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Trigeneration Case Study

Trigeneration Case Study. Energy Context. Complex issues …. No consensus on solution …. Slow and ineffective response …. Ireland yet to take leadership role …. Where to Focus?. Energy White Paper:. All-Island Market. Wind/biomass. Corrib. Instruments:. Carbon Tax?. Market De-Reg.

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Trigeneration Case Study

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  1. Trigeneration Case Study

  2. Energy Context • Complex issues …. • No consensus on solution …. • Slow and ineffective response …. • Ireland yet to take leadership role ….

  3. Where to Focus? Energy White Paper: All-Island Market Wind/biomass Corrib Instruments: Carbon Tax? Market De-Reg Interconnection Energy Efficiency Action Plan • Adoption of new technologies – prime the market • Energy Efficiency • Control of spiralling costs CHP/Trigeneration Implementation Focus:

  4. Theroetical Impact CHP / Trigeneration Trigeneration CHP Trigeneration has the potential to address the major stationary energy sectors in Ireland

  5. Actual CHP Potential CHP Penetration EU25 Ireland Ireland 4% Penetration → EU Average 10% Penetration

  6. Why CHP / Trigeneration CHP CCGT Thermal

  7. What is CHP? Simultaneous production of heat and power

  8. What is Absorption Cooling? • Uses "thermal" compressor (consisting of the generator, absorber, pump and heat exchanger) to boil water vapor (refrigerant) out of a lithium bromide/water solution 38.3°C 38.3 38.3 43.8°C 77.7°C 115.5°C 77.7°C 99.4°C 34.4°C 6.6°C 12.2°C 52.2°C 5°C 29.4°C 37.7°C

  9. What is Trigeneration? Classical solution Natural Gas 7.8 GWh Site boilers Efficiency = 90% LCV HEAT DEMAND 7 GWh Typical office building (800,000sq feet) with IT rooms to be cooled COOLING DEMAND 8 GWh Site Chillers COP = 3.33 Power 16.4 GWh 2.4GWh POWER DEMAND OTHERS 14 GWh 14GWh Natural gas in LCV

  10. What is Trigeneration? Natural Gas 3.56 GWh Site boilers Efficiency = 90% LCV HEAT DEMAND 7 GWh Trigeneration ABO COP = 0.7 CHP power = 38.8% CHP heat = 42.7% 3.2GWh 3.8GWh Natural Gas 20.6 GWh COOLING DEMAND 8 GWh Site Chillers COP = 3.33 Power 7.35 GWh 3.5GWh 4.5GWh 1.35GWh POWER DEMAND OTHERS 14 GWh 8GWh 6GWh Cost Savings = 16% (O&M cost included) Payback period below 5 years CO2 annual savings = 3,400 tons Natural gas in LCV

  11. Support Scheme in Ireland • Support program run by Sustainable Energy Ireland • Objectives: • Demployment of small-scale CHP • Energy and carbon emission savings • Customer awareness and confidence in CHP • Capability of the Irish CHP equipment supply chain • €11m allocated for CHPs • CHP range = 50kWe to 1MWe • Time scale 2006 – 2010 • Grants - 40% for qualifying feasibility studies; 30% capital support

  12. Trigeneration Case Study • Allied Irish Banks a. One of the 2 major banks for Ireland b. Dalkia customer for Facility Management c. Major Expansion of the Head office Ballsbridge Dublin 4

  13. AIB Project Background • Extension project (started in 2005) a. Extension from 450,000 sq ft to 900,000 sq ft b. New Energy Centre to provide 1. Power for the site (CHP) 2. Heat for the site (CHP + boilers) 3. Cooling for the extension (absorption chiller + liquid chiller) 4. Power backup (EDG + CHP) for the site c. Requirements

  14. AIB Dalkia Solution • Design: Front-end & Detailed design both Mechanical/Electrical Dalkia Scope, Support to the AIB consultant for the Power Back up strategy • Build: construction of the plant managed by Dalkia • Finance: financing for the capital expenditure • Operation and Maintenance of the plant

  15. AIB Project Phasing • First contact Aug. 2004 • Tender submitted : 1.6 x 2 MW Dec. 04 • Dalkia as unique supplier on new basis May 05 • CHP plant re-design: 1 x 1 MW June 05 • Negotiations on agreement July/Dec. 05 • Agreement signed Jan. 06 • Project start Jan. 06 • Plant Operation May. 07

  16. AIB Technical Overview • Technical scope • 1MW CHP unit: Jenbacher Engine JMS320-GS-NL package • Step-up transformer 0.4/10 kV • 0.73 MW single effect Absorption chiller: York YIAC5C3 • Pipework / control & instrumentation • Pumps / pressurisation units • 4 Plate heat exchangers • Metering (gas, power, heat, cooling) • By others • Cooling tower, utilities to trigeneration plant • Energy distribution to final usages

  17. AIB Operation and Design Philosophy

  18. AIB Schematic Step up transformer Main distribution board Gas PHE New building 1.2MW JMS 320 CHP Hot Water loop – new building PHE Existing building 1.2MW Hot Water loop – existing building CHP protection ABO 730kW Chilled Water loop – new building Cooling Tower network

  19. AIB Contractual Agreement Energy: • Dalkia procure natural gas for the entire site. • The gas for the CHP is at Dalkia cost. • The balance of plant of gas (kitchen, boilers) invoiced at pass-through cost. • The power, heat and cooling generated by the trigeneration are metered and invoiced as per contract. Operate and Maintenance • Dalkia guarantee the availability of the plant: 92% minimum. • Dalkia guarantee the performances. Power output 1065 kW. Heat output 1,200kW • Dalkia guarantee the equipment : Replacement Guarantee Service. • Penalties for Dalkia if performances and availability not achieved • Equipment to be replaced at Dalkia cost over the duration of the contract. Finance • The asset is financed by Dalkia

  20. AIB Conclusion • Benefits to AIB • Gas procurement at reduced cost. • Energy Savings. • Transfer of responsibility for the performances of the plant to Dalkia over the duration of the contract : 15 years. • Fixed fee for O&M

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