PIBCV- Danfoss-ABTIN
43
1 million reasons to choose the best www.abqm.danfoss.com 3 years payback time Case studies prove that investing in Danfoss PIBCV’s pays itself back in less than 3 years.
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Transcript of PIBCV- Danfoss-ABTIN
1 million reasonsto choose the best
www.abqm.danfoss.com
3 yearspayback time
Case studies prove that investing in Danfoss PIBCV’s pays itself back in less than 3 years.
Pressure Independent Balancing and Control Valve (PIBCV)
Portfolio overviewD
C,
HV
AC
sys
tem
s
AB-QM S AB-QM XL AB-QM XXL
PN 16 16 16 16
DN 10 … 32 40 … 100 125 … 150 200 … 250
Min p 16 … 20 kPa 30 kPa 30 / 60 (HF version) kPa 30 / 60 (HF version) kPa
Max p 400 kPa 400 kPa 400 kPa 400 kPa
PIBCV (PL28) range overview
TWA-Z; ABN A5; QT; ABNM;AME 110NL; etc.
AMV(E) 435 (QM);AME 25 SU/SD
AMV(E) 55, 56 (QM) AME 655, 658 SU/SD AMV(E) 85, 86 (QM)
Actuator‘s range overview
AB-QM
• Energy savingso built in p control eliminates any overflow
improves temperature control (increases T)o ~100% valve authority
• Easy to installo can be mounted in the flow or in the returno three functions in one valve body (control valve,
flow limitation & p control); 3 in 1o easy to size and select, wide range of actuators
(ON/OFF and 0-10V, SU/SD, 230 & 24 V, etc.)o wide range DN 10LF … 32HF (30-3520 l/h)
• Reliabilityo linear valve characteristic + lin. or log. actuatoro stroke detection by actuatoro more than 1,5 million sold valves prove it
• Easy to maintaino flow setting can be modified without tool o phased commissioningo simple pump optimisationo Presetting above 100% (up to 110-120%)
PIBCV control application• For different type of TUs (FCU, small
AHU, chilled beam, solar panels, etc.), one pipe riser
• In commercial building as “end point” control in variable or const. flow syst.
• In residential buildings – one pipe riser controller– two pipe “staircase” control (no TRV)
• Ensures 100% authority for control valve by integrated pressure difference controller
• Eliminates any overflow in the system• Suitable for ON/OFF or proportional
control with wide range of actuators• Essential element of hydraulic
balancing in variable flow system
APPLICATION• AHU, Heating/Cooling
APPLICATION• Fancoil unit,
Heating/Cooling
Product portfolio
AB-QM &
TWA-Z
AB-QM& ABNM LOG/LIN
AB-QM& AME/V
110/120 NL
AB-QM& AME 15QM
AB-QM (HF)& AME 55QM
AB-QM (HF) &AME 85QM
AB-QM DN10 - DN250Flow capacity 30 l/h - 443.000 l/h
Danfoss HBC | 13
Agenda
What is the AB-QM How does the AB-QM work Setting the AB-QM Selections Calculation Product range Applications
How does the AB-QM improve your installation
How does the AB-QM save money
How does the AB-QM save energy
References
Conclusion
Danfoss HBC | 14
What is the AB-QM?
The AB-QM is a Pressure Independent Balancing and Control Valve (PIBCV):
Control valve Automatic balancing function
Danfoss HBC | 15
How does the AB-QM work
The top part of the AB-QM is a control valve
Danfoss HBC | 16
How does the AB-QM work
The bottom part of the AB-QM is a differential pressure controller that keeps a constant differential pressure across the control valve independent of pressure fluctuations in the system
Danfoss HBC | 17
How does the AB-QM work
The pressure controller keeps a constant differential pressure across the control valve
Q = Kv x √∆P
Constant differential pressure means: Constant flow Full authority
Danfoss HBC | 18
Setting the AB-QM can be done at any time, with or without pressure on the system
Maximum flow is marked on the valve
Calculate setting percentage: Qdesign/Qmax*100 %
example: 270/450*100% = 60%
Set the AB-QM to the desired setting percentage
Setting the AB-QM (DN10-DN32)
Danfoss HBC | 19
For the larger sizes the principle of the setting is the same: Calculate setting percentage Set the valve
The scale indicates the setting
Setting the AB-QM (DN40-DN250)
Danfoss HBC | 20
Product range
AB-QM &
TWA-Z
AB-QM& ABNM LOG/LIN
AB-QM& AME/V
110/120 NL
AB-QM& AME 15QM
AB-QM& AME 55QM
AB-QM &AME 85QM
AB-QM is available in the full range from DN10 to DN250
Flow range from 30 l/h to 442.000 l/h
Danfoss HBC | 21
The AB-QM can be combined with a large range of actuators
Our gear actuators have the following unique features: Self calibration to the stroke of the AB-QM Lin/Log switch to make the same valve/actuator
combination linear or logarithmic
Danfoss HBC | 22
The AB-QM can be combined with a large range of actuators
For applications that have no focus on control precision we offer: TWA-Z thermal On/Off actuators for DN10 to DN20
24 and 230 Vac Normally Open (NO) and Normally Closed
versions (NC) AMI 140 On/Off gear actuators for DN25 to DN32 ABNM Thermal 0-10 V actuators (DN10 to DN32)*
ABNM LOG for Water->Air heat exchangers ABNM LIN for Water->Water heat exchangers
* for DN25 and DN32 only to 90% of maximum flow
Danfoss HBC | 23
Selection
The selection of the AB-QM is based on the flow only
Danfoss HBC | 24
Calculation
To calculate needed pump head
Determine the critical circuit
Calculate pump head without AB-QM
Find starting pressure AB-QM(16-30 kPa)
Add the starting pressure to the pump head
Danfoss HBC | 25
Applications
AHU, Heating/Cooling
Danfoss HBC | 26
Applications
Fancoil unit, Heating/Cooling
Danfoss HBC | 27
Applications
Radiant panels Heating/Cooling
Danfoss HBC | 28
How does the AB-QM improve your installation
In a conventional installation pressures fluctuate because valves are opening and closing
The actuator needs to compensate for that constantly and will start hunting. Unstable temperature control Reduced lifespan of actuator
Danfoss HBC | 29
How does the AB-QM improve your installation
With the AB-QM the pressure fluctuations are compensated by the pressure controller No temperature fluctuations No constantly moving actuator
Danfoss HBC | 30
How does the AB-QM save money Less calculation
Less components
Less mounting
Less energy
3 yearspayback time
Case studies prove that investing in Danfoss PIBCV’s pays itself back in less than 3 years.
Danfoss HBC | 31
Less calculations
Selection of the AB-QM is based purely on the flow: No KV calculations No need to calculate authority
Danfoss HBC | 32
Less Mounting/Installation
Mounting cost Installation time DN15 valve
approx. 70 minutes Installation time DN40
approx. 80 minutes Installation time DN80
approx. 120 minutes
Less commissioning time (normally atleast 30 min./valve)
No delay of handover
Phased handovers
Danfoss HBC | 33
How does the AB-QM save energy Potential savings
pumping ∆T to chiller Temperature setting
Danfoss HBC | 34
Energy savings on pumping
Pump head (Bar)
Flow(m3/h)
Days per year
Load profile
0,8 120 285 Full load
0,8 100 285 Standard
1,6 120 285 Standard
Energy per year
Energy cost per valve per
year (€)
31000 15,5
9900 5,0
22900 11,5
•3-way valves require full load all the time
•PICV allows more precise flow limitation
•Traditional control requires bigger pumphead to achieve sufficient authority
3-way
AB-QM
2-way
NB: Calculations based on an average installation with 100m3/h and 200 DN20 valves with a flow of 500 l/h. 1 kW = 0,1 Euro
Danfoss HBC | 35
0,0
2,0
4,0
6,0
8,0
0 20 40 60 80 100
% of load
COP
AB‐QM Traditional control valve
0,50
0,60
0,70
0,80
0,90
1,00
0 20 40 60 80 100
% of load
kW/to
n
AB‐QM Traditional control valvel TraditionalAB-QMDesign
Energy saving on chiller
A chiller is designed for 100% load but operates mostly (in case of traditional control valve) at 40% due low ∆T syndrome. Consequently additional chillers will be started by the control system to achieve requested cooling.
AB-QM will increase chiller performance significantly, as we avoided overflow and thus are we able to increase ∆T
Danfoss HBC | 36
Energy saving on Chiller Higher (designed) return allows chiller to run more efficeint
Variable primary hydronics allow to run chillers in so called maxCap more demanding to control valves
To ensure maximum efficiency make sure to maximize ΔT
Danfoss HBC | 37
Increasing ∆T leads to higher energy efficiency
Higher return temperature (with 3 K) for chillers (cooling system) results >10% energy saving
Lower return temperature (< 60ºC) for condensing boilers (heating system) results in ~10% energy saving
Danfoss HBC | 38
Energy saving on the temperature setting
What constitutes a comfortable temperature is individual and varies through the day
Imprecise control increases the chance of discomfort
Discomfort causes complaints and increased use of energy
By stabilizing the control the temperature can be optimised
increasing the setting with 1K saves 10 to 16% of energy (Cooling)
Danfoss HBC | 39
Energy saving summary
By reducing overflows the pump can run on a lower speed
By improving the DT of the installation the efficiency of the chiller can be improved
By increasing the performance of the control the temperature setting can be optimised
Danfoss HBC | 40
References and Conclusion
Danfoss HBC | 4141
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Danfoss HBC References
Danfoss HBC | 4242Danfoss Heating Division – for internal use only ©
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Danfoss HBC References
Danfoss HBC | 43
Conclusion
The Danfoss AB-QM is a Pressure Independent Balancing and Control Valve (PIBCV) Perfect control Automatic balance
The AB-QM is easy to select and to set
The AB-QM saves money
The AB-QM saves energy
The AB-QM is a proven product
