Presentation Outline I. Introduction A. Title ( Slide 1 ) 1. MBNA - - PDF document

Presentation Outline

• I. Introduction
• A. Title (Slide 1)
• 1. MBNA Career Services Center
• 2. The Pennsylvania State University, University Park Campus
• 3. Presentation by me
• 4. Mechanical Option
• B. Building Overview (Slide 2)
• 1. Office type building – Career Services
• 2. Approx. 44,000 sq. ft. – 4 floors
• 3. Total Cost: $9.5 million
• 4. Date Completed: July 2002
• C. Project Team (Slide 3) (show relationships in flow chart)
• 1. Owner: Penn State
• 2. Architect: Weber Murphy Fox
• 3. Engineer: H. F. Lenz, Co.
• 4. CM: Alexander Constructors
• 5. Primes
• a. M/P: Silvertip
• b. E: Ross Enterprises
• c. S: Amthor Steel
• II. Mechanical
• A. Existing System Overview (Slide 4)
• 1. VAV system
• 2. Three Air Handling Units
• 3. Chilled water from Computer building
• 4. Steam from campus distribution system
• B. Existing System – Water Side Issues (Slide 5)
• 1. Chilled water from Computer building
• a. Shortage of chilled water on extreme days
• b. East Campus Chiller Plant part of PSU 5-year plan
• 2. Steam from power plant
• a. Heat exchanger – steam to hot water
• b. Hot water for heating coils and reheat in VAV boxes
• C. Existing System – Air Side Issues (Slide 6)
• 1. Three AHUs
• a. Mechanical room on 3rd floor – valuable space
• 2. VAV System
• a. Inadequate ventilation air
• b. Large ductwork

• D. Proposed System Overview (Slide 7)
• 1. DOAS/Energy Recovery Air Handling Unit
• a. Location - basement
• 2. Fan Coil Unit (Parallel System)
• a. Replace each VAV box with a FCU
• E. Proposed System – DOAS/Energy Recovery AHU (Slides 8 & 9)
• 1. Maximum required outdoor air – 10,905 cfm
• 2. SEMCO Pinnacle Unit, Model PVS-18
• a. Air Flow Capacity

1) Low: 8,000 cfm 2) Mid: 10,000 cfm 3) High: 14,000 cfm

• 3. (show diagram of SEMCO unit in basement with clearances)
• 4. Heating/Cooling Coil Sizes
• 5. Efficiency of heat recovery – (diagram to show temperatures at various

locations within the unit)

• F. Proposed System – Fan Coil Units (Slides 10 & 11)
• 1. Heating Coil – secondary coil in FCU
• a. Piping already exists throughout the building
• b. No longer need hot water piping to AHU on 3rd floor
• 2. Cooling Coil – main coil in FCU
• a. Chilled water piping to Fan Coil Units integrated with sprinkler

piping(?)

• b. Primarily sensible cooling to reduce/eliminate condensate
• 3. (show diagram of components in FCU) and/or (3D drawing of FCU in

ceiling plenum with ductwork to three interview rooms)

• 4. FCUs circulate the room air to maintain the temperature required
• G. Proposed System – Operation Sequence/Controls (Slides 12 & 13)
• 1. Outdoor air damper on each FCU will have 2 settings
• a. 20% - unoccupied
• b. 100% - occupied
• 2. Interview Rooms/Conference rooms (intermittent occupancy)
• a. Occupancy of rooms is based on a schedule which is put into a

program either daily or weekly

• b. Only a section of rooms that will be used during that day will

receive the amount of OA required

• c. All other rooms will remain on the unoccupied setting of 20%

1) Saves energy and still prevents contaminants from building up in the space

• 3. All other spaces
• a. Daytime – occupied – damper at 100%
• b. Nighttime – unoccupied – damper at 20%

• III. Electrical (Slide 14)
• IV. Structural (Slide 15)
• V. Cost Comparison between VAV & DOAS/FCU (outline costs in a table) (Slide 16)
• A. Equipment Cost
• 1. First Cost
• 2. Maintenance
• B. Ductwork Cost (reduction in cost for proposed system)
• C. Piping Cost (additional piping for chilled water to FCUs)
• D. Electricity Cost (use $0.07/kwh for a comparison)
• E. Structural Savings (reduction in beam sizes on 3rd floor?)
• VI. Conclusions (Slide 17)
• VII. Thank you (Slide 18)
• VIII. Questions (Slide 19)