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Lindab Pascal - Simplified VAV solution with full potential...

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Constant pressure solutionSolution based on constant pressure regulation

• 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 solutionExhaust balance with flow measurement – master/slave function

Measuring unit has a minimum flow rate limitMeasuring unit requires straight duct before the unitAddition of several supply to control one exhaust is difficultFRU/VRU settings must be done special from factoryExtra components for flow measurement

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Constant pressure solutionActive diffusers

Diffusers with high impulse even at low airflowsDiffuser settings must be done individually from factoryNot possible to put on stockLabelling with ID must be done for each roomAirflow settings are based on theoretical calculated pressure (no airflow regulation)• Correct pressure = correct airflow• Higher pressure = higher airflow• Lower pressure = lower airflow

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Constant pressure solutionPressure regulation

Areas with constant flow balanced with simple balancing damperLimited pressure allowance in diffuserSize of pressure zone not to bigDifficult keeping constant pressure in all parts of a zoneHigh demand on duct designLimited flexibility when reconstructedExact placement of pressure sensorHigher energy consumption due to higher minimum pressureFan optimizer only on zone dampersExtra components for pressure regulation

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VisionOur vision is:

• Install a standard VAV system with room temperature regulation

• Make settings of air flow in room regulator

• Indicate which supply diffusers that affects the exhaust damper

This is done by:

• 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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• Active boxes• Variable pressure• Calculation for exhaust

• Active diffusers• Constant pressure• Measuring for exhaust

Constant pressure solution

Pascal

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Pascal components

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Pascal componentsDiffusers

• Suitable diffusers for 0-100% airflow

LCPLKPLCC

• Diffusers with integrated presence sensor for Demand control

LCP-PLKP-PLCC-P

• No draft risk with suitable diffuser

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Pascal componentsMBBV

• 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

• 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

• 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 componentsRegula Master

• Standard hardware from Regin – known in the market• Special designed software for Pascal• One standard unit with three modes

• Single Regula Master (SRM)• Local Regula Master (LRM)• Global Regula Master (GRM)

• Three basic functions in the system• Exhaust control

• 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• 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• 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• 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 studyRehva Journal article October 2011 from Oslo University

• 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 strategyCentral 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 PascalDesigning

• 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

Installing

• 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

Commissioning

• 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

Operating

• 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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SummarySimple Design Variable pressure system• 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 Flexible system layout• 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 re-

balancing• Change of room set-up can be easily be

done

Easy Construction Standard installation• 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• 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

Low Energy consumptionLow fan pressure• 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• Integrated presence sensor in diffuser• Low standby airflow at non-occupancy in room• CO2 control possible• Lower airflows means lower energy

consumption for cooling

lindab | group presentation