closed Repaired Repair Critical CSUDH Identified 10/25/11 Closed Repaired 16 AHU-2 CHW coils look dirty 9/30/08 DCN Pre-functional tests Clean CHW coils O&M Low CSUDH Identified 10/25/11 Closed Repaired 17 AHU-2 One loose actuator on CHW valve (motor backside); additionally, the valve stem does not move with changes in CHW valve command Reinstall actuator, motor and check 9/30/08 DCN Pre-functional tests control wiring and actuator's connection to the valve stem Repair High CSUDH Identified 10/25/11 Closed Repaired Current Status Current Status Date Open / Closed Notes 7

8 Results 25 % Reduction in Annual Spending $108,306 8

9 Pre-Investigation Baseline BTU 1,400,000,000 1,200,000,000 1,000,000, ,000, ,000, ,000, ,000,000 Monthly Energy Consumption for Welch Hall 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 200, , , , ,000 75,000 50,000 25,000 0 kwh Hot Water (Btu) Chilled Water (Btu) Electricity (kw) Energy Usage Category Annual Baseline Usage Electricity (kwh/yr) 2,376,793 Chilled water (MMBtu/yr) 12,217 Hot water (MMBtu/yr) 2,908 9

10 Pre and Post Baseline Comparison BTU 1,400,000,000 1,200,000,000 1,000,000, ,000, ,000, ,000, ,000,000 0 Monthly Energy Consumption for Welch Hall 250, , , ,000 50,000 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec kwh Post-Implementation Hot Water (Btu) Post-Implemenation Chilled Water (Btu) Post Implementation Electricity (kw) Pre-Implemenation Hot Water (Btu) Pre-Implementation Chilled Water (Btu) Pre-Implementation Electricity (kw) Annual Energy Usage Category Electricity (kwh/yr) Chilled water (MMBtu/yr) Hot water (MMBtu/yr) Pre-Baseline Usage Post-Baseline Usage Energy Savings Cost Savings Percent Savings 2,376,794 1,808, ,296 $70,014 24% 12,217 8,429 3,788 $27,508 31% 2,908 1,423 1,485 $10,784 51% 10

11 Energy Saving Measures Measure Number of Instances Found Calibrate temperature sensors 4 Clean chilled water coils 2 Repair or replace non-functional valves 1 Repair or replace damper linkage or actuator 6 Raise economizer lockout temperature 1 Move temperature sensor away from heat source 3 11

12 Future Improvements 1. Clean terminal unit reheat coils & re-tab the building 2. Install turning vanes to reduce fan system effects 3. Implement a static pressure reset on air handling unit controls 4. Implement dual-setpoint occupancy flow at the zones 12

13 Added Benefits of MBCx How did this MBCx project help the campus with implementation and savings realization across campus Everyone in my department became much more knowledgeable of the building Employees saw the benefits of having things work correctly Mechanics started to fix some of the same problems on other buildings or at least ask when we could get money to fix other things. Finishing an MBCx gives a moral boost to the department and momentum to discover other savings on campus for a while 13

14 Questions? 14

Xavier University of Louisiana

Xavier University of Louisiana Annual Savings Report Year 2 May 1, 2012 to April 30, 2013 July 2013 For Marion Bracy Vice President Xavier University Facilities Planning 1 Drexel Drive New Orleans LA 70125 (504) 520 1056 Submitted By