Adam Brown - Final Presentation
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CENTRAL HIGH SCHOOL Central High School Introduction Existing Mechanical System Thesis Proposal MID-ATLANTIC REGION Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth ADAM BROWN Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 MECHANICAL OPTION SPRING 2014 • Central High School • 1st floor renovation • 2nd floor addition Central High School Introduction Existing Mechanical System • Location - Mid Atlantic Region Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings • Size - 322,000 sq. ft. Acoustical Breadth • Project Cost - $84 million Construction Breadth • Completion - February 2015 Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Heating Water System • 1 natural gas boiler Central High School Introduction • Chilled Water System • 2 air cooled chillers Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings • Air Handling Units • 20 DOAS units • Energy recovery wheels Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • 4 pipe fan coil units Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Peak Heating Load – 7766 Mbh • Peak Cooling Load – 934 Tons Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Peak Electric Demand – 88681 kWh • Peak Gas Demand – 2094 Therms • Goals • REDUCE energy demand • REDUCE environmental impact • INCREASE maintainability Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Proposal • Ground Coupled Heat Pump System • Heat Pumps • Packaged ERUs • Hydronic Pumps Central High School • Vertical Bore Layout Introduction • Well Field • Increase depth of well • Decrease amount of wells Existing Mechanical System Thesis Proposal • Oversize Well Field • 1000 Tons • Soccer Field • Future capacity • No supplemental boiler / cooling tower Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Cooling Load [Tons] Well Capacity [ft/Ton] 934 200 Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 Depth of Well [ft] 400 Number of Wells 500 Well Coverage [ft^2] 314 Number of Wells 500 Total Coverage [ft^2] Soccer Field Area [ft^2] 157080 202213 Central High School • Well Field Layout • 38 rows • 13 wells per row • Reverse return Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Individual runs • Emergency shutoff Central High School Introduction • 3 VFD pumps • 2 primary pumps • 1 redundant Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings • Increase maintainability Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 Central High School Introduction Pump Selection Manufacturer Bell & Gossett Model Series 1510 Flow Rate [gpm] 1000 Head [ft] 200 Impeller Diameter [in] 8 RPM 3550 HP 60 Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Heat Pump Selection • Carrier • Typical 1 – 3 ton units • Energy Recovery Unit Selection • SEMCO • Packaged • Water to water source heat pumps • Enthalpy & Sensible wheels Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Electricity increase 45% Central High School Introduction • Energy decrease 35% Existing Mechanical System • Savings of $19074 per year Thesis Proposal Acoustical Breadth Construction Breadth Electricity Gas Total Conclusion MECHANICAL OPTION Electricity [kWh] Gas [kBtu] Building [Btu/ft^2-yr] Source [Btu/ft^2-yr] 768528 3221945 18263 35187 Floor Area [ft^2] Mechanical Breadth • GCHP Sizing / Layout • Energy Savings ADAM BROWN Site & Source Energy Baseline SPRING 2014 Energy Savings Baseline GCHP Energy [10^6 Btu/yr] Cost/yr [$/yr] Energy [10^6 Btu/yr] Cost/yr [$/yr] 2623 85793 3771 70516 3221.9 3797 0 0 5845 89590 3771 70516 1104826 0 11782 35350 320000 Building Emissions Baseline CO2 [lbm/yr] SO2 [gm/yr] NOX [gm/yr] GCHP 1028013 9257 1772 GCHP 1477859 13308 2547 Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 Central High School Introduction Existing Mechanical System Thesis Proposal NRC TL # Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 Description 1 single layer of 1/2 in gypsum board 1 single layer of 1/2 in gypsum board 3.5 in steel studs at 16 in o.c. TL-94-020 3.5 in glass fiber insulation resilient channels at 24 in o.c. 1 single layer of 1/2 in gypsum board 1 single layer of 1/2 in gypsum board STC 60 • Heat Pump closet • Typical for classrooms • Achieves mitigation of sound through wall • Meets ANSI S12.60 standard • NC 30 required • Low frequency issues Central High School Introduction Existing Mechanical System • Low Frequencies • Heat Pump emits most noise • Mitigate sound through ductwork Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings • NC 27 achieved Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 Central High School Introduction • Cost Difference of $3643.89 Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Closet Ceiling Acoustical Breadth Conclusion MECHANICAL OPTION Duration [days] 19 17 Coordination Issues 2 4 • Duration Difference of 2 days • Coordination Issues Difference of 2 Construction Breadth ADAM BROWN Cost [$] 63878.58 60234.69 SPRING 2014 • Goals • REDUCE energy demand • REDUCE environmental impact • INCREASE maintainability Central High School Introduction Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Construction Breadth Conclusion MECHANICAL OPTION • GCHP • REDUCED site energy • INCREASED environmental impact • INCREASED maintainability • Heat Pump Closet • MEETS ANSI standards • NOT feasible to construct Acoustical Breadth ADAM BROWN • Conclusions SPRING 2014 Central High School Acknowledgements Introduction Jacobs SHW Group Thesis Advisor AE Faculty Family & Friends Classmates Existing Mechanical System Thesis Proposal Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth THANK YOU! Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 References Central High School • SHW Group LLP “Final Bid Set”. Reston, Virginia. Introduction • Central High School “Master Specifications”. Existing Mechanical System • ASHRAE. Standard 62.1-2010, Ventilation for Acceptable Indoor Air Quality. Atlanta, GA. American Society of Heating Refrigeration and Air Conditioning Engineers, Inc. Thesis Proposal • ASHRAE. Standard 90.1-2010, Energy Standards for Buildings Except Low-Rise Residential Buildings. Atlanta, GA. American Society of Heating Refrigeration and Air Conditioning Engineers, Inc. Mechanical Breadth • GCHP Sizing / Layout • Energy Savings • ANSI/ASA S12.60-2010, American National Standard Acoustical Performance Criteria, Design Requirements, and Guidelines for Schools, Part 1: Permanent Schools. Melville, NY. Acoustical Society of America. Acoustical Breadth Construction Breadth • Halliwell, R.E., Nightingale, T. R. T., Warnock, A. C. C., Birta, J. A. Gypsum Board Walls: Transmission Loss Data. 1998. NRC-CNRC. Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014 • Mossman, Melville. Plumbing Cost Data, 2014. N.p.: Means, Incorporated, R. S, 2013. Print. • Mossman, Melville. Mechanical Cost Data, 2014. N.p.: Means, Incorporated, R. S, 2013. Print. • Phelan, Marilyn. Assemblies Cost Data, 2014. N.p.: Means, Incorporated, R. S, 2013. Print. • Faculty Consultations Central High School Introduction Existing Mechanical System Thesis Proposal Questions? Mechanical Breadth • GCHP Sizing / Layout • Energy Savings Acoustical Breadth Construction Breadth Conclusion ADAM BROWN MECHANICAL OPTION SPRING 2014
