hvac presentation

S

Siemens Room RenovationHVAC System

Donald MorganNick HuntSteven KinneyDavid Amrhein

Problem Statement

PSH M&O renovated room E 219 in the Olmsted Building The group is responsible for the HVAC portion The existing fan coil system needed to be replaced or

upgraded Two ME teams formed

HVAC Controls

Teams Involved

ME Teams – analyzing old and new system and choosing a suitable control system.

EE – 2 teams choosing wiring and lighting systems for the room.

Scope

Research 3 different systems and determine which works best

Install and commission HVAC system by end of Spring 2015 semester

Benchmark the newly installed system

Scope: Approach Break Down

Alternatives

Three different systems were considered. Two pipe fan coil system Variable air volume system Chilled beam system

The updated Fan Coil system was determined to be the most cost effective solution.

Alternatives Metric

Installation Cost

EnergyEfficiency

Maintenance

Space Requirements

Total

Fan Coil 1 3 1 1 6

VariableAir Volume (VAV)

2 2 2 3 9

Chilled Beam 3 1 3 2 9* This scale used 1 as the best and 3 as the worst. Once each category

was scored for each system, a total was taken and the system with the lowest score was chosen.

Installation Cost

Fan Coil- basically already in place. Plumbing for units are already installed in room.

VAV- would require large ductwork and unit. Higher cost to retrofit.

Chilled Beam- highest cost. would require plumbing fitting above ceiling. Higher cost to retrofit. Would also require an additional system to handle humidity.

Energy Efficiency

Fan Coil- least efficient units to run. They rely the most on electricity to circulate air.

VAV- most efficient system. Keeps air at constant temperature and varies fan speed to regulate temperature.

Chilled Beam- requires fans to circulate heated air around room during winter.

Maintenance

Fan Coil- easiest and safest to maintain. Conveniently accessible filters, located on ground level along walls.

VAV- located above ceilings, reaching filters requires ladders, increased fall risk, working above-head.

Chilled Beam- requires working at ceiling level on ladder, increased fall risk, most cleaning required.

Space Requirements

Fan Coil- least amount of space required, retrofits very easily. No above-ceiling additional ductwork or equipment required.

VAV- requires the most above ceiling ductwork and equipment. Making everything easily accessible would be difficult.

Chilled Beam- would require additional plumbing as well as chilled beams installed in ceiling. (42 ft of beams necessary to effectively cool room)

Final Choice: Fan Coil Units

FCBB0601C**ABH10AC3M00—01x00H30000000000000 B: Cabinet type: Vertical 060: Unit Size: 510 cfm; 48.02 MBh C: Coil: 4 Row Hot Water

Manual Calculations

ASHRAE 62.1 Ventilation Standards Vbz = RpPz+RaAz =(7.5*60)+(.06*1075)=514.5 cfm

12” x 5.5” Duct will deliver 260 cfm of airflow to the room.

Energy Calculations

Energy Savings: Lighting Controls: electricity reduction of 10%

=> 795 Btu/h = 1.45 million btu/year = cost saving of $56

Temperature Controls: Temperature drift from 68°F to 72°F => 510.3 Btu/h = .93 million btu/year = cost saving of

$36

Total: If implemented for 10hr/day around $93 per room can be saved over the warmest part of the year.

Benchmarking the Room

Benchmarking the Room

Benchmark Criteria

Ceiling Diffusers Right Side - 240 cfm Front Wall – 530 cfm Left Side – 230 cfm

Fan Coil Units High – 780 Medium - 575 cfm Low – 435 cfm

Lighting – 86.7°F

Revit Drawing of Olmsted 219E

Questions?