Renewable energy options for leisure centres

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Renewable energy options for leisure centres

  1. 1. Renewable Energy Options for Leisure Centres Michael Bell Tipperary Energy Agency 3rd October 2013
  2. 2. • Which Renewable Energy Option • Renewable Energy from Biomass • Biomass Introduced • Supply Chain • Project Management Cycle for Biomass Heat Supply • Specification of Systems • Contract Options • Case Studies of Completed Biomass Project in Leisure Centre • Key Considerations with Biomass • Renewable Heat from Heat Pumps • Other Renewable Energy Options Introduction
  3. 3. • Every site is unique, however there are some common energy patterns Which Renewable Energy Option? - 500 1,000 1,500 2,000 2,500 Nenagh Thurles EnergyConsumption(MWh) Electrical (MWh) Thermal (MWh) • 75% Thermal Energy Consumption & 61% cost (Average) • Therefore target thermal renewable energy 1st (After Energy Efficiency)
  4. 4. • Thermal Energy from Renewable Energy Sources • Biomass • Wood Chip • Wood Pellet • Heat Pump • Solar Thermal • CHP • Biomass has been the logical choice in Tipperary (off gas) • Lowest Cost • Proven Technology • Typically the space is available • Suited to retrofitting to high temperature systems Which Renewable Energy Option?
  5. 5. • Two fuels: • Wood Chip and Wood Pellet • Common Source Introduction to Biomass Renewable Energy from Biomass Wood Chip Wood Pellet Chip (35% MC) Pellet (8%MC) kWh/tonne 3200 4800 €/tonne 125 230
  6. 6. Supply Chain
  7. 7. Partnerships to Supply Heat • Local wood energy businesses – adopting partnerships
  8. 8. • Feasibility Study & Supply Chain evaluation • Project Specification • Project Contract Structuring • Project Procurement • ITT Documentation • Tender award criteria • Evaluation • Develop & Set Contract • Project Implementation on site • QA/QC! • Contract management until heat supply has finished • Procure heat supply contract for further period Project Management Cycle for Biomass Heat Supply
  9. 9. • Biomass = several interlinked systems in one • Expert skills required to fully integrate • Correct structuring of contract is key to success • Integrate supply of heat where possible to one point of responsibility • Outline specification required for procurement stage when going for heat supply • Risk assessment Specification of Systems
  10. 10. • Thermal Store Size & Location Specification of Systems • Boiler Type Size & Location • Fuel Delivery size & Type & supply chain evaluation • Fuel Store & Delivery size & Type
  11. 11. Biomass Contract Options • Separate Contracts for • Design • Supply • Install • Operate & Maintain • Supply of Fuel OR • Contract to Supply, Install and supply all heat for period of 3 to 5 years, with subsequent contract options after initial heat supply contract finishes (Customer pays capital) OR • Contract to Supply, Install and supply all heat for period of 3 to 5 years, with subsequent contract options after initial heat supply contract finishes (ESCO pays capital) OR ….. Etc • Each situation is unique and should be evaluated on its own merits
  12. 12. Nenagh Biomass Boiler Summary Heat load in kWh 900,000 Biomass cost €42,903 Equivalent oil cost @80c/ litre €91,043 Saving €48,140 Capital Cost €203,165 SERVE EU Grant €80,000 CO2 Saving in Tonnes 207
  13. 13. Nenagh Biomass Boiler With SERVE EU Grant Aid Simple Payback in Years 2.6 10 Yr NPV €367,000 10 Yr IRR 69% Without Grant Aid Simple Payback in Years 4.2 10 Yr NPV €290,035 10 Yr IRR 32% Key Innovation • Contracts • Design Build Operate Contract • Contractor pays for all oil, maintenance, chip etc. • Single heat supply contract fixed at 4.2c/kWh for 3 years • All losses, breakdowns covered by contractor • Chip supplied locally.
  14. 14. Thurles Biomass Boiler Summary Heat load in kWh (Reducing) 1,500,000 Biomass cost €47,000 Equivalent LPG cost @55c/litre €115,000 Saving €68,000 Capital Cost €160,000 DoTTS Grant €135,000 CO2 Saving in Tonnes 400
  15. 15. Thurles Biomass Boiler With DoTTS Grant Aid Simple Payback in Months 6 10 Yr NPV €496,000 10 Yr IRR 194% Without Grant Aid Simple Payback in Months 30 10 Yr NPV €377,035 10 Yr IRR 59%
  16. 16. Key Considerations with Biomass • Boiler integration with existing system • Boiler, pipework & buffer & fuel store sizing • Pump Control • Building Energy Management System • Operation and Maintenance • Ensure competent personnel • Supply of fuel • Asses availability of fuel and level of competition in local market (Wood chip has a local 50km delivery radius) • Fuel quality • Fuel Delivery systems and stores • Ensure systems can accept deliveries from all suppliers in region • Contract structuring • Ensure appropriate clauses are covered and structured in contract to cover all parties and enable a long-term sustainable supply of heat (economically & environmentally) Proper project scoping, specific ation, procureme nt, contract & implementation will ensure success
  17. 17. Renewable Heat from Heat Pumps • Heat Pumps (HP) are suited to low thermal differential situations • EG: Pool water heating 29 Celsius is an ideal temperature for HP to supply at • Heat Pumps can be either air source or ground source • Coefficient of Performance (COP) depends on how well sized and integrated the HP is • Fesible to supply large portion of Leisure Centre heat load with HP Economics (simplified): • Unit of Electricity = 0.15 €/kWh • Seasonal COP = 3 (est) , thus heat price = 0.05 €/kWh • Unit of Oil = 0.1€/kWh • Efficiency = 85%, thus heat price = 0.11 €/kWh • 55% saving heat pump vs oil (conservative)
  18. 18. Ballina Swimming Pool Case Study • Open 4 months per annum (summer) • Outdoor pool, previously unheated & unused • Solution required to be • Low maintenance • Robust • Suited to leaving switched off over winter • Low operational cost • Achieve pool temperature of 24 Celsius • Options Considered • Cover • Solar • Biomass • Heat Pump (chosen)
  19. 19. Ballina Swimming Pool Case Study • 2 x 22kW heat pumps to heat pool Include heat exchanger • 1 x 9kW heat pump to heat DHW • 1 x 500l DHW tank • Aerated shower heads • CAPEX = €48,000 ex VAT • Contract structured at procurement stage to include 5 year maintenance • Annual maintenance is not onerous • Payback N/A (70% less than oil as system operated during summer with high air & pool temperature) (COP of 4.5)
  20. 20. Other Renewable Energy Options • Thermal • CHP – (Only in Natural Gas areas) • Should always be sized to meet les than peak electrical demand & should be controlled to never dump heat. • Note also maintenance agreements – look for performance & output based contracts – not run hours • Solar thermal • Electrical • Wind • CHP • Solar Photovoltaic
  21. 21. Other Renewable Energy Options • Wind • Payback 5 to 20 years (lots of variables) • Two in operation (at leisure centres) • Some Considerations • Land Registry & Planning Application Searches • Local authority zoning & development plans • Planning & legislative constraints • Wind speed data • Location & selection of wind turbine • Energy & C02 emissions savings • Cost benefit analysis • Site Access • Grid Connection • Social Acceptance
  22. 22. Other Renewable Energy Options • Solar Photovoltaic • Cost • Becoming feasible
  23. 23. Contacts Tipperary Energy Agency Craft Granary Church St Cahir, Co. Tipperary Michael Bell Senior Energy Engineer T: 052 74 43090 F: 052 74 43012 E: mbell@tea.ie W: www.tea.ie Thank you.

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