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Energy Savings with Water Based Systems

Energy Savings with Water Based Systems. By Maija Virta Specialist of Indoor Environment Technology. Annual energy consumption of the systems. From Office to Meeting Room. Case Study of an Office Building in Paris. Office rooms. 10 floors 11.082 m 2 total area 31.300 m 3 total volume

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Energy Savings with Water Based Systems

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  1. Energy Savingswith Water Based Systems By Maija Virta Specialist of Indoor Environment Technology Energy in Focus

  2. Energy in Focus

  3. Annual energy consumption of the systems Energy in Focus

  4. From Office to Meeting Room Energy in Focus

  5. Case Study of an Office Building in Paris Office rooms 10 floors 11.082 m2 total area 31.300 m3 total volume Landscape office 74 % Office rooms 26 % Meeting rooms 15 % Other 8 % Open landscape offices Meeting rooms Open landscape offices Office rooms Energy in Focus

  6. Summary of Building and System Design Energy in Focus

  7. Chilled Beam System Dedicated outdoor air system with heat recovery from exhaust air Ventilation using constant airflow in offices and in meeting/team/project rooms Room temperature control Active chilled beams for both cooling and heating Gas boiler plant One chiller with air-cooled condensers. Energy in Focus

  8. Internal loads Energy in Focus

  9. Results:Total Delivered Energy Consumption Energy in Focus

  10. Total Energy Consumption Energy in Focus

  11. Delivered and Primary Energy Consumption Primary energy 175,4 kWh/m2,a (Primary energy factors: Gas 1 , Electricity 2,5) HVAC + lights: 125,9 kWh/m2,a Delivered energy 77,7 kWh/m2,a HVAC + lights: 48,9 kWh/m2,a Energy in Focus

  12. Improved Annual Primary Energy Efficiency: 126 kWh/m2 => 50 kWh/m2 => 0 kWh/m2 ??? Better insulation? • 2. Ventilation (39 kWh/m2): • Demand based ventilation in offices • Reduced primary air volume (very low polluting materials) • Chiller COP • Hybrid ventilation • Improved heat-recovery • Free cooling of water • 1. Lighting (74 kWh/m2): • Efficiency 12 -> 9 -> 6 W/m2 • Control (occupancy, day light) • Utilisation of day light • 3. Energy production • Low and zero carbon energy sources Energy in Focus

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