Transcript Diffusers

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Lindab Pascal
- Simplified VAV solution with full potential...
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Constant pressure solution
Solution based on constant pressure regulation
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Active diffusers with built-in damper plate, which is controlled by a room regulator with 0-10V signal
Exhaust air flow regulation by measuring airflow in supply duct
Pressure regulation in supply distribution duct
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Constant pressure solution
Exhaust balance with flow measurement – master/slave function
Measuring unit has a minimum flow rate limit
Measuring unit requires straight duct before the unit
Addition of several supply to control one exhaust is difficult
FRU/VRU settings must be done special from factory
Extra components for flow measurement
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Constant pressure solution
Active diffusers
Diffusers with high impulse even at low airflows
Diffuser settings must be done individually from factory
Not possible to put on stock
Labelling with ID must be done for each room
Airflow settings are based on theoretical calculated pressure (no airflow regulation)
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Correct pressure = correct airflow
Higher pressure = higher airflow
Lower pressure = lower airflow
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Constant pressure solution
Pressure regulation
Areas with constant flow balanced with
simple balancing damper
Limited pressure allowance in diffuser
Size of pressure zone not to big
Difficult keeping constant pressure in
all parts of a zone
High demand on duct design
Limited flexibility when reconstructed
Exact placement of pressure sensor
Higher energy consumption due to
higher minimum pressure
Fan optimizer only on zone dampers
Extra components for pressure
regulation
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Vision
Our vision is:
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Install a standard VAV system with room temperature regulation
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Make settings of air flow in room regulator
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Indicate which supply diffusers that affects the exhaust damper
This is done by:
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Installing a motorized plenum box that can handle high pressure with low sound
Installing a suitable diffuser that can handle 0-100% airflow without the risk of draft
Making sure the pressure in the system is not exceeding 200 Pa
Measuring actual air flow regardless of pressure
Setting all parameters in displays on Regula units
Total air flow for supply diffusers is being added up and exhaust air flow is regulated
The fan uses only necessary pressure for each diffuser
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Constant pressure solution
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Active diffusers
Constant pressure
Measuring for exhaust
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Active boxes
Variable pressure
Calculation for exhaust
Pascal
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Pascal components
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Pascal components
Diffusers
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Suitable diffusers for 0-100% airflow
LCP
LKP
LCC
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Diffusers with integrated presence sensor
for Demand control
LCP-P
LKP-P
LCC-P
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No draft risk with suitable diffuser
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Pascal components
MBBV
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Standard MBB box with integrated actuator
Volume flow regulation with flow measurement in box
Correct airflow independent of pressure
No minimum limit – can regulate 0-100%
Can handle up to 200 Pa with low sound level
Characteristic curves pre-programmed for each size
Translates a voltage to an airflow
Indicates damper position by a voltage signal
Demounting of damper is possible
7 sizes available
MBBV is delivered with 0-100% settings
(never set actual airflows in MBBV, since Regula Combi
will adjust the signal according to flow)
Regula Connect VAV integrated
Plugin play solution for easy wiring
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Pascal components
VRU-2
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With new sensor technology from Belimo
Used for regulation of exhaust air
Controlled by Regula Combi with special exhaust program
Indicates damper position to Regula Combi
Can be used for supply as alternative to MBBV boxes, typically used in rooms with
multiple diffusers
Requires straight duct in front the unit
Requires silencer after the unit
In a Pascal system VRU is delivered with 0-100% settings
(never set airflows in VRU, since Regula Combi will adjust the signal according to flow)
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Pascal components
Regula Combi
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Special designed VAV program (program 6)
Special designed exhaust program (program 7)
Display and pushbuttons
Exoline communication
Flexible setup – adjustable parameters
Regulation of temperature in sequence; heating and cooling
Output signal for flow 2-10 V – 0 V closes damper
CO2 overrules temperature regulation resulting in higher airflows
Air volumes for standby (unoccupied), min. occupied and max occupied can be set
Transforms damper position to Exoline communication
Transforms exhaust damper signal from Exoline to 2-10 V (exhaust program)
All settings can be done with REGIO Tool
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Pascal components
Regula Master
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Standard hardware from Regin – known in the market
Special designed software for Pascal
One standard unit with three modes
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Three basic functions in the system
• Exhaust control
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Single Regula Master (SRM)
Local Regula Master (LRM)
Global Regula Master (GRM)
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Summary of supply air volumes which affect the exhaust damper
Summary of constant flows which affect the exhaust damper
Factor for more/less exhaust than supply
Fan optimizer
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Secures that the most open damper is open to 85%. If the damper is more open, accelerate the fan – if less slow down
Operating control
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Monitors damper behavior in the system
Gives alert if a damper does not move over time
All communication between Regula units with Exoline
Communication to overall BMS via Exoline or via an OPC solution (BMS contractor)
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Pascal overview
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Volume flow regulation /
variable pressure system
Suitable diffusers 0-100%
Room regulation with special
programs
Demand control
Exhaust control
Fan optimizer – on room level
Operating control
Exoline communication
Plug n’ play with Regula
Connect
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VAV study
Rehva Journal article October 2011 from Oslo University
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Problem: Energy consumption for fans in VAV systems
Solution 1 – standard pressure controlled system
Solution 2 – fan optimizer on zone dampers
Solution 3 – fan optimizer on room dampers/boxes
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Exhaust strategy
Central regulation and exhaust diffuser in rooms
Central regulation and overpressure valve in rooms
Room balanced exhaust with parallel signal
Room balanced with exhaust control in each room
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System layout
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Project Phases Pascal
Designing
Installing
Commissioning
Operating
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No special demands for
duct design
No pressure zones
Few standard
components
Easy selection of
components
Total system unchanged
when redesigning one
part
High accuracy in flow
and sound
Simple and safe
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Few components
Less dampers in the
system
No pressure
regulation
Components from
stock
Easy wiring
standardized with
Regula Connect
No labelling with
room ID needed
Configuration to be
done after
installation
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Adjustable parameters
Technical manual with
step-by-step guide
available
Settings can be done
directly in displays in
Regula Combi and
Regula Master
Possibility to use
Regio Tool
No IT expertise
needed
Can be done by
installer
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Operating control
Fan optimizer on room
level
Demand control – with 3
airflows for energy saving
Easy maintenance with
supply access points from
diffuser
Flexible for future changes
Additional diffusers – no
need for re-balancing
New room set-up can
easily be configurated
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Summary
Simple Design
Easy Construction
Low Energy consumption
Variable pressure system
Standard installation
Low fan pressure
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Plenum box with flow regulation to secure
correct airflow
No need for pressure regulation in duct
system
No need of dampers between fan and
diffuser
No special demands for duct design
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Flexible system layout
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No need for zoning
Plenum box with low sound even at high
pressure
Flexible diffusers that handles 0-100%
airflow
Can handle low airflows with new D3
sensor technology
No need for airflow measurement for
exhaust control
Extra diffusers can be added without rebalancing
Change of room set-up can be easily be
done
Few standard components
Less dampers and silencers
No settings from factory
No need for ID labeling products for each
room
Available from stock
Plug n´Play wiring with Regula Connect
All configuration to be done after
installation
Easy commissioning
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No balancing, only configuration
Configuration can be done by installer
Special Pascal programs in Regula
Combi
Adjustable parameters
Simple addition of supply to control
exhaust
All configuration can be done directly in
Regula units or Regio Tool
Exoline is an open Protocol
Step-by-step guide available
Communication with overall BMS is
possible
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Lower pressure drop due to variable airflows
Fan optimizer to secure only necessary fan
pressure
Fan optimizer on room level
Low pressure drop in MBBV box
Demand control
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Integrated presence sensor in diffuser
Low standby airflow at non-occupancy in room
CO2 control possible
Lower airflows means lower energy
consumption for cooling
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