2. Problem Statement
S PSH M&O renovated room E 219 in the Olmsted Building
S The group is responsible for the HVAC portion
S The existing fan coil system needed to be replaced or
upgraded
S Two ME teams formed
S HVAC
S Controls
3. Teams Involved
S ME Teams – analyzing old and new system and choosing
a suitable control system.
S EE – 2 teams choosing wiring and lighting systems for
the room.
4. Scope
S Research 3 different
systems and determine
which works best
S Install and commission
HVAC system by end of
Spring 2015 semester
S Benchmark the newly
installed system
6. Alternatives
S Three different systems were considered.
S Two pipe fan coil system
S Variable air volume system
S Chilled beam system
S The updated Fan Coil system was determined to be the
most cost effective solution.
8. Installation Cost
S Fan Coil- basically already in place. Plumbing for units are already
installed in room.
S VAV- would require large ductwork and unit. Higher cost to retrofit.
S Chilled Beam- highest cost. would require plumbing fitting above
ceiling. Higher cost to retrofit. Would also require an additional system
to handle humidity.
9. Energy Efficiency
S Fan Coil- least efficient units to run. They rely the most on electricity to
circulate air.
S VAV- most efficient system. Keeps air at constant temperature and
varies fan speed to regulate temperature.
S Chilled Beam- requires fans to circulate heated air around room during
winter.
10. Maintenance
S Fan Coil- easiest and safest to maintain. Conveniently accessible
filters, located on ground level along walls.
S VAV- located above ceilings, reaching filters requires ladders,
increased fall risk, working above-head.
S Chilled Beam- requires working at ceiling level on ladder, increased
fall risk, most cleaning required.
11. Space Requirements
S Fan Coil- least amount of space required, retrofits very easily. No
above-ceiling additional ductwork or equipment required.
S VAV- requires the most above ceiling ductwork and equipment. Making
everything easily accessible would be difficult.
S Chilled Beam- would require additional plumbing as well as chilled
beams installed in ceiling. (42 ft of beams necessary to effectively cool
room)
12. Final Choice: Fan Coil Units
S FCBB0601C**ABH10AC3M00—
01x00H30000000000000
S B: Cabinet type: Vertical
S 060: Unit Size: 510 cfm; 48.02 MBh
S C: Coil: 4 Row Hot Water
13.
14. Manual Calculations
S ASHRAE 62.1 Ventilation Standards
S Vbz = RpPz+RaAz
S =(7.5*60)+(.06*1075)=514.5 cfm
S 12” x 5.5” Duct will deliver 260 cfm of
airflow to the room.
15. Energy Calculations
S Energy Savings:
S Lighting Controls: electricity reduction of 10%
S => 795 Btu/h = 1.45 million btu/year = cost saving of $56
S Temperature Controls: Temperature drift from 68°F to 72°F
S => 510.3 Btu/h = .93 million btu/year = cost saving of $36
S Total: If implemented for 10hr/day around $93 per room
can be saved over the warmest part of the year.
18. Benchmark Criteria
S Ceiling Diffusers
S Right Side - 240 cfm
S Front Wall – 530 cfm
S Left Side – 230 cfm
S Fan Coil Units
S High – 780
S Medium - 575 cfm
S Low – 435 cfm
S Lighting – 86.7°F
