The Florida State University Ringling Conservation Center Sarasota, Florida Linda Lewis Mechanical Option Spring 2005

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center General Information Located- Sarasota Florida on the Ringling Campus John Ringling – Sarasota is the Circus Capitol of the World Campus Museum of Art Cà d´zan Circus Museum Conservation Center Florida State University

Linda Lewis Mech OptionThe FSU Ringling Conservation Center General Information Size - 3 Stories 73,000 sq ft Building 23,000 sq ft Parking Garage/ Loading Deck Building Functions- Art Conservation- 2,020 Sq Ft Art Library- 17,050 Sq Ft Art Storage Sq Ft Classrooms Sq Ft Offices Sq Ft Unique Features- Lobbies, Corridors and Elevators – Fit large Pieces of artwork Art Conservation Lab– Self Balancing System Second Floor First Floor

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Consideration Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Project Team Owner: Sarasota County Architect: Hellmuth, Obata + Kassabaum, Inc. (HOK) – Tampa, Florida MEP & Technology: TLC Engineering for Architecture – Tampa, Florida Structural Engineer: Master Consulting Engineers – Tampa, Florida Construction Manager: To Be Determined– GC Hard Bid with GMP on Final CD’s

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Existing Conditions Mechanical 8 Air Handling Units (50,790 cfm) 3-Constant Volume – EDH and Humidifiers Serve Art Storage Areas 3-Variable Air Volume (VAV) – Electric Reheat Serve 2 nd Floor- Classroom, Office Area, Library 2-VAV Dual Path- Electric Reheat Dual Path- Separate Cooling Coils for RA and OA Serve 1 st Floor- Classrooms, Library Chiller Plant Provides Chilled Water for the Entire Campus

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Consideration Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Redesign Goals To Save Energy 71% of the US Electricity comes from Fossil Fuels Fossil Fuels Create Emissions Green House Effect DOE % of Electricity is used in HVAC Systems 80% of Electricity in the South is used by HVAC

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Redesign Goals Improve Indoor Air Quality (IAQ) The Environmental Protection Agency (EPA)- 90% of our time indoors Mild effects of poor IAQ are: irritation of the eyes, nose, and throat, headaches, dizziness, and/or fatigue Serious effects of poor IAQ: respiratory cancer, chronic obstructive pulmonary disease or immunologic disorders Asthma Numbers are Increasing Poor indoor air quality can result in a decrease in productivity of workers and larger numbers of absenteeism’s. Lower Operation Costs

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Design Considerations Outdoor Conditions Summer 93°F DB, 80°F WB Winter 39°F DB Indoor Conditions General Occupancy Areas Summer - 72°F DB, 50% RH Winter - 68°F DB, 55% RH Areas with Art work All Year - 70°F DB, 50% RH

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Design Considerations Proposal Energy Recovery Wheels Enthalpy Wheels Thermal Storage Partial Storage Load Leveling

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Background Information Can Reduce Outdoor Air Load on the Cooling Coil Help in better IAQ Remove containments from the air Allows for a more energy efficient way of bringing in appropriate ventilation air (ASHRAE Standard 62)

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Air Handling UnitsNovel Aire Wheels AHUSA cfmOA cfmEA cfm AHU AHU AHU AHU AHU AHU AHU 2-210, AHU

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Calculations Bin Year Occupied vs Unoccupied Summer vs School Year Novel Aire Simulation Program

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Wheel Operation On When Sum of Sensible and Latent Savings is Positive Off When Sum of Sensible and Latent Savings is Negative Modulate When Outdoor Air Temperature is Lower than Supply Air Temperature When Heating the Air the Air is also Humidified

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Summary of Results AHU Without EW kBtu With EW kBtu Savings Total kBtu% Savings AHU ,855157,95482,90134% AHU ,110317,167140,94331% AHU ,124533,994289,13135% AHU ,700133,07764,62233% AHU ,21988,25240,96632% AHU ,188435,785203,40432% AHU 2-21,208,102855,603352,49829% AHU ,28767,99541,29238% Total Outdoor Air Load Savings. Total Savings – 33% Of the Total Latent – 84% Sensible – 16%

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Wheels Savings AHU On Peak kWh per Year Off Peak kWh Per Year On Peak kWh Cost Off Peak kWh Cost AHU 1-15, $120.00$66.31 AHU 1-210, $254.32$ AHU 1-321, $517.38$ AHU 1-43, $72.07$39.83 AHU 1-53, $73.60$40.67 AHU 2-115, $365.42$ AHU 2-226, $634.03$ AHU 2-33, $73.01$40.34 Totals88,500157,334$2,110$1,166 Total Cost Savings WheelPrice Number of Wheels Installation CostTotal Cost ECW 204$ $420.00$1, ECW 244$ $420.00$3, ECW 364$1, $505.00$3, ECW 544$3, $630.00$4, ECW 724$6, $630.00$6, Totals$12,5008$2,605$18,405 Enthalpy Wheel First Cost First Cost Wheels Cost Savings: $3276

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Enthalpy Wheels Cost Analysis Wheels - $18,405 Reconfiguring AHU and Ductwork - $5000 Reduction in Cooling Coil Size - $7900 Conclusions Payback just using kWh Savings – 4.7 Yrs Less with On Peak kW Demand Reduction

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Thermal Storage Current Chiller Plant 2 – 650 Water Cooled Centrifugal Chillers Provide 40°F Water Ice Storage York Chillers Calmac Icetanks Melted Ice on Coil

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Partial Storage Florida Power and LightTime of Use Rates kW Demand Monthly Demand Charge On Peak kW Charge On Peak kWh Charge Off Peak kWh Charge $38.58$ ¢1.021¢ $38.12$ ¢0.788¢

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Partial Storage BASE LOAD CHILLER STORE

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Partial Storage Calculations Bin Year March Design Day 4500 Ton Hours Needed 500 Ton Ice Chiller for 9 Hours Savings Month Without Thermal Storage Thermal StorageDifference January February March April May June July August September October November December On-Peak kW Demand Category Without Thermal Storage Thermal Storage Total kWh2,383,2252,737,355 kWh On-Peak1,380,196358,030 kWh Off-Peak1,003,0292,379,325 % kWh On-Peak 57.9%13.1% % kWh Off-Peak 42.1%86.9% Summary of kwh Usage Month Electric Bill w/out Thermal Storage Electric Bill w/ Thermal StorageSavings January$5,882$3,291$2,591 February$6,199$3,126$3,073 March$5,913$3,460$2,453 April$7,806$3,845$3,961 May$7,694$4,252$3,441 June$8,331$4,132$4,199 July$8,624$4,422$4,202 August$8,513$4,254$4,259 September$8,308$4,162$4,146 October$8,149$4,194$3,955 November$6,477$3,598$2,879 December$6,186$3,311$2,875 Total Price$88,083$46,047$42,035 Totals Partial Storage Savings Average On Peak kW Shift – 428 kW 52% Reduction in Operation Cost

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Partial Storage First Cost – RS Means Equipment Thermal Storage Ice Chiller 500 tons$250,000 Base Load Chiller 180 ton$94,250 Redundant Chiller 500 Tons$169,600 Ice Storage Tanks (4560 Ton-hr)$456,000 Total$969,850 Thermal Storage First Cost Equipment Original System 650 Ton Chiller$215, Ton Chiller Redundant$215,000 Total$430,000 Original System First Cost Cost of Thermal Storage System = 125% Increase

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Partial Storage Cost Analysis First Cost Difference = $539,850 Inflation Rate of Money = 1.023% Annual Savings = $42,035 Payback Period = 12 Yrs

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Load Leveling STORE

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Load Leveling Calculations July Design Day 2650 Ton Hours Needed 310 Ton Ice Chiller Savings Month Electric Bill w/out Thermal Storage Electric Bill w/ Thermal StorageSavings January$5,821$5,262$559 February$6,619$6,012$607 March$5,707$5,185$522 April$7,529$5,985$1,544 May$8,005$6,426$1,578 June$8,111$6,632$1,479 July$8,199$6,864$1,335 August$8,115$6,412$1,703 September$7,960$6,302$1,658 October$7,854$6,287$1,567 November$6,450$5,889$561 December$6,317$5,693$624 Total Price$86,687$72,949$13,738 Totals Load Leveling Savings Month Without Thermal Storage Thermal StorageDifference January February March April May June July August September October November December On-Peak kW Demand Load Leveling Category Without Thermal Storage Thermal Storage Total kWh2,383,2252,629,290 kWh On-Peak1,380,196978,638 kWh Off-Peak1,003,0291,650,653 % kWh On-Peak 57.9%37.2% % kWh Off-Peak 42.1%62.8% Summary of kwh Usage Load Leveling 16% Reduction in Operation Cost Average On Peak kW Shift – 235 kW

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Load Leveling First Cost – RS Means Thermal Storage First Cost Equipment Original System 650 Ton Chiller$215, Ton Chiller Redundant$215,000 Total$430,000 Original System First Cost Cost of Thermal Storage System = 50% Increase EquipmentThermal Storage Ice Chiller 320 tons$160,000 Redundant Chiller 650 Tons$215,000 Ice Storage Tanks (2660 Ton-hr)$266,000 Total$641,000

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Mechanical Redesign- Load Leveling Cost Analysis First Cost Difference = $211,000 Inflation Rate of Money = 1.023% Annual Savings = $13,738 Payback Period = 15.5 Yrs

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Acoustical Analysis Reverberation Time FreqT60 Range 0.6 to Good Good High High High High Room Dimensions- 76’x 30’x 20’

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Acoustical Analysis Echo Eliminator Recycled Cotton - Green 2”- 2’x4’- (320ft 2 = 40 Panels) Freqα_Panel Panel AreaT Cost $1.75/ft 2 = $560 Shipping = $40

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Lighting Analysis Classroom Current Design 2’x 2’ two lamp, Parabolic Louvered, lay-in Fluorescent Fixtures Classroom Functions Teaching Creating Artwork New Design Direct/Indirect Fixtures Incandescent Downlights Lamps Daylight – 5000 K Incandescent – Natural Light Fluorescent – 4100 K (CRI = 85)

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Conclusions and Recommendations Add Enthalpy Wheels Payback Period 4.7 Years Decrease kW Demand Do Not Use Thermal Storage Both Partial Storage and Load Leveling have too high of Payback Periods Use More Smaller Chillers Add Acoustical Panels For a Low Cost Fix the Echo Change Lighting in the Classroom Areas Provide Better Lighting for Students to Learn

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Presentation Outline General Information Project Team Existing Design Redesign Goals Design Considerations Mechanical Redesign Acoustical Analysis Lighting Analysis Conclusion and Recommendations Acknowledgements Questions

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Acknowledgements Special Thanks To: Dr. Freihuat Dr. Mumma Dr. Bahnfleth Dr. Burroughs AE Faculty AE Staff Novel Aire – David McDonald Family Friends AE Class of 2005

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Questions? ? ? ? ? ? ?

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Desiccant Dehumidification System Leavi ng DB Leavi ng Gr/lb OA Sensible CC Load Btu OA Latent CC Load Btu Sensible OA Load with EW Btu Latent OA Load w/EW Btu Sensibl e OA Load Savings Btu Latent OA Load Savings Btu Total Savings Btu Enthalpy Wheel ,15387,86333,40230,73213,75154,46168,212 Active Desiccant ,15387,86380,44929,631-33,29758,23224,935 Overall Savings of Active Desiccant is 37% of the EW Savings

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Using Smaller Chillers Current Chiller Design 2 – 650 Ton Chillers Proposed to use 2 – 350 Ton Chillers 1 – 300 Ton Chiller Advantages Lessen Redundant Capacity Needed Increase Efficiency- Decreasing Energy Approximate Savings - $8,000 Electricity/Yr First Cost – 20% Reduction in Cost Still have the Ability to Add to Plant

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Existing Conditions Electrical 2000 amp, 480/277, 3 phase, 4 wire system 8 step down transformers– 208Y/120 Lighting Lobbies- Compact Fluorescent Downlights Classrooms- 2’x 2’—2 lamp parabolic louvered fluorescents Storage Areas- 4’—2 lamp industrial strip fixtures Conservation Lab-8’—2 lamp direct/indirect pendant fluorescents Structural 3 Story Concrete Structure Poured Concrete Columns Precast Sofit Beams Precast Concrete Joists – Ribs 5’ OC Floor– Pour Concrete Lateral System- Braced Steel Frame Roof– Standing Seam Metal Technology Telephone outlets- Offices & Classrooms Television – Classrooms Ethernet- Classrooms, Library, Offices, Conservation Lab

Linda Lewis Mech OptionThe FSU Ringling Conservation Center Design Considerations Building Operation Library: September-April Monday-Sunday7am – 9pm May-August Monday-Sunday7am – 6pm All other Areas: Monday-Sunday7am – 5pm