trace™ 700 learning series module 4: airside systems
TRANSCRIPT
TRACE™ 700 Learning SeriesModule 4: Airside Systems
System Selection and Sizing Coils and Fans ZoningModule 4 Exercise
Learning Objectives• Airside system considerations
• Understand how fans and coils are sized
• Properly configure systems per the building design
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TRACE™ 700 Considerations
• When selecting a system you are: Defining an air path Defining coil and fan location NOT the number of units or equipment
TRACE 700 Considerations• Default information associated
with each system: Fans
− Sizing method (block, peak)− Location (system, zone, or room level)− Configuration (draw- thru, blow- thru)
Coils− Sizing method (block, peak)− Location (system, zone, or room level)− Configuration (auxiliary, preheat, main, or reheat)
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Sizing: Peak versus Block
9am Noon 3pm
Room 1 100 200 150
Room 2 250 150 350
Room 3 300 50 250
Total 650 400 750
200
300
350 Peak Airflow850 cfm
Block Airflow 750 cfm
System Selection Schematic
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Heat Pick Up Calculation
Qfan = FANcfm x SP x C
where...
FANcfm = the fan airflowSP = the user entered value for fan static pressureC = a constant that represents the temperature rise / in w.g. of static pressureMTReff = the user entered fan efficiencyBLDeff = the user entered mechanical efficiency of the fan
(MTReff x BLDeff)
Example• Variable-air volume (VAV) with reheat
system that serves West exterior exposure spaces. Auxiliary coil for skin loads
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Conclusion
• How to select a system
• Important parameters to be modified
• How systems equipment is sized
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Learning Objectives• Determine where the fan and coils are located in
the TRACE system
• How to properly assign rooms and zones to airside systems
• Proper zoning techniques
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Room level• Fan coils• Water-source
heat pumps
Airside System LevelSystem level VAV cooling coil Preheat coil VAV primary fan
Zone level Single-zone cooling
and heating coils VAV heating coils Single-zone fans
System Component Selection Summary report
Airside System Level
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System LevelVariable Air Volumewith reheat
System Level
1 Plenum
RoomA
RoomB
AHU 1
=
RoomA
RoomB
AHU 1 AHU 2
RoomA
RoomB
AHU 1
Variable Air Volumewith reheat
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System LevelUnderfloor Air DistributionParallel fan powered
preheat coil
cooling coil
System Level
1 Plenum
RoomA
RoomB
AHU 1
=
RoomA
RoomB
AHU 1 AHU 2
RoomA
RoomB
AHU 1
Underfloor Air DistributionParallel fan powered
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Zone LevelConstant VolumeSingle zone
Zone Level
1 Plenum
RoomA
RoomB
RTU 1 RTU 2
=
RoomA
RoomB
RTU 1 RTU 2
1 Plenum
RoomA
RoomB
RTU 1
Constant VolumeSingle zone
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Zone LevelChilled BeamsActive chilled beam
Zone Level
1 Plenum
RoomA
RoomB
RTU 1 RTU 2
=
RoomA
RoomB
RTU 1 RTU 2
1 Plenum
RoomA
RoomB
RTU 1
Chilled BeamsActive chilled beam
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Room LevelWater‐source Heat Pumps orVariable Refrigerant Volume
Room Level
1 Plenum
Room A Room B
= =
Room A Room B
Water‐source Heat Pumps orVariable Refrigerant Volume
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Conclusion• Proper zoning can significantly reduce potential
of over or under conditioning spaces
• To properly zone, keep similar spaces together
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Module 4:Exercise
TRACE 700™
Purpose:• Determine what templates are needed and create them.• Apply rooms to appropriate systems.
Procedure:• Determine what templates are needed and create them.• Create applicable rooms and systems.• Calculate the file.• Review questions.
Exercise: Templates and Systems
PayoffUnderstand the use
of templates and find out how
repetitive inputs can be eliminated.
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Details:1-story building30% glass on all exposures
Location:Memphis, Tennessee
Methodology:CLTD (cooling), UATD (heating)
Note: Use the default values for any information not given.
Review all information prior to beginning the exercise.
phone I 608.787.3926
fax I 608.787.3005
email I [email protected]
Web I www.tranecds.com
contact us
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