trace™ 700 learning series module 3: methodology ... 700 learning series module 3: methodology...
Post on 14-Mar-2018
221 Views
Preview:
TRANSCRIPT
TRACE™ 700 Learning SeriesModule 3: Methodology & Output Interpretation
Load Design Phase MethodologyTRACE PsychrometricsBalancing Airfl owsASHRAE 62.1Detailed Output Interpretation Module 3 Exercise
Learning Objectives
• Summarize load and design methodology
• Understand design weather and design schedules
• Explore inputs that impact load and design calculations
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 1
Hourly Loads &Hourly Airflows
Peak LoadsLOAD PHASE
DESIGN PHASE
SYSTEMSIMULATION PHASE
EQUIPMENTSIMULATION PHASE
ECONOMICANALYSIS PHASE
Supply-Air Temp& Design Airflow
Energy Consumption & Demand
Economic Comparisonsof Alternatives
EquipmentPerformance
related entries calculations resultsdata
WeatherLibrarydesign
Utility Rate
BUILDINGlocation, envelope
design data
SYSTEMtype, economizerdedicated OA
phase
SYSTEM
EQUIPMENT
ECONOMICS
WeatherLibrary
typical
Load Design Phase
1
2
3
4
40
60
80
0 6 12 18 24
OA
DB
Tem
pera
ture
(°F
)
Design weather (cooling)
Time (hr)
July
Design weather (heating)
70
50
Design Weather
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 2
60
100
0 6 12 18 24
OA
DB
Tem
pera
ture
(°F
) Design weather (cooling)
Time (hr)
70
80
9088°F
92°F
Design Weather
• Day Types
• Cooling Design
• Weekday
• Saturday
• Sunday
• Heating Design
Sizing Equipment
Design day types are only used during the design calculationWeekday, Saturday, and Sunday day types used during all other calculations
All day types must be defined when creating a schedule
Day Types
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 3
Load Phaserelated entries calculations data
LOAD PHASEBUILDINGlocation, envelope
design data
WEATHER LIBRARYdesign
DETERMINE SPECIFIC ROOM MASSCREATE ROOMSconstruction typesroom mass average
Load Phaserelated entries calculations data
DETERMINE SPECIFIC ROOM MASS
LOAD PHASE
calculations
BUILDINGlocation, envelope
design data
CREATE ROOMSconstruction typesroom mass average
WEATHER LIBRARYdesign
DETERMINE CAPACITANCE OF ROOMCREATE ROOMSconstruction types
moisture capacitance
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 4
Load Phaserelated entries calculations data
DETERMINE SPECIFIC ROOM MASS
LOAD PHASE
calculations
BUILDINGlocation, envelope
design data
CREATE ROOMSconstruction typesroom mass average
WEATHER LIBRARYdesign
DETERMINE CAPACITANCE OF ROOM
CALCULATE ROOM HEAT GAINS
CREATE ROOMSconstruction types
moisture capacitance
CREATE ROOMSall inputs
Load Phaserelated entries calculations data
DETERMINE SPECIFIC ROOM MASS
LOAD PHASE
calculations
BUILDINGlocation, envelope
design data
CREATE ROOMSconstruction typesroom mass average
WEATHER LIBRARYdesign
DETERMINE CAPACITANCE OF ROOM
CALCULATE ROOM HEAT GAINS
CALCULATE ROOM LOADS(TETD, CLTD, DOE2, RP359, RTS)
CREATE ROOMSconstruction types
moisture capacitance
ACTIONSchange loadparameters
CREATE ROOMSall inputs
Peak Loads
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 5
Design Phaserelated entries calculations data
CALCULATE FAN HEAT
DESIGN PHASESYSTEMtype
WEATHER LIBRARYdesign
Peak LoadsCREATE SYSTEMS
fans
Design Phaserelated entries calculations data
CALCULATE FAN HEAT
DESIGN PHASESYSTEMtype
WEATHER LIBRARYdesign
Peak LoadsDETERMINE PLENUM & RETURN AIR CONDITIONCREATE SYSTEMS
advanced
CREATE SYSTEMSfans
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 6
Plenum/Return Air
Design Phaserelated entries calculations data
CALCULATE FAN HEAT
DESIGN PHASESYSTEMtype
WEATHER LIBRARYdesign
Peak LoadsDETERMINE PLENUM & RETURN AIR CONDITIONCREATE SYSTEMS
advanced
CREATE SYSTEMSfans
DETERMINE VENTILATION LOADCREATE ROOMSairflow
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 7
Design Phaserelated entries calculations data
CALCULATE FAN HEAT
DESIGN PHASESYSTEMtype
WEATHER LIBRARYdesign
Peak LoadsDETERMINE PLENUM & RETURN AIR CONDITIONCREATE SYSTEMS
advanced
CREATE SYSTEMSfans
DETERMINE VENTILATION LOAD
CALCULATE FAN & COIL LOAD COMPONENTSCREATE SYSTEMSFans and coils
CREATE ROOMSairflow
Design Phaserelated entries calculations data
CALCULATE FAN HEAT
DESIGN PHASESYSTEMtype
WEATHER LIBRARYdesign
Peak LoadsDETERMINE PLENUM & RETURN AIR CONDITIONCREATE SYSTEMS
advanced
CREATE SYSTEMSfans
DETERMINE VENTILATION LOAD
CALCULATE FAN & COIL LOAD COMPONENTSCREATE SYSTEMSFans and coils
CREATE ROOMSairflow
PSYCHROMETRIC CALCULATIONCREATE SYSTEMSTemp. and humidity
Supply Air Temp. and Design Airflow
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 8
• Load phase determines the peak loads and design phase determines the supply temperature and airflows
• Thermal mass and load methodology impacts the time of peak
• Design schedules play important role in design load calculations
Conclusion
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 9
Learning Objectives• Explain psychrometric loop process
• Discuss implications of entering airflows and supply air temperatures
• Understand the over or undersizing load component
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 10
Initial Conditions:
•Starts with room dry bulb and relative humidity
•Determines CFM using leaving coil temp equal to room dew point
Psychrometrics
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 11
PsychrometricsBegins loop considering outside air and return air
1
1
PsychrometricsBegins loop considering outside air and return air
Considers any return air heat gain
1
2
1 2
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 12
PsychrometricsBegins loop considering outside air and return air
Considers any return air heat gain
Determines mixed air conditions based on return air & outdoor air conditions
1
2
3
1 2
3
PsychrometricsBegins loop considering outside air and return air
Considers any return air heat gain
Determines mixed air conditions based on return air & outdoor air conditions
Follows generic coil curve to determineleaving cooling coil condition
1
2
3
4
1 2
3
4
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 13
4
PsychrometricsBegins loop considering outside air and return air
Considers any return air heat gain
Determines mixed air conditions based on return air & outdoor air conditions
Follows generic coil curve to determineleaving cooling coil condition
Considers any supply air heat gain
1
2
3
4
51 2
3
5
4 1 2
3
5
PsychrometricsBegins loop considering outside air and return air
Considers any return air heat gain
Determines mixed air conditions based on return air & outdoor air conditions
Follows generic coil curve to determineleaving cooling coil condition
Considers any supply air heat gain
Calculates SHR
If loop does not close, repeatsteps 2 through 6 up to 30 times
1
2
3
4
5
66
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 14
CFM = Q / [1.1 x (TROOM ‐ TSUPPLY)]
Specifying Design Conditions
TSUPPLY = TROOM ‐ Q / (1.1 x CFM)
Specifying Design Conditions
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 15
Specifying Design Conditions
OV/UNDR SIZING= 1.1 x CFM x (TROOM ‐ TSUPPLY) ‐ Q
Conclusion
• Psychrometrics are used to solve for design supply temperature
• Airflow is calculated using the sensible heat equation
• Over or undersizing loads can occur by specifying supply temperatures and/or airflows
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 16
Learning Objectives
• Defining balancing airflows
• Explain how transferring airflow relates to balanced airflow
• Implement transfer airflow in the program
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 17
room
Airflow Balance+ System Exhaust = Ventilation + InfiltrationRoom Exhaust
system exhaust
ventilation
infiltration
room exhaust
supply air
return air
ACU
150 cfmInfiltration (25 cfm)Ventilation (125 cfm)
75 cfmSystem Exhaust
75 cfmRoom Exhaust
Restroom
Airflow Balance
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 18
Lab B
Lab A
150 cfmInfiltration (25 cfm)Ventilation (125 cfm)
75 cfmRoom Exhaust
150 cfmRoom ExhaustC
orridor
Airflow Balance
Lab B
Lab A
150 cfmInfiltration (25 cfm)Ventilation (125 cfm)
50 cfmRoom Exhaust
100 cfmRoom ExhaustC
orridor
100 cfmTransfer Air
150 cfm requested
50 cfmTransfer Air
75 cfm requested
Airflow Balance
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 19
Airflow BalanceLesson 2: Program Methodology
SCREENCAST
Conclusion
• Program will not model over or under pressurized spaces
• Adjacent air transfer and room exhaust inputs allow for modeling of transfer air
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 20
Learning Objectives
• Defining the standard
• Describe the calculation process
• Implementation of ASHRAE Standard 62.1
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 21
• Purpose“…specify minimum ventilation rates and indoor air quality that will be acceptable to human occupants…”
• Methods Ventilation Rate Procedure (VRP)
Indoor Air Quality Procedure (IAQP)
ASHRAE Standard 62.1
• Zone Calculations Determine area/occupancy rates
Table 6-1 Determine Zone Air Distribution Effectiveness (Ez)
Table 6-2 Calculate Breathing Zone Outdoor Airflow (Vbz)
Vbz = RpPz + RaAz
Calculate Zone Outdoor Airflow (Voz)Voz = Vbz / Ez
ASHRAE Standard 62.1
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 22
• Multi-Zone Calculation Determine Zone Primary OA Fraction (Zp)
Zp = Voz / Zone Primary Airflow (Vpz) TRACE assumes minimum stop airflow for both
cooling and heating Determine Occupant Diversity (D) (not required)
D = Ps / Σall zonesPz
Determine Uncorrected OA Intake (Vou)Vou = D Σall zones Rp Pz + Σall zones Ra Az
ASHRAE Standard 62.1
• Multi-Zone Calculation Determine System Ventilation Efficiency (Ev)
Table 6-3 or Appendix A
Calculate Outdoor Air IntakeVot = Vou / Ev
ASHRAE Standard 62.1
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 23
ASHRAE Standard 62.1Lesson 2: Program Methodology
• TRACE and ASHRAE Standard 62.1 Setup
• Create Rooms• Create Systems
Analysis• ASHRAE 62.1 Report• Determine Critical Space(s)
Additional Steps• Understand Critical Space(s)• Adjust Minimum Stops
• Airflows tab• Max Vent (Z) Ratio Allowed
SCREENCAST
ASHRAE Standard 62.1Lesson 2: Program Methodology
ASHRAE Standard 62.1 Report
1.System Ventilation Parameters Average Outdoor Air Fraction (Xs) System Ventilation Efficiency (Ev) Outdoor Intake Flow (Vot)
2.Zone Ventilation Parameters Breathing Zone Outdoor Airflow (Vbz) Zone Outdoor Fraction (Voz)
3.Zone Ventilation Calculations Cooling design and heating design Zone outdoor air fraction (Zd) Critical zone identified with *Asterisk*
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 24
ASHRAE Standard 62.1Lesson 2: Program Methodology100% OA
Max Zd = 75%
SCREENCAST
Conclusion• Program uses the Ventilation Rate Procedure
• Use the Standard 62.1 report for zone level and system level calculation outputs
• 100% OA scenarios can be corrected using the max Zd input
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 25
Learning Objectives
• Comparison of design outputs for various system types VAV with reheat
Single zone constant volume
VRF with DOAS
• Discuss the design load values on the reports
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 26
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 27
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 28
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 29
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 30
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 31
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 32
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 33
SCREENCAST
SCREENCASTSCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 34
SCREENCASTSCREENCAST
SCREENCASTSCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 35
SCREENCAST
SCREENCAST
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 36
Conclusion• Before viewing checksum reports, look at the
System Component Selection report for coil and fan locations
• TRACE™ sizes coils for worst case scenarios• Differences in time of coil peak and space peak lead
to different component loads and airflows on checksums report
• Psychrometric report values are elevation specific
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 37
Purpose:• Practice basic inputs and navigation.Procedure:• Enter the weather location, building parameters,
and system information as described.• Calculate the file.• Review questions.Payoff:• Familiarity with the program navigation from start
to finish.• Understanding of the basic entries required
by the program.
Exercise:
Bringing It All Together
Note:Create a new project. Do not change any default values unless noted
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 38
Purpose:Practice basic inputs and navigation
Methodology:CLTD (cooling), UATD (heating)You can change this through the Actionsmenu and select Change Load Parameters.
Location: Tampa, Florida Note:Use default values unless otherwise noted
Exercise:
Bringing It All Together
phone I 608.787.3926
fax I 608.787.3005
email I cdshelp@trane.com
Web I www.tranecds.com
contact us
TRACE™ 700 Learning Series
©Trane a business of Ingersoll Rand Module 3: Methodology & Output l 39
top related