2013 ENERGY REPORT MARK J. FERGUSON, P.E. CAMPUS ENERGY MANAGER 1125 GLEN AVENUE COLORADO SPRINGS, CO 80905

Transcription

1 2013 ENERGY REPORT MARK J. FERGUSON, P.E. CAMPUS ENERGY MANAGER 1125 GLEN AVENUE COLORADO SPRINGS, CO 80905

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3 CC 2013 Energy Report Table of Contents Executive Summary... 2 Utilities Overview... 3 Avoided Cost... 4 Our Carbon Footprint... 5 Benchmarking... 6 Benchmarking Educational Facilities... 8 Benchmarking Residential Facilities... 9 Benchmarking Support Facilities Utility Rates Campus Energy Manager Carbon Neutrality Action Plan Increased Renewable Purchases SoFame Heat Recovery

4 CC 2013 Energy Report Executive Summary The Facilities Services Department at Colorado College is committed to taking action to meet the College s 2020 carbon neutrality goal. Utilities management at Colorado College (CC) has become an area of increased emphasis. In FY 13 we experienced continued success in decreasing energy use and costs campus wide. Cumulative avoided costs for utilities are estimated in excess of $2.1M since the 2008 baseline. Some notable accomplishments for 2013 were: Campus Energy Manager Hiring In November of 2012 CC hired its first campus energy manager. Mark Ferguson was selected for the position within the facilities services department. Mark is a professional engineer with remarkable accomplishments in energy management. Carbon Neutrality Plan Development This year a plan was developed for achieving carbon neutrality. The development involved Facilities services, the office of sustainability, and the sustainability council. In May of 2013 the plan was briefed with the College s Board of Trustees. Increased renewable energy purchases In 2013, we purchased 3.2% of our total energy from renewable sources or 10.9% of our electricity. The bulk of our renewables was provided by wind purchased from Colorado Springs Utilities. We also purchased 230 kw in SunShare s second solar garden. Sofame Heat Recovery at Central Plant The Sofame system recovers waste heat from flue gases leaving the Central Heating Plant and uses the recovered heat in the El Pomar Sports Center. The system provides free heating to the El Pomar Sports Center and reduces Central Plant emissions. 2

5 CC 2013 Energy Report Utilities Overview For the 2013 academic year, Colorado College s main campus energy related characteristics were: o o o Approximately 2,064,590 square feet (SF) of space Approximately 95 acres of land 152 Buildings For the 2013 academic year, Colorado College s main campus energy performance statistics were: o o o Energy use averaged 83.3 kbtu per square foot (SF) lowest since the 2008 baseline Energy costs averaged $0.90 per SF A 2.6% decrease over previous year MTCO 2 emissions averaged MTCO 2 e per SF 3

6 CC 2013 Energy Report Avoided Cost The cumulative campus utility cost avoidance compared to the campus baseline of 2008 is estimated at $2.1M. The avoided cost for the 2013 academic year is estimated at $570k. These numbers reflect combined utility savings, which account for avoided electricity, natural gas, water, and waste water costs. Below is a graphical representation of overall avoided utility costs. 4

7 CC 2013 Energy Report Our Carbon Footprint Colorado College s commitment to become carbon neutral stems from the College s signing of the Presidents Climate Commitment in The College s carbon footprint is estimated at 29,179 metric tons of CO 2 (MTCO 2 ) for the 2008 baseline. Since 2008 Colorado College has been progressing towards its carbon neutrality goal. For 2012 the College s carbon emissions are estimated at 21,638 MTCO 2 for a reduction of 26%. These measurements include emissions as listed below: 5

8 Benchmarking Colorado College has been tracking overall campus energy and cost intensity since For reference the Association of Physical Plant Administrators (APPA), who represents the largest international association of educational institutions and their facilities departments, list the 2012 average energy intensity at 121 kbtu/sf/yr. APPA lists the average cost per square foot at $2.25 / SF. The chart below shows CC is well below both figures with an intensity of 83 kbtu/sf/yr and a cost of $0.90/SF. The chart also confirms a sustained decline in both energy cost and use. One factor that is unclear is what effect CC s block plan has on our overall energy use intensity. The block is thought to require more educational space because all spaces are used simultaneously. For comparison the following annual kbtu/sf/yr numbers were calculated using the most recent ASHEE STARS data: Carleton College No Data Colby College 146 kbtu / SF Colgate University 171 kbtu / SF Grinnell College No Data Middlebury College No Data Pomona College 134 kbtu / SF University of Denver 101 kbtu / SF University of Colorado Boulder 134 kbtu / SF Williams College 141 kbtu / SF 6

9 The chart above breaks down expenses by utility commodity. The most notable information is the increases in electricity and water costs despite reduced use. The charts below give more detail on these relationships. This is the first year for benchmarking at a building level. Two years ago thermal metering was installed enabling CC to measure the amount of heating and cooling energy flowing from the central plant. The following charts are the results of building level metering. Revision 0 7

10 Benchmarking Educational Facilities 8 September 2013

11 Benchmarking Residential Facilities 9

12 Benchmarking Support Facilities 10

13 Utility Rates CC has made significant improvements in reducing use since Despite these improvements our costs are relatively unchanged due to increase in utility rates. The charts below show the variation in commodity rates per unit experienced by CC since Electricity and water rate increases have seen larger than expected upward pressure. Natural gas costs have declined due market conditions and to moving to an interruptible rate. Revision 0 11

14 Campus Energy Manager In November of 2012 CC hired its first campus energy manager. Mark Ferguson was selected for the position within the facilities services department. Mark is a professional engineer with remarkable accomplishments in energy management. Mark holds a bachelor s degree in mechanical engineering, a master s degree in engineering management and a master s of business administration in finance. In addition to his extensive education, Mark holds the following certifications: Certified Energy Manager (CEM) Certified Energy Auditor (CEA) Certified Green Building Engineer (GBE) Certified Building Commissioning Professional (CBCP) Certified Energy Procurement Professional (CEP) Certified Measurement & Verification Professional (CMVP) Certified Renewable Energy Professional (REP) Mark comes from Colorado Springs School District 11, where he worked as their Energy Program Manager / Project Manager for the last 7 years. Mark managed utilities for 4.5M square feet of buildings space and 758 acres throughout Colorado Springs. Mark initially worked on D 11 s $150M bond program. One significant accomplishment of the bond program was the construction of 2 new elementary schools which operate in the 99 th percentile of school buildings for energy efficiency in the United States. The energy program Mark managed and developed was responsible for a 30% reduction in energy use and $15.1M in avoided energy costs. Mark earned the Districts Leadership Award for labeling 40 of 55 eligible buildings with the EPA s Energy Star. The average age of these buildings was 50 years old. Mark is very excited about renewable energy. He currently has 2 photovoltaic solar systems on his own home. In 2012 Mark designed and installed, using in house resources, ~420kW of photovoltaic solar throughout D 11. The project was so well planned and managed that it was able to achieve an estimated payback of 6 years. 12

15 CC 2013 Energy Report Carbon Neutrality Action Plan 2MW PV Array This project includes construction of a 2 MW AC solar facility in Colorado Springs before July The college would receive 3 times the renewable energy credits under Colorado s Renewable Portfolio Standards. A special contract with Colorado Springs Utilities would allow for distribution to Colorado College. 29,179 MTCO 2 Project Cost = $6.5M Carbon Reduction = 8,940 MTCO 2 Simple Payback = 11.5 Years 5% IRR & Utility Rate Escalation Carbon Offset Investment Project Cost = $6k $90k Annually Carbon Reduction = ~2747 MTCO 2 Combined Heat and Power This project would add power production to our existing heat production at the central plant. Combining the heat and power generation onsite provides the most efficient use of energy to Colorado College. This process would also switch our fuel source from coal to natural gas. The project would reduce carbon emissions from Colorado College s electricity by 80%. Carbon Neutrality Project Cost = $15.5M Carbon Reduction = 10,000 MTCO2 Simple Payback = 10.7 Years 5% IRR & Utility Rate Escalation 13

16 Increased Renewable Purchases This year CC increased its purchases of renewable energy. In total, we purchased 3.2% of our total energy from renewable sources or 10.9% of our electricity. The bulk of our renewables was provided by wind purchased from Colorado Springs Utilities. The College entered into a two year contract beginning September of 2012 for 1000 MWh s of wind per year. In April, we doubled our purchase to 2000 MWh s / year. All wind is applied to the College s Central Plant which serves most large buildings on campus with high temperature heating water and chilled water. Below is the renewable energy certificate provided by CSU for this purchase. The second major purchase of renewable energy occurred in November of CC purchased 230 kw of solar panels in SunShare s second solar garden project. As part of this purchase, the College receives all energy produced by the panels for the next 20 years and renewable energy certificates from SunShare each year. For the 2013 academic year these certificates totaled 462 MWh s. 14

17 CC 2013 Energy Report Sofame Heat Recovery In January of 2013 Facilities Services completed the Sofame Heat Recovery Project at the Williams Central Plant. The scope of the project was to recover waste heat from flue gases leaving the high temperature hot water generators and use the recovered heat in the El Pomar Sports Center. The system provides free heating to the El Pomar Sports Center and reduces Central Plant emissions. The Sofame Percotherm system is a direct contact primary heat exchanger system. It allows our central heating plant to achieve greater efficiencies by collecting the remaining sensible and latent heat from the plant s flue gas. Standard boiler efficiency is 80%. The maximum efficiency threshold for sensible heat recovery is 88%. By condensing the flue gas, latent heat recovery begins allowing for higher efficiencies. Condensing begins at ~135 F meaning the heating water leaving the system is ~135 F or less. A secondary closed loop flat plate heat exchanger is then used to move heat to the El Pomar Sport Center heating system. The building heating system is designed to heat using 135 F hot water and is supplemented by water from the high temperature hot water system. The recovered heat is also used to heat domestic hot water and the swimming pool. Below is a schematic from our building automation system which illustrates the systems operation. The cost of this system was $750k. During the first 6 months of operation, El Pomar Sports Center utilized 2,479 MBtu s of heat from the Sofame Heat Recovery System. The savings associated with this amount of heat is $17,515 with plant and distribution losses. The constraint to our savings is the amount of heat required by the building. The system is rated for ~1MBtu/hr. Construction of the addition at El Pomar Sport Center was completed in April giving us a larger heat sink. We anticipate the savings will be in excess of $50k for

18 2014 Sustainability Projects 2 MW Solar Project In July of 2013 the College s Board of Trustees approved funding for the construction of 2 megawatts (MW) of photovoltaic (PV) solar power. This 2 MW solar array will produce ~35% of the CC s electricity needs. Currently the College is working with Colorado Springs Utilities on the terms of an agreement to construct an array offsite and deliver its energy and REC s to campus. The project is expected to be complete by December of Spencer Center High Performance Building Design The Campus Energy Manager has been very involved in the design of the Spencer Center Renovation to insure the buildings energy performance aligns with CC s sustainability goals. Some highlights of the buildings high performance design are an R 27 envelope assembly, variable refrigerant flow water source heat pump system, LED lighting, and an interconnected PV system. For example, the LED lighting system will operate at 0.3W/SF while the minimum code requirement is 1.0 W/SF. Barnes Fume Hood Project This year Facilities Services is working on a project to update 27 year old fume hoods with air flow monitoring to insure proper airflow for differing sash positions. To improve energy performance in Barnes we are replacing the pneumatic controls on the supply air and room exhaust with direct digital controls (DDC). These new controls will allow us to apply more sophisticated logic to each lab and reduce air changes during unoccupied times. The system will also allow us to operate the room exhaust and fume hood exhaust as a coordinated system to insure proper lab ventilation. Campus Combined Heat and Power Feasibility Study In anticipation of Phase 3 of the Carbon Neutrality Action Plan recommendations, Facilities Services is determining the best alternative for integrating a combined heat and power system on campus. Facilities Services is enlisting professional engineering services to provide a feasibility study for the campus. The study will provide a comparison of all applicable CHP options and then provide schematic design for the selected option. This study will develop the project scope and provide a more detailed cost estimate. Worner Solar Thermal The Worner Solar Thermal Project is the first application of solar thermal hot water collectors on campus. The project is going to use solar hot water to preheat/heat domestic hot water serving Worner Center. Worner Center is a great location for this system due to its continuous hot water demand to support cooking operations. The system is intended to study the feasibility of meeting campus wide domestic water demands during the summer. Favorable system performance and operation could allow for shut down of high temperature hot water generation at the central plant during the summer. 16

19 CC 2013 Energy Report Net Zero Synergy House The Synergy house at 1018 N. Weber is the location of our first net zero building. The students who live in the Synergy houses are among the most committed to sustainability on campus. This project is designed to give students a prototype to study and discuss as we move closer to carbon neutrality. The project has already added electric water and space heating to the house. In addition a state of the art web based thermostat has been added allowing student to monitor and manage the house remotely. A PV system will be added in the spring. Packard Auditorium HVAC Controls Upgrade The HVAC system serving the Packard Auditorium utilized outdated pneumatic controls and operated 24/7. This project replaces those controls with new DDC controls. The new controls will enable us to schedule equipment operation for the space. One feature added to the new controls is demand control ventilation. The use of new sensors enables us to maintain excellent indoor air quality and save energy. Olin Power Factor Correction The electrical loads at Olin Hall require more current to achieve the same amount of useful work as other facilities. The result is an increase in the amount of energy lost in the distribution system. This project corrects the facilities power factor saving that energy. The payback is just over 3 years. Campus Housing Wireless Thermostats Wireless thermostats are the wave of the future. They allow people to monitor and control their homes remotely from their smartphones. This project is to install 10 wireless thermostats in houses on campus to get a feel for the technology. Approximately 3 different manufacturers will be used. The goal is to empower residents with the tools to better manage their energy consumption. Armstrong Auditorium CO 2 Sensor This project adds demand control ventilation to Armstrong s auditorium. Demand control ventilation uses CO2 sensors to measure the amount of CO2 in the space and modulate the outside air damper to maintain optimal air quality levels. It saved energy by reducing the amount of outside air the system is required to condition when air quality is good. 17