Présentation de Mirom

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Présentation de Mirom

  1. 1. EXPERIENCES WITH AN ORC TO INCREASE THE ENERGY EFFICIENCY IN A MUNICIPAL WASTE INCINERATOR Jeroen Vanwalleghem1 2-4-2012
  2. 2. Summary  The waste incinerator of MIROM.  Extension of the heat recovery with electricity.  The organic rankine cycle.  Application in MIROM Roeselare.  Some data, graphs and results.  Calculation of expenses.  Conclusion and future.2 2-4-2012
  3. 3. MIROM Roeselare  Is a union of 15 municipalities established for collecting and treating municipal waste. The region counts 270.000 inhabitants.  The waste is collected separately: residual waste, paper, PMD (plastic and metal cans, bricks).  20 recycling parks.  Own waste incinerator – only residual waste.3 2-4-2012
  4. 4. The waste incinerator of MIROM  Two lines, each with a furnace, boiler, ESP, dry gascleaning with injection of bicar and active coal. Baghouse with Remedia catalytic filters and a shell denox system.  2 * 4 ton/h or 62.000 ton/year.  Boilers with superheated water of 180 C. 2 * 7 MW or 115.000 MWh/y.  Since 2010 extra Economizers: 2 * 0,75 MW4 2-4-2012
  5. 5. 110 C 1986 2004 18MW-180 C 1976 2008 180 CGas : 7MW 3,1MWe 5 5 2-4-2012
  6. 6. Heat recovery  Primary circuit of 180 C, pression 15 bar and heat exchanger.  Town heating system of 110 C, 5 bar.  21 customers with a heat demand around 25.000 MWh.  5.000 MWh for preheating of combustion air.  Expansion of the distance heating is not possible. Forced to look for other systems to increase energy recovery.6 2-4-2012
  7. 7. 7 2-4-2012
  8. 8. District heating • Circuit to city centre: 4,5 km(x2) MIROM • Circuit to greenhouses: 2,5 km(x2) • 21 customers8
  9. 9. Choice for electricity  MIROM did not find other customers who needed lots of energy.  Production of electricity was the only option.  Primary temperature of 180 C is far too low to make electricity with steam.9 2-4-2012
  10. 10. Why did MIROM choose an ORC  Boilers are still in perfect condition.  The town heating system stays primary, so energy to ORC will fluctuate.  ORC is easily adjustable.  Organic fluid evaporates at low temperature.10 2-4-2012
  11. 11. Property of solkatherm  Looks like water, smells like solvent.  Heavier than water: 1,36 kg/l.  Boils at 35,6 C.  Not toxic.  Not explosive or flammable.  Self-ignition temp.: 580 C.11 2-4-2012
  12. 12. 12 2-4-2012
  13. 13. 13 2-4-2012
  14. 14. 14 2-4-2012
  15. 15. Some data  Installed: input = 17 MWth, output = 3,1MWe.  Design conditions: input 15 MW, T amb. 15 C gives output 2,4 MWe.  Average efficiency: 15,6%.  Range: 2.900 kW – 100 kW.15 2-4-2012
  16. 16. Investment in EUR  ORC: 5.300.000  Heat connection: 725.000  Building: 900.000  Total: 6.925.00016 2-4-2012
  17. 17. Heat recovery in 2011 in MWh Produc- Town Preheat Energy Produ- Total tion heating Prim. to ORC ced Recov. boilers Air electr. MWhth MWhth MWhth MWhth Mwhe MWh 142.525 24.100 5.200 107.000 16.930 46.23017 2-4-2012
  18. 18. Production of electricity  See next slide.  ORC runs since july 2008.  Even in winter there is still production.18 2-4-2012
  19. 19. Electricity - BOUGHT [MWh] Energy balance 08 - 09 Electricity - SOLD [MWh]MWh/month Total Electricity Production [MWh] Own consumption [MWh] 1800 1600 1400 1200 1000 800 600 400 200 019 jan feb mar apr may jun jul aug sep oct nov 2-4-2012 dec jan feb mar apr may jun jul aug sep oct nov dec
  20. 20. Aankoop - Totaal 195 MWh Balans elektriciteit 2011 Verkoop - Totaal 8814 MWhMWh/maand Productie - Totaal 16930 MWh Eigen verbruik - Totaal 8325 MWh 1800 1600 1400 1200 1000 800 600 400 200 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec20 2-4-2012
  21. 21. Electricity - BOUGHT [kW]kW Power 08 - 09 Electricity - SOLD [kW] Total Electricity Production [MWh]2500240023002200210020001900180017001600150014001300120011001000 900 800 700 600 500 400 300 200 100 0 21 2-4-2012
  22. 22. Gemiddelde Injectie actief vermogenkW Vermogens Gemiddelde Afname actief vermogen 2011 Gemiddeld opgewekt vermogen ORC Eigen verbruik2500240023002200210020001900180017001600150014001300120011001000 900 800 700 600 500 400 300 200 100 022 2-4-2012
  23. 23. Efficiency  ORC follows thermal load between full range  Guaranteed average gross efficiency = 15,6%  Gross efficiency varies between 15% and 17% depending on outside temperature conditions and thermal load23 2-4-2012
  24. 24. 24 2-4-2012
  25. 25. Reliability - Availability  Total amount of running hours during 2011 8364 hours (total availibility = 95,5%)  Total amount of running hours incinerators : 8396 hours25 2-4-2012
  26. 26. Conclusion.  An ORC is a real added value for our heat recovery.  Even in winter we still have production of electricity.  Thanks to the GEC, the system is profitable.  After the typical start-up problems, the ORC runs smoothly with high availibility  Little supervision necessary26 2-4-2012
  27. 27. Future  There is a plan to build greenhouses of about 200.000 m² next to our ORC. We’ll use the cooling system to warm up the greenhouses.  There are plans to enlarge the town heating system: Up to 30 more industrial clients and 50 residential clients. In this case, efficiency will decrease by a certain percentage, but the total recovery of energy will be very important.27 4/2/2012

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