center for the arts towson university Architectural Engineering Lighting/Electrical Benjamin Mitten Spring 2005

Transcription

1 Architectural Engineering Lighting/Electrical

2 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth

3 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth

4 duction To The Building Location Center for the Arts Towson University 7815 Osler Drive Towson, MD Paint Studio Lobby Controls Mechanical Conclusion

5 General Information - Renovation of Existing Building - 122,000 sf addition onto the existing 166,000 sf building. - Total project budget of $42 million - Major Project Team -Owner: Towson University -Architects: Design Collective, Inc. Wilson Butler Lodge - Construction Manager: Gilbane - MEP: Mueller Associates, Inc. - Structural: Delon Hampton & Assoc. - Occupants of the Building - Dance Program - Art Program - Music Program - Theatre Program Paint Studio Lobby Controls Mechanical Conclusion

6 Building Layout Paint Studio Lobby Controls Mechanical Conclusion

7 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth

8 Paint Studio Location: 4 th Floor of the North-East Section of the building. Space Characteristics: Paint Studio - Approximately 2100 sf. - North wall consists of a glazed curtain wall - Exposed ceiling at a height of Floor Easels in the space Paint Studio Lobby Controls Mechanical Conclusion

9 Paint Studio Tasks - Painting- Objects, Figures, Human Figures, etc. - Pin- ups/ Presentations - Film Presentations Design Criteria - Provide light for correct color appearance and contrast - Lighting for facial modeling and objects - Distribution of light on easels - Illuminance of 50 fc horizontally and 30 fc vertically - Achieve a clear appearance - Power Density of 1.2 Watts/SF Paint Studio Lobby Controls Mechanical Conclusion

10 Paint Studio Solution 54 Watt Indirect Fluorescent Pendent Fixture with electrical track on underside 90 Watt Spot light on track Paint Studio Lobby Controls Mechanical Conclusion

11 Paint Studio Luminaire Type A B Power Density Calculation # of Luminaires 41 7 Input Watts/Fixture Square Feet of Room Power Density (W/sf) The power density is above the recommended ASHRAE/IES Standard 90.1 value of 1.2 Watts/ Square Foot. Redesigning would be necessary to reduce this in the space Total Watts Paint Studio Lobby Controls Mechanical Conclusion

12 Paint Studio Renderings Paint Studio Lobby Controls Mechanical Conclusion

13 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth Conclusion

14 Lobby Location: 3 rd Floor, center of the building Lobby Space Characteristics: - Approximately 4800 sf. - Cantilevered awnings over the entrances of four major spaces; Concert Hall, Main Stage Theatre, Recital Hall, Studio Theatre - Finished Stone Floor Paint Studio Lobby Controls Mechanical Conclusion

15 Lobby Tasks - Circulation space provides access to the Concert Hall, Recital Hall, Main Stage Theatre, and the Studio Theatre. It also services the corridors to areas such as the Fine Arts Box Office and Painting Galleries - Social Gathering - Reading Design Criteria - Most important space in the building - Provide a visibly pleasing atmosphere - Achieve a relaxed, spacious, and public appearance - Draw people towards areas of interest - Power Density of 1.6 Watts/ SF Paint Studio Lobby Controls Mechanical Conclusion

16 Lobby Solution 32 Watt Fluorescent Strip light for cove lighting 42 Watt Compact Fluorescent Downlight 18 Watt Compact Fluorescent Downlight Neon Light Tubes for accent Provide different scenes for different events Paint Studio Lobby Controls Mechanical Conclusion

17 Lobby Luminaire Type A B C D Power Density Calculation # of Luminaires Watts/Fixture Square Feet of Room Power Density (W/sf) The power density is below the recommended ASHRAE/IES Standard 90.1 value of 1.6 Watts/ Square Foot Total Watts Paint Studio Lobby Controls Mechanical Conclusion

18 Lobby Renderings Paint Studio Lobby Main Concert Studio Recital Stage Theatre Hall Scene Controls Mechanical Conclusion

19 Lobby Other scenes provided - Egress scene IES Illumination Recommendations Lobby 10 footcandles Illuminance values for scenes Egress scene- 9.9 fc OK All other scenes- all were around 28 fc OK Paint Studio Lobby Controls Mechanical Conclusion

20 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth Conclusion

21 Controls Most of the energy consumption in a commercial building comes from lighting. T ypical Energy Consumption In A Commercial Building 7% 16% 5% 4% 3% 3% 27% 35% Lighting S pac ing Co o ling S pac e Heating Refrigeratio n Other Offic e Equipment Water Heating Cooking Paint Studio Lobby Controls Mechanical Conclusion

22 Controls Analyze an advanced digital control system on the 3 rd floor of the building Assumptions made in-order to perform the analysis - System will examine the Linear Fluorescent Fixtures only - The system will cause a 10% reduction in lighting energy (expected to be more than assumed value) - Compact Fluorescent fixtures will be connected to the system at a later time ( CF ballasts are not compatible at this time) Paint Studio Lobby Controls Mechanical Conclusion

23 Controls Type of controls used in spaces 70% 60% 50% 40% 30% 20% 10% 0% - Photocells (Daylight Control) - Automated Occupant Control - Occupancy Sensors (Manual Dimming and Shut-off) - Single Standard Switch (with indicating light) Controls In Percentage of Total Rooms on 3rd Floor Daylight Harvesting Automated Occupant Contr ol Paint Studio Lobby Controls Manual Dimming No Control Single Switch Special Control Mechanical Conclusion

24 Controls Use of the system - Up to 64 Ballasts on a power supply - Each ballast is digitally programmed to respond/ speak speak to certain control sensors. Photocells, etc. - Reprogramming an entire floor is easy and does not need to be rewired. (Extremely practical for open office use where reconfiguration of the space may occur) - Each ballast in the power supply loop can respond to any sensor in the loop - Easily reprogrammable - Sensors simply plug into ballasts Connection from direct components Paint Studio Lobby Controls Mechanical Conclusion

25 Controls Control Loop Circuits - 27 control loops - exclusion of Lobby, Concert Hall, Recital Hall, Main Stage Theatre, and Main Studio Theatre. Paint Studio Lobby Controls Mechanical Conclusion

26 Controls Regular System Advance System 1 Lamp Ballasts Quantity Cost $99-2 Lamp Ballast Quantity Cost $99-3 Lamp Ballasts Quantity $175,200 The initial cost savings of the advanced system is approximately $29,000 Cost $139 - Occupancy Sensors Quantity 42 - Cost $120 - IR & Personal Control Quantity 91 - Cost $ Budget Cost - Total Cost $204,074 $175,200 Paint Studio Lobby Controls Mechanical Conclusion

27 Cost analysis for 10% energy reduction. Analysis is for the MOST EXTREME CASE with the lights on, 18 hours a day, 7 days a week, 52 weeks a year. Full Watt Output of the System 10% Reduction in Energy Consumption Total KW Used Cost Per Hour Cost savings per year is approximately $5, Cost savings will increase if the system is implemented throughout the entire building - Cost difference decreases as hours, days and weeks are reduced. $8.66 $7.79 Hours/Day Days/Week 7 7 Weeks/Year Cost Per Year $56,736 $51,062 Paint Studio Lobby Controls Mechanical Conclusion

28 Controls Major Advantages - easy ballast replacement and no reprogramming - easy installation and connection of sensors - sensors are easily added as needed - extreme savings in the initial cost as well as annual savings - gives control of individual spaces to users if desired which improves comfort and in-turn increases productiveness Paint Studio Lobby Controls Mechanical Conclusion

29 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth Conclusion

30 Mechanical Addition of a Heat Recovery Unit on a 100% OA existing air handling unit. The Enthalpy Wheel Efficiency for this analysis is assumed to be 80 % The indoor and outdoor air conditions for Baltimore Maryland are shown in the tables below. Temp ºF 93 ºF 75 Temp (Dry Bulb) Enthalpy btu/lb Indoor Air Conditions Outdoor Air Conditions for Baltimore MD. Temp (Wet Bulb) ºF 75 Humidity Ratio gr/lb Enthalpy btu/lb Density lb/ft^ Density lb/ft^ Paint Studio Lobby Controls Mechanical Conclusion

31 Mechanical The exhaust air for heat recovery is not constant air volume so a maximum and minimum amount of recoverable heat is determined off of cross s flow ratios. The Maximum cross flow was determined to be 48,000 cfm. The minimum cross flow was determined to be 15,500 cfm. Paint Studio Lobby Controls Mechanical Conclusion

32 Mechanical Paint Studio Lobby Controls Mechanical Conclusion

33 Mechanical The design for the new AHU will be designed for 15,500 cfm. The table below shows the Coil Load reduction and the reduction of energy. The reduction of the coil is approximately 16%. Supply Air Enthalpy btu/lb Coil Load (max) Tons Coil Analysis Coil Load (Min) Tons Coil Load (no recovery) Tons Paint Studio Lobby Controls Mechanical Conclusion

34 Presentation Outline duction To The Building Lighting Depth - Paint Studio - Lobby Controls Depth Mechanical Breadth Conclusion

35 Recommendations - The lighting design in the Paint Studio should be redesigned to meet the Power Density requirements - The lighting design in the lobby parallels the design criteria - The advanced control system should be implemented through out the whole building - An energy wheel should be added to the existing AHU to reduce coil size and save energy Paint Studio Lobby Controls Mechanical Conclusion

36 Acknowledgments AE Department and Faculty TA Engineering Alan Zemla Jim Moore Mueller Associates, Inc. Todd Garing and Ken Rock Towson University Dennis Bohlayer Lutron Electronic Company, Inc. Family and Friends Paint Studio Lobby Controls Mechanical Conclusion

37 Questions?