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Local Biogas Grids - improving the economics of biogas plants

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Presentation on options to efficiently use biogas heat; held at Oldenburger Gastage 2010

Presentation on options to efficiently use biogas heat; held at Oldenburger Gastage 2010

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  • 1. SERVICE MIT ENERGIE. Development of local biogas grids in Germany Oldenburger Gastage, 1. Dezember 2010© KWA EVIVA GMBH 2010 VOGELSANGER STRASSE 250 I 50825 KÖLN I GERMANY
  • 2. SERVICE MIT ENERGIE. Development of local biogas grids in Germany Oldenburger Gastage, 1. Dezember 2010© KWA EVIVA GMBH 2010 VOGELSANGER STRASSE 250 I 50825 KÖLN I GERMANY
  • 3. SERVICE MIT ENERGIE. Content Biogas in Germany Motivation for local biogas grids Best-practice examples Outlook© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 4. SERVICE MIT ENERGIE. Biogas plants in Germany Amount of newly built plants Total amount in previous year Average size of plant (kWel.) Additional capacity (MWel) Installed capacity (MWel) Electrical capacity Amount Source: German Biogas Association© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 5. SERVICE MIT ENERGIE. Agricultural Biogas Plants Source: KWA Eviva GmbH Source: KWA Contracting AG
  • 6. SERVICE MIT ENERGIE. Industrial Biogas Plants Desulphurisation CHP-plant + Thermal Digestion stack treatment Storage tank Source: BioWerk Hamburg BGP WTE Soccer Stadium Fat tank Source: BioWerk Hamburg Bio filter Hydrolysis Heat exchanger Treatment hall Transformer station Source: HSV© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 7. SERVICE MIT ENERGIE. Market Development in Germany More than 1,000 enterprises working in the sector About 5000 biogas plants in operation Technologies for upgrading to biomethane (23 projects) and biogas as transport fuel (2 projects) Technologies for efficient use of thermal energy Advanced technologies for treatment of digestate and its application as fertilizer© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 8. SERVICE MIT ENERGIE. Feedstock for Biogasproduction in Germany Source: IBBK
  • 9. SERVICE MIT ENERGIE. Overview on biogas utilisation applications Slightly pre-treated biogas Combustion in CHP s for electricity, heat and cold generation Flare (only back-up) Upgrading to natural gas quality Feeding into the natural gas grid Vehicle fuel© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 10. SERVICE MIT ENERGIE. Combined Heat and Power (CHP) Source: Econcern Application in Co-generation units for electricity, heat and cold production© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 11. SERVICE MIT ENERGIE. Co-gen unit with district heating grid© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 12. SERVICE MIT ENERGIE. Upgraded Biogas Source: Deutsches BiomasseForschungsZentrum gGmbH / Econcern Upgrading and injection into natural gas grid or utilisation as vehicle fuel© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 13. SERVICE MIT ENERGIE. Why biogas grids?© KWA EVIVA GMBH 2010 VOGELSANGER STRASSE 250 I 50825 KÖLN I GERMANY
  • 14. SERVICE MIT ENERGIE. Motivation >5000 biogas plants with 2200 MWe installed electrical capacity in Germany à ~2300 MWth capacity potential Current degree of heat utilisation: ~50%, often only to a small degree and/or to heat some buildings Using the heat Increased degree of utilisation improved economics Relating the heat sales price to market prices of fossile energy carriers à Improved hedging of economic risks Fixed EEG-tarifs + market volatile heat revenues à hedging of substrate market prices© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 15. SERVICE MIT ENERGIE. Biogas and efficient resource utilisation Prime energy: biogas à 6 kWh/Nm3 Biogas in co-gen unit à2,5 kWhe per Nm3 of biogas used + 2,4 kWhth per Nm3 of biogas used but how to use the heat?© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 16. SERVICE MIT ENERGIE. Heat usage options Heating of buildings Heat supply via district heating grids Drying systems Heating greenhouses Cold supply to cooling applications Heat supply to large cleaning businesses Process heat for (e.g.) Food industry processes biogas pipelines and satellite CHP units© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 17. NahwärmenetzSERVICE MIT ENERGIE. Co-gen unit with biogas pipeline© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 18. SERVICE MIT ENERGIE. Solution: local biogas grids less thermal losses more economic for small/medium size biogas plants (<1000 kWe) when heat off-take can be increased significantly and distances <3 km Biogas grid costs 1/3 compared to heating grid Additional costs for compressor and auxiliary material Operational costs higher Versatile: possibility to connect more biogas plants on one biogas pipeline Safety important Pipeline must be errected und operated according to DVGW-rules Construction by DVGW-enterprises Operation with 24 h availability DVGW materials (PE)© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 19. SERVICE MIT ENERGIE. Best-practice examples in Germany© KWA EVIVA GMBH 2010 VOGELSANGER STRASSE 250 I 50825 KÖLN I GERMANY
  • 20. SERVICE MIT ENERGIE. Germany s 1st Biogas grid Braunschweig/Lower Saxony, 2007 Biogas CHP unit 500 kWe Biogasleitung 20km satellite-CHP units 2 x 1 MW e Heat injection into district heating grid of the local utilityof BS Energy (16 Mio kWh/a) Details Under large canal under motorway Savings: 7200 t CO2/a Source: Abwasserverband Braunschweig© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 21. SERVICE MIT ENERGIE. Biogas grid Braunschweig - ecocnomics Investment costs Biogas plant: 6.6 Mio. Biogas pipeline + CHP unit: 4.8 Mio. Annual costs O&M: 560 k /a Substrate: ~1.04 Mio. /a Financing: 645 k /a Revenues Heat & electricity: 2,62 Mio, /a P&L: + 375 k /a© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 22. SERVICE MIT ENERGIE. Biogasgrid Schwäbisch Hall/Baden- Württemberg, 2010 Biogas CHP unit 100 kWe, 120 kW th Biogasleitung 7km Satellite-CHP unit 300 kWe, 330 kW th Heat injection into district heating Source: Energiepflanzen, 4/2010 grid of the local utilityof Schwäbisch Hall Savings: 2.500 t CO2/a© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 23. SERVICE MIT ENERGIE. Biogas grid Bad Bevensen/Lower Saxony, 2010 Biogas pipeline 5,5 km satellite-CHP unit 600 kWe Heat utilisation by public thermal baths (4 Mio kWh/a) Heat off-take contract to be always cheape than heat from gas/oil Details Under little river Savings 400000 l/a fueloil 2700 t CO2/a Source: KWA Contracting AG© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 24. SERVICE MIT ENERGIE. Ins & outs External heat supply for fermenter necessary Safety regulations for gas grids (e.g. 24h support) Often additional CHP unit needed Versatile connect several biogas plants to one grid Q: Selling biogas or electricity and heat?© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 25. SERVICE MIT ENERGIE. Summary and Conclusions Many biogas plants utilise the available heat insufficiently Large economic potential to make use of waste heat from CHP units EEG and prices of fossile energy carriers call for biogas heat solutions Biogas grids can be an economically attractive option to increase the degree of utilisation of the energy content of biogas with less haet losses compared to heating grids© KWA EVIVA GMBH 2010 Eviva nachhaltige Energiedienstleistungen
  • 26. SERVICE MIT ENERGIE. Questions? Frank Schillig e: f.schillig@eviva-energy.com t: +49-221-78946910 w: www.eviva-energie.de Eviva Strives for a Proper and Straight Support of Your Sustainable Energy Supply© KWA EVIVA GMBH 2010 VOGELSANGER STRASSE 250 I 50825 KÖLN I GERMANY