Xavier University of Louisiana
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1 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 (504) Submitted By Siemens Industry, Inc. Building Technologies Division 150 Teal Street Suite 100 St. Rose LA (504)
2 Executive Summary Siemens Industry, Inc. is pleased to submit the following Annual Savings Report for Xavier University of Louisiana (Xavier University). This report covers the second year of energy performance during the period from May 1, 2012 to April 30, Energy and cost savings are presented and compared to the contractual guaranteed savings. The facility improvement measures (FIMs) implemented with this project are listed in Table 1. Table 1 Facility Improvement Measures FIM DESCRIPTION Lighting Upgrades Upgrade of lighting in classrooms, corridors, and exterior locations of multiple facilities lighting fixtures with energy efficient lighting and devices. Chilled Water Optimization Chiller plant optimization to include variable frequency drives (VFDs), piping changes, and temperature/pressure sensors required to implement an advanced strategy to reduce electrical usage generated by the Central Chilled Water Plant. Energy Management and Implementation of scheduling and ventilation energy savings Control System (EMCS) strategies at multiple facilities. Mechanical Upgrades Implementation of mechanical upgrades at multiple facilities, including insulation, service valves, and air/water balancing. Water Management Upgrade of multiple facilities plumbing systems with more energy efficient water consuming devices. During this annual period, Xavier University realized total energy reductions in the amount of 10,001,493 kwh of electric energy, 48,169 ccf of natural gas, and 4,347 kgal of water. The total energy savings equate to a dollar savings in the amount of $1,020,566, 173 percent of the guaranteed cost savings of $588,371 $432,195 in excess savings. Table 2 shows kwh, ccf, and kgal annual reductions. Table 2 Annual Measured Savings FIM ELECTRIC ENERGY (kwh/yr) NATURAL GAS (ccf/yr) WATER (kgal/yr) TOTAL SAVINGS ($) Lighting Upgrades 2,216,109 $205,433 Chilled Water Optimization 6,180,956 $572,975 EMCS 1,604,428 32,121 $188,432 Water Conservation 16,048 4,347 $53,726 Water Conservation (CT Sewer Credits) $0 Total Savings 10,001,493 48,169 4,347 $1,020,566 Savings Guarantee 5,401,365 50,485 4,870 $588,371 Excess Savings / (Shortfall) 4,600,128 (2,316) (523) $432,195 Percent of Savings Achieved 173% Page 1 of 18
3 The utility costs used for savings calculations are based on agreed upon utility rates from the contract and the annual rate escalation of three percent. Table 3 shows the annual utility rates with escalation. Table 3 Utility Rates (Annual Rate Escalation of 3%) NATURAL ELECTRIC WATER SEWER YEAR GAS ($/kwh) ($/kgal) ($/kgal) ($/ccf) Baseline utility consumption by FIM is shown in Table 4. Total electric baseline consumption was 16,794,911 kwh, total natural gas baseline consumption was 89,561 ccf, and total water baseline consumption was 26,717 kgals for the year of January 2008 to December Additional buildings have been constructed on campus since baseline development in 2008, increasing electric, natural gas, and water consumption. Increased consumption from new buildings connected to the Central Chilled Water Plant, the Chapel and Qatar, has been mitigated by increased efficiency at the plant resulting from the chilled water optimization FIM. Table 4 Baseline Utility Consumption (January to December 2008) NATURAL ELECTRIC WATER FIM GAS (kwh) (kgal) (ccf) Lighting 3,523,989 Water 59,090 22,717 Water (CT Sewer Credits) 4,000 Chilled Water Optimization 10,775,383 EMCS 2,495,539 28,035 Piping Insulation 2,436 Total 16,794,911 89,561 26,717 Page 2 of 18
4 The contracted guaranteed savings for year 2 are detailed in Table 5. Table 5 Guaranteed Savings for Year 2 (from Contract) Annual Savings FIM FIM Title No. Electric Energy (kwh/yr) Natural Gas (ccf/yr) Water (kgal/yr) Total Savings ($) 1 Lighting Upgrades $113,862 2 Chilled Water Optimization $261,400 3 EMCS $142,090 4 Water Conservation $58,037 5 Water Conservation (CT Sewer Credits) $12,982 TOTAL 5,401,365 50,485 4,870 $588,371 The total project savings summary, Table 6, shows the annual and accumulated measured, guaranteed, and excess or shortfall savings totals. Table 6 Total Project Savings Summary YEAR Construction Period MEASURED SAVINGS GUARANTEED SAVINGS EXCESS SAVINGS/ (SHORTFALL) TOTAL ACCUMULATED PROJECT MEASURED SAVINGS TOTAL ACCUMULATED PROJECT GUARANTEED SAVINGS TOTAL ACCUMULATED PROJECT EXCESS SAVINGS/ (SHORTFALL) $215,277 $125,000 $90,277 $0 $0 $0 1 $786,871 $571,234 $215,637 $1,002,148 $696,234 $305,914 2 $1,020,566 $588,371 $432,195 $2,022,714 $1,284,605 $738, Page 3 of 18
5 Figure 1 shows job to date savings, including guaranteed and realized construction period savings, of $2,022,714 compared to the job to date guaranteed savings target of $1,284,605. $2,500,000 $2,000,000 $1,500,000 $1,000,000 $500,000 $0 $1,284,605 $2,022,714 Figure 1 Job to Date Savings Job to Date Guaranteed Savings Target Job to Date Savings Figure 2 shows the annual savings from each of the project years. The first annual period realized savings of $786,871. The second annual period achieved savings of $1,020,566. $1,200,000 $1,000,000 $800,000 $600,000 $400,000 $200,000 $0 $786,871 $1,020,566 Figure 2 Annual Savings Annual Period 1 Savings Annual Period 2 Savings These energy savings resulted in a significant reduction in green house gas emissions from power plants producing electricity in the New Orleans area. A reduction of 12,609,760 pounds of CO 2 was realized in the second year of this project. Page 4 of 18
6 The expected savings were exceeded through the implementation of lighting retrofits and air handling unit (AHU) time of day (TOD) scheduling, demand control ventilation (DCV), and Demand Flow chiller optimization controls and sequencing logic to allow the chiller plant equipment to slow down in times of reduced load and significantly reduce electricity consumption. Excess savings were also realized due to a significant increase in chilled water load at the plant. The additional load and savings associated with the chiller optimization FIM are detailed on page 7 of this report. Siemens believes that the best program to cost effectively achieve energy reductions by today s standards has been executed. Our service personnel continue to work closely with University staff and the Siemens PA group to improve and enhance performance. It is anticipated that with continued vigilance the projected energy savings will be met. Siemens remains a committed partner with Xavier University and looks forward to continuing a valued relationship on future energy savings projects. Sincerely, The Gulf Coast Performance Assurance Team Page 5 of 18
7 Annual Equipment Inspection/Installed Facility Improvement Measures (FIMs) The annual equipment inspection took place during recent site visits to Xavier University on July 2, 2013 and July 9, Siemens Performance Assurance and Service personnel met to discuss plant performance and operation and to view lighting and mechanical upgrades and water conservation measures in the Library and Xavier South. Lighting This FIM involved retrofitting existing, inefficient lighting systems in several buildings located throughout Xavier University with new energy efficient lighting equipment. Occupancy sensors were also installed to automatically turn lights off during unoccupied times. Figures 3 and 4 show lighting upgrades at Xavier South. Fixtures were retrofitted with four 30 watt T8 fluorescent lamps, the retrofitted equipment was operational. Figure 3 Lighting Retrofit Figure 4 Lighting Retrofit Page 6 of 18
8 Figure 5 shows a new LED exit sign with battery backup installed at Xavier South. Figure 5 Exit Sign Chilled Water Optimization This FIM involved optimizing the existing 2,400 ton capacity central chilled water plant that serves over fourteen (14) buildings on campus. Chilled water optimization included advanced energy management and control system strategies to enhance comfort and optimize energy efficiency. The optimization required physical upgrades, repairs, and additional mechanical installations that included the following: New VFDs on all chilled water pumps New fill on the Central Plant cooling tower New piping and valves in select buildings New chilled water temperature and flow sensors at multiple buildings New 2 way chilled water control valves on AHUs Cleaning of coils on select AHUs New Premium Efficiency Tertiary Pump Motors New VFDs on Building AHU Fans The following FIMs result in reduced cooling loads at the chiller plant: Lighting retrofits EMCS / TOD scheduling and DCV Piping Insulation The savings for this FIM are realized at the chilled water plant and are claimed with the chilled water optimization savings. The new Chiller No. 2 was the only operating chiller for this reporting period. The existing Chiller No. 1 was recently repaired and brought back online. Since the addition of Chiller No. 1, the plant is typically operating both chillers each with one compressor. Preliminary indications are that this configuration is producing greater efficiencies than the operation of one chiller with both stages. Page 7 of 18
9 Table 7 shows the chiller optimization performance analysis for year 2. The annual kw/ton efficiency for this reporting period is 0.689, an improvement over year 1 annual plant efficiency of kw/ton. Improved efficiency may be due in part to overall cooler temperatures during the year 2 reporting period from the year 1 reporting period. Cooling degree days were 3,627 in year 1 and 3,117 in year 2. However, the load has increased from year 1 to year 2. The year 1 chilled water ton hours total was 9,956,164 and year 2 was 12,061,497 ton hours. The calculated savings increased with additional load. Two new buildings have been connected to the chilled water plant since baseline development, which have substantially increased the chilled water load at the plant. The new Chapel was dedicated in October 2012 and Qatar was brought online prior to the year 1 reporting period; however, the building was not fully occupied. During this reporting period, animals have been moved to Qatar requiring 24/7 operation for a portion of the building. The improved efficiency this year mitigated the increase in ton hours from year 1 to year 2. The chiller optimization savings calculations are determined by the monthly total chilled water ton hours and the difference between the baseline efficiency in kw/ton and the post retrofit efficiency in kw/ton. Energy graphs for the Central Chilled Water Plant are included in the Appendix. Table 7 Demand Flow Chiller Optimization Performance Analysis SUMMARY PERFORMANCE ANALYSIS PRE RETROFIT BASELINE POST RETROFIT MONTHLY SAVINGS ACCUMULATED ANNUAL SAVINGS *** measured *** Month Chw Electric Efficiency Chw Electric Efficiency Electric Baseline Rate Baseline Rate Cost Savings Annual Total Baseline Rate Annual Cost Savings Achieved Guarantee YEAR 2 TonHrs kwh kw/ton TonHrs kwh kw/ton kwh $/kwh $ kwh $ % kwh May , , ,283, , ,034 $ $ 83, ,034 $ 83,613 40% Jun ,694 1,106, ,328,670 1,062, ,690 $ $ 51,542 1,501,724 $ 135,155 65% Jul ,442 1,144, ,681,856 1,244, ,524 $ $ 72,047 2,302,248 $ 207, % Aug ,442 1,144, ,649,101 1,305, ,883 $ $ 62,989 3,002,131 $ 270, % Sep ,694 1,106, ,589,371 1,121, ,952 $ $ 75,146 3,837,083 $ 345, % Oct 12 1,076,320 1,109, ,098, , ,086 $ $ 40,148 4,283,168 $ 385, % Nov , , , , ,789 $ $ 24,371 4,553,958 $ 409, % Dec , , , , ,436 $ $ 23,979 4,820,394 $ 433, % Jan , , , , ,589 $ $ 22,823 5,073,983 $ 456, % Feb , , , , ,331 $ $ 22,980 5,329,315 $ 479, % Mar , , , , ,484 $ $ 21,194 5,564,798 $ 500, % Apr , , , , ,157 $ $ 55,454 6,180,956 $ 556, % Totals 8,607,076 10,203, ,061,497 8,315, ,180,956 $ $ 556,286 6,180,956 $ 556, % Page 8 of 18
10 Table 8 shows weather conditions for the year 2 reporting period obtained from the National Weather Service, MSY Airport. Table 8 Weather Conditions May 2012 to April 2013 Weather Conditions Weather data for the New Orleans area is from the National Weather Service, MSY Airport. A summary of collected temperature data is listed below. Month May 2012 Jun 2012 Jul 2012 Aug 2012 Sep 2012 Oct 2012 Nov 2012 Dec 2012 Jan 2013 Feb 2013 Mar 2013 Apr 2013 Cooling Degree Days (65F) Heating Degree Days (65F) Avg Temperature (F) Avg Daily Max Temp (F) Avg Daily Min Temp (F) Maximum Temperature (F) Minimum Temperature (F) Average Daily Temperatures (F) Page 9 of 18
11 Figures 6 and 7 show VFDs for chilled water pumps 2 and 4. Figure 6 CHWP 2 VFD Figure 7 CHP 4 VFD Figure 8 shows chilled water pump 4 with motor. Figure 8 CHP 4 Pump and Motor Page 10 of 18
12 Figure 9 shows VFDs for condenser water pumps 3 and 4. Figure 9 CWP 3 and 4 VFDs EMCS Time of Day Scheduling and Demand Control Ventilation This FIM involved installing and/or enhancing the Apogee Energy Management and Control System in various buildings to perform a TOD scheduling function and for implementation of DCV of the Heating, Ventilating and Air Conditioning (HVAC) equipment. This FIM also included the installation of equipment necessary to provide advanced energy management and control system strategies for the Chilled Water Plant. The following list includes some of the additional equipment installed: Computer workstation and printer Control panel firmware and/or software upgrades Air flow measuring stations Outside air dampers Outside air damper electronic actuators Room CO 2 sensors Room temperature sensors Insertion probe temperature sensors for mixed air Insertion probe relative humidity sensors Unit equipment controllers or terminal equipment controllers Outside air temperature sensors Outside air dewpoint temperature sensor Room relative humidity sensors Page 11 of 18
13 Figure 9 shows the Apogee panels in the Central Plant. Figure 9 Apogee Panels Figure 10 shows a retrofitted control panel upgrade on the first floor of the Library. Figure 11 shows CO 2 and humidity sensors on the first floor of the Library. Figure 10 Retrofitted Control Panel Figure 11 CO 2 and Humidity Sensors Page 12 of 18
14 Figure 12 shows a damper actuator on the first floor of the Library. Figure 13 shows an air flow measuring station on the first floor of the Library. Figure 12 Damper Actuator Figure 13 Air Flow Measuring Station Figure 14 shows chilled water temperature sensors on the first floor of the Library. Figure 14 Chilled Water Temperature Sensors Page 13 of 18
15 Figure 15 shows an upgraded control panel on the 5 th floor of the Library Figure 15 Upgraded Control Panel Figure 16 shows an airflow measuring station on the fifth floor of the Library. Figure 17 shows a damper actuator on the fifth floor of the Library. Figure 16 Air Flow Measuring Station Figure 17 Damper Actuator Page 14 of 18
16 Figure 18 shows a control panel upgrade at the Xavier South Plant. Water Conservation Figure 18 Upgraded Control Panel This FIM involved the installation of low flow devises to reduce potable water consumption in various buildings. Figure 19 shows a urinal with a 0.5 gallons per flush (GPF) flush valve in the Library and Figure 20 shows a toilet with a 1.6 GPF flush valve in the Library. Figure GPF Flush Valve Figure GPF Flush Valve Page 15 of 18
17 Figure 21 shows the installation of a 0.5 gallons per minute (GPM) aerator on a faucet at Xavier South. Figure GPM Aerator Figure 22 shows the installation of a 1.6 GPF flush valve at Xavier South. Figure GPF Flush Valve Page 16 of 18
18 Water Conservation (Metered Cooling Tower Sewerage Savings) A flow meter was installed on the make up water line to the chilled water plant cooling tower. Most of the water consumed at the cooling tower is evaporated and does not reach the sewer system. The monthly consumption measured at the cooling tower flow meter should be recorded and reported to the Sewerage and Water Board so that a credit can be issued to the sewerage account. Currently, the water consumed at the cooling tower is not being reported to the Sewerage and Water Board, so no sewerage credits are being realized by Xavier University. Siemens is not reporting any cooling tower sewerage credits for this year, however, we reserve the right to initiate a baseline adjustment and claim these sewerage credits in future years. Page 17 of 18
19 Sustainability and Environmental Stewardship In addition to energy savings, this project resulted in a significant reduction in green house gases into the atmosphere from power plants producing electricity in the New Orleans area. A reduction in over 12,600,000 pounds of CO 2 was realized in the second year of this project and a reduction in over 21 million pounds of CO 2 has been realized over the two year term. Page 18 of 18
20 Annual Savings Report APPENDIX APPENDIX CHILLED WATER PLANT ENERGY GRAPHS Daily Chilled Water Usage Total Daily Chilled Water Usage [tonhrs] Average Daily Temperature [ F] Yea 2500 Avg Daily Chiller System Electric 2000 Average Daily Power [kw] Average Daily Temperature [ F] Year 2 Page 1 of 5
21 Annual Savings Report APPENDIX 1800 Chillers Electric Average Daily Power [kw] Average Daily Temperature [ F] Year Chilled Water Pumps Electric 250 Average Daily Power [kw] Average Daily Temperature [ F] Year 2 Page 2 of 5
22 Annual Savings Report APPENDIX 140 Condenser Pumps Electric 120 Average Daily Power [kw] Average Daily Temperature [ F] Year Cooling Towers Electric 200 Average Daily Power [kw] Average Daily Temperature [ F] Year 2 Page 3 of 5
23 Annual Savings Report APPENDIX 400 Total Condenser System Electric (Condenser Pumps & Cooling Tower) 350 Average Daily Power [kw] Average Daily Temperature [ F] Year Overall Chiller System Efficiency System Efficiency [kw/ton] ,000 1,500 2,000 2,500 3,000 Chilled Water Load [tons] Year 2 Page 4 of 5
24 Annual Savings Report APPENDIX Chiller System Component Efficiencies [kw/ton] Chiller System Efficiency Year Average Daily Temperature [ F] Overall System Chillers Pri & Sec Chw Pumps Cndsr Pumps Cooling Towers Chiller System Component Efficiencies [kw/ton] Chiller System Efficiency Year Average Daily Temperature [ F] Pri & Sec Chw Pumps Cndsr Pumps Cooling Towers Page 5 of 5
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