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PICV Seminar
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AgendaAgenda
1 . Pr e c i s io n
2 . S im p l e
3 . Fl e x i b l e
4 . En e r g y s a v i n g s
5 . Su m m a r y
extra Re f e r e n ce s
1 . Pr e c i s io n
2 . S im p l e
3 . Fl e x i b l e
4 . En e r g y s a v i n g s
5 . Su m m a r y
extra Re f e r e n ce s
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1. Precision1. Precision
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WhatWhat is PICV?is PICV?
Two in one
Simple setting
Perfect balance
Perfect control
Cost saving
Compact design
Two in one
Simple setting
Perfect balance
Perfect control
Cost saving
Compact design
PrecisionPrecision
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A control valve…AA controlcontrol valvevalve……
How does it work?How does it work?
PrecisionPrecision
...and a differential pressure controller...and a...and a differentialdifferential pressurepressure controllercontroller
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The differential pressure controller keeps a
constant pressure across the control valve
TheThe differentialdifferential pressurepressure controllercontroller keepskeeps aa
constantconstant pressurepressure acrossacross thethe controlcontrol valvevalve
How does it work?How does it work?
Cv x √∆pCCv xv x √∆√∆ppconstantconstantconstantQ =Q =Q =
PrecisionPrecision
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So, stable control with maximal precisionSoSo,, stablestable controlcontrol withwith maximalmaximal precisionprecision
How does it work?How does it work?
Conclusion:
Constant ∆p across the control valve, resulting in accurateflow limitation and 100% authority.
PrecisionPrecision
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Facts:Long stroke
No 100% authority each setting
Facts:Long stroke
No 100% authority each setting
PICV designconcept A (example AB-QM)PICV designconcept A (example AB-QM)PICV conceptdesign BPICV conceptdesign B
MMM
PrecisionPrecision
Facts:limiting the stroke
100% authority at each setting
Facts:limiting the stroke
100% authority at each setting
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PICV concept BPICV concept BPICV concept APICV concept A
MMMMMM
M
10V
0V
M
10V
0V
PrecisionPrecision
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Uitleg:
-100% autoriteit
-door verkorten van slaglengte
Test and research organisation BSRIAtested different PICV Brands !Test and research organisation BSRIATest and research organisation BSRIAtested different PICV Brands !tested different PICV Brands !
PrecisionPrecision
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AvailibilityAvailibility
Types ½ “ till 10”
Control flow from 0.8 GPM till 1232 GPM
Types ½ “ till 10”
Control flow from 0.8 GPM till 1232 GPM
8” – 10” 88” ” –– 1010” ” 1/2”- 1 ¼” 1/21/2” ” -- 11 ¼” ¼” 1 ½” – 4” 11 ½” ½” –– 44” ” 5” – 6” 55” ” –– 66” ”
PrecisionPrecision
New !New !New !
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2. Simple2.Simple
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07/10/2010 13
SelectionSelection
Selection is dependent only on the flow
No calculation
Selection is dependent only on the flow
No calculation
66 GPM
2 ½”3”
SimpleSimple
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CalculateCalculate the setting:the setting:
QQmaximummaximum (AB(AB--QM)QM) _____________ _____________ QQDesignDesign XX 100%100%
Setting /Setting / SelectionSelection
ExampleExample::
Design =Design = 2.4 GPM2.4 GPM
½”½” valvevalve,,
maxmax flowflow = 4 GPM= 4 GPM
SimpleSimple
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CalculationCalculation::
2.4/4 x 100% =2.4/4 x 100% =
60%60%
Setting /Setting / selectionselection
Simple:
In the whole range settingis done on percentage !
Simple:Simple:
In the whole range settingIn the whole range setting
is done on percentage !is done on percentage !
SimpleSimple
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PICV saves money at every stage:PICV saves money at every stage:
Calculation
Installation / Commissioning
Daily use
Calculation
Installation / Commissioning
Daily use
SimpleSimple
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CalculationCalculation
NoNo CCvv calculationscalculations neededneeded !!
v
pC Flow Δ=
SimpleSimple
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Save money on calculationsSave money on calculations
A=Δp open valve
Δp closed valve
(x 100%)
Recommendation: A > 0.5
Time saving on calculation: No Authority calculationsneeded, just selection
Time saving on calculation: No Authority calculationsneeded, just selection
To calculate a normal control valve you need to size theCv value and the Authority
To calculate a normal control valve you need to size theCv value and the Authority
SimpleSimple
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Savings during installation/commissioningSavings during installation/commissioning
Possible savings:
• Installation time ½” valve
approx. 70 minutes
• Installation time 1 ½” approx. 80 minutes
• Installation time 3” approx. 120minutes
• Commissioning (normally atleast 15 min./valve)
Possible savings:
• Installation time ½” valve
approx. 70 minutes
• Installation time 1 ½” approx. 80 minutes
• Installation time 3” approx. 120minutes
• Commissioning (normally atleast 15 min./valve)
Terminal Unit
SimpleSimple
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InIn variablevariable flowflow systemssystems thethe
availableavailable differentialdifferential pressurepressure
variesvaries
Savings during daily useSavings during daily use
SimpleSimple
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BecauseBecause ofof thisthis thethe
roomtemperatureroomtemperature willwill fluctuatefluctuate
and the actuator has toand the actuator has to
compensatecompensate for for thatthat
Savings during daily useSavings during daily use
SimpleSimple
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Because the PICV
automatically corrects for
varying pressures…
BecauseBecause the PICVthe PICV
automaticallyautomatically correctscorrects for for
varyingvarying pressurespressures……
Savings during daily useSavings during daily use
SimpleSimple
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… the actuator needs
much less movements to
maintain a constant
roomtemperature.
…… the actuatorthe actuator needsneeds
muchmuch lessless movementsmovements toto
maintainmaintain a constanta constant
roomtemperatureroomtemperature..
Savings during daily useSavings during daily use
SimpleSimple
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So: More stable
roomtemperatures and a
longer actuator life span.
SoSo: More: More stablestable
roomtemperaturesroomtemperatures and aand a
longer longer actuatoractuator lifelife span.span.
Savings during daily useSavings during daily use
SimpleSimple
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3. Flexible3. Flexible
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Fancoil unit cooling heating Fancoil unit cooling heating
PICVPICV applicationsapplications
FlexibleFlexible
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PICVPICV applicationsapplications
• AHU cooling/heating•• AHUAHU coolingcooling / /heatingheating
FlexibleFlexible
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4. En e r g y s a v i n g s 4. En e r g y s a v i n g s
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SavingsSavings
Efficient
production of heat/cool
Efficient pumping
Efficient temperturecontrol
Valves cost is typcally lessthen 2% of total investment
in mechanical equipment,
however sound hydronic
yields high efficency of
capital investment.
Energy SavingsEnergy Savings
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Energy saving potentialEnergy saving potential
40%
30%
25%
5%
Chiller
Fans
Pumps
Other
Avoid low dt
syndrome
Variable primary –
more efficient
chiller operation
Variable flow
Dynamic flow
limitation
Better temperature
control allow higheraverage temperature –
thus decrease total
energy usage
Energy SavingsEnergy Savings
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Ashrae ArticleAshrae Article
Facts*:
Most (80%) of complaint are of thermal sensation nature.
In average 20% of maintenance cost are due to solving those complaints.
According to survey made on 280 th m2, with 7.500 occupants there were 2300complaints out of which 1650 were thermal sensation caused by poor controlperformance and HVAC faults. In average 1,8 hours of maintenance work wasspend for one complaint, meaning almost 3.000 man hours per year – in thisparticular case 20% of all energy costs.
*Extracts from article: Predicting the Frequency and Cost of Hot and Cold Complaints inBuildings,Clifford C. Federspiel, Ph.D., Associate Member ASHRAE
Facts*:
Most (80%) of complaint are of thermal sensation nature.
In average 20% of maintenance cost are due to solving those complaints.
According to survey made on 280 th m2, with 7.500 occupants there were 2300complaints out of which 1650 were thermal sensation caused by poor controlperformance and HVAC faults. In average 1,8 hours of maintenance work wasspend for one complaint, meaning almost 3.000 man hours per year – in thisparticular case 20% of all energy costs.
*Extracts from article: Predicting the Frequency and Cost of Hot and Cold Complaints inBuildings,Clifford C. Federspiel, Ph.D., Associate Member ASHRAE
Energy SavingsEnergy Savings
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Temparature control performanceTemparature control performance
Benefits of good temperature control can be seen in:
• Less claims and cost related to them
• Energy savings due to improved temperature setting policy thatallows smaller temperature difference between building and itssurounding
Benefits of good temperature control can be seen in:
• Less claims and cost related to them
• Energy savings due to improved temperature setting policy thatallows smaller temperature difference between building and itssurounding
Energy SavingsEnergy Savings
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σmean temperature σ
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Better control means
less possibility for claim
Better control means
allows to change settingpolicy keeping same
claim ratio but increase
mean temperature and
thus reduce heat
transfer fromsurrounding
A
C
DB
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Standard deviation of room temperature
N u m b e r o f c o m p l a i n t s
Slow rate of change
Fast rate of change
Result of survey - Predicting complaints
Good
Bad
Energy SavingsEnergy Savings
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Diagnostic Logger
Coil Water
TempIn & Out
Air Temp In Air Temp Out
AB-QM Energy SavingsAB-QM Energy Savings
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watersensor
airsensor
data
logger
Data loggerData logger
AB-QM Energy SavingsAB-QM Energy Savings
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Set up Hydronic AnalyzerSet up Hydronic Analyzer
FCU /AHU
AB-QM
M
Traditional controlvalve with circuitsetter
FCU /AHU
AB-QM Energy SavingsAB-QM Energy Savings
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SavingsSavings
Savings as a result of the cases compares to
conventional solution:
• Pump: from 10% to 50%
• Control performance: 5 to 10% on total energy• Chiller/boiler: 10 to 25% increased efficiency
Savings as a result of the cases compares to
conventional solution:
• Pump: from 10% to 50%
• Control performance: 5 to 10% on total energy• Chiller/boiler: 10 to 25% increased efficiency
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5. Summary5. Summary
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SummarySummary
1 . Pr e c i s i o n
100% authority at each flow(setting)
Accurate at low P
2 . Si m p l e
Easy selection
No calculation on kv and authority needed.
Only setting the flow
3 . Fl e x i b le
For each application we have a sollution
4 . En e r g y sa v i n g s
With PICV can be saved on energy, so money
1 . Pr e c i s i o n
100% authority at each flow(setting)
Accurate at low P
2 . Si m p l e
Easy selection
No calculation on kv and authority needed.
Only setting the flow
3 . Fl e x i b le
For each application we have a sollution
4 . En e r g y sa v i n g s
With PICV can be saved on energy, so money
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6. Re f e r e n ce s 6. Re f e r e n ce s
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Rabobank HQ,The Netherlands
World Expo PerformanceCenter, Shanghai, China
Airbus Hangar, France
Deutsche Bank, Germany
Head office of W.SAtkins, Dubai -
United Arab Emirates
Sea Towers Gdynia,
Poland
South DanishUniversity, Denmark
AB-QM ReferencesAB-QM References
UMKC Student Union Building,
Kansas City, United States
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Questions?Questions?