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

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

2. Constant pressure solution • Solution 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

3. 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

4. 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) • Correct pressure = correct airflow • Higher pressure = higher airflow • Lower pressure = lower airflow

5. 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

6. Vision • Our 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

7. Constant pressure solution • Active diffusers • Constant pressure • Measuring for exhaust • Pascal • Active boxes • Variable pressure • Calculation for exhaust

8. Pascal components

9. Pascal components • Diffusers • Suitable diffusers for 0-100% airflow • LCP • LKP • LCC • Diffusers with integrated presence sensor for Demand control • LCP-P • LKP-P • LCC-P • No draft risk with suitable diffuser

10. Pascal components • MBBV • 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

11. 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)

12. 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

13. Pascal components • Regula 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)

14. 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

15. VAV study • Rehva 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

16. 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

17. System layout

18. Project Phases Pascal • Designing • 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

19. Summary • Simple 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 consumption • Low 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