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Gutleutmatten - BadenovaWärmeplus

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Alexander Ripka
Axel Oliva
Local Renewables Conference 2018

Published in: Environment
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Gutleutmatten - BadenovaWärmeplus

  1. 1. Solar Thermal District Heating Freiburg-Gutleutmatten Alexander Ripka Axel Oliva Local Renewables 2018 Freiburg i.Br. 25.10.2018
  2. 2. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018  Project Partners  Concept of Heating Supply  Efficient Management Strategies  Résumé  Study Visit 1 Agenda
  3. 3. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 2 Project Partners City of Freiburg i. Br.  Development and administration Fraunhofer Institute for Solar Energy Systems  Research and support badenovaWÄRMEPLUS GmbH & Co. KG  Planning, building and operating
  4. 4. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018  Project Partners  Concept of Heating Supply  Efficient Management Strategies  Résumé  Study Visit 3 Agenda
  5. 5. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Motivation  Competition of Solar Thermal (ST), combined heat and power (CHP) and photovoltaics (PV)  No space for central ST collector fields or large thermal energy storage in urban area  Heat losses of district heating in range of 30 % during summer  High PV share displaces CHP electricity in summer and leads to uneconomical operation of CHP  Power grid interaction of CHP is gaining importance Pilot Scheme Freiburg-Gutleutmatten Decentralized Solar Thermal Energy and CHP in an Urban Area Longer phases with self-sufficient heat supply in summer Grid-friendly operation of CHP (decentralized storage) Operation of CHP according to electricity market Intelligent operation of district heating Solution Decentralized integration of ST energy
  6. 6. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 5 1. Solar Thermal energy  Decentralized solar thermal systems on every building  Decentralized heat storage in the buildings 2. District heating  Connection to a existing district heating network  Heating station with bio-methane CHP and natural gas boilers 3. Implementation  Connection obligation for all acquirers through the city of Freiburg  badenovaWÄRMEPLUS builds and operates all facilities including solar thermal energy CO2 emissions reduced by > 80% compared to decentral supply  Solar "full supply" during the summer months  "Shutdown" of the district heating network in the summer  Surplus heat is injected into the grid to supply other buildings Realization
  7. 7. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Building Area Freiburg-Gutleutmatten 6  Base area 8,2 ha  Number of buildings 38 (3 ... 9 floors)  Heated floor space 40.000 m²  Residential units 525 (1 ... 42 per building)  Construction standard KfW55 (55 % of legal limit)  Heating load 5 … 120 kW 38 heat generation plants:  Collector area 2.200 m² (8 … 179 m²)  Buffer tanks 160 m³ (0,8 … 12 m³)  Connected load 1.400 kW  District heating track length 1.540 m  Temperatures fwd/ret 75/40 °C  Heat demand 2.200 MWh/a  Solar yield > 600 MWh/a (> 25 %)  Heat losses (network) 300 MWh/a (target: 200 MWh/a)  Normal operation with "shutdown" of the district heating network expected in summer of 2
  8. 8. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Development Plan Gutleutmatten (2014) 7
  9. 9. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Collector Systems 8 Flat roofs Green roofs (rainwater retention) Top of collector max. 1,50 m above building height within a distance of 1,50 m of the edge South deviation 31 ° to SW Specifications of the development plan Gutleutmatten-West Gutleutmatten-Ost
  10. 10. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Costs 9 Investment  Collector systems, heating stations, storage 1.900 k€  Heating network 800 k€  Additional costs and miscellaneous 200 k€  Research and Development 350 k€ Total 3.250 k€ Subsidies  EnWiSol (federal government) 330 k€  Bafa/KfW (federal government) 440 k€  By Customers 1.490 k€ Total 2.260 k€ The heat costs are at a comparable level with other local heating areas in Freiburg Data net without VAT
  11. 11. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018  Project Partners  Concept of Heating Supply  Efficient Management Strategies  Résumé  Study Visit 10 Agenda
  12. 12. © Fraunhofer ISE 11 Operation Modes impulse
  13. 13. © Fraunhofer ISE 12 Operation Modes impulse
  14. 14. © Fraunhofer ISE 13 Operation Modes impulse
  15. 15. © Fraunhofer ISE 14 Operation Modes impulse
  16. 16. © Fraunhofer ISE 15 Operation Modes impulse
  17. 17. © Fraunhofer ISE 16 Operation Modes impulse
  18. 18. © Fraunhofer ISE 17 Operation Modes Cooperative
  19. 19. © Fraunhofer ISE 18 Operation Modes Cooperative
  20. 20. © Fraunhofer ISE 19 Operation Modes Cooperative
  21. 21. © Fraunhofer ISE 20 Operation Modes Cooperative
  22. 22. © Fraunhofer ISE 21 Operation Modes Cooperative
  23. 23. © Fraunhofer ISE 22 Operation Modes Cooperative
  24. 24. © Fraunhofer ISE 23 Operation Modes Cooperative
  25. 25. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018  Project Partners  Concept of Heating Supply  Efficient Management Strategies  Résumé  Study Visit 24 Agenda
  26. 26. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Résumé 25  Reduction of heat distribution losses by 30 % by using decentralized ST  Intelligent heating network control essential  Unpopular connection obligation (especially for private customers)  Some stressful complaining customers  Unhappy customers who cannot realize their own ideas  Concept suitable for professional property developers and housing companies  1 “standard” scheme – 38 different plants  Hardly known and uncontrollable time schedule of the entire project  High effort for project management, coordination, construction management, quality assurance  The design of mid sized solar thermal systems is not really mature  Great potential for cost reduction and rationalization
  27. 27. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018  Project Partners  Concept of Heating Supply  Efficient Management Strategies  Résumé  Study Visit 26 Agenda
  28. 28. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Gutleutmatten 27
  29. 29. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Gutleutmatten 28
  30. 30. © Fraunhofer ISE 29 Vielen Dank für Ihre Aufmerksamkeit! Alexander Ripka alexander.ripka@badenova.de Axel Oliva, Mehmet Elci, Wolfgang Kramer, Sebastian Herkel axel.oliva@ise.fraunhofer.de
  31. 31. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 30 Backup
  32. 32. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 31 badenovaWÄRMEPLUS GmbH & Co. KG  part of regional energy utility badenova AG & Co. KG  90 employees  heat supply for 50.000 people  annual sales 35 Mio €/a  heat production 250 m. kWh/a electricity production 80 m. kWh/a  150 heating stations (37 kW … 43 MW) - 40 CHP (natural gas, bio-methane) - 14 wood-based - 4 large heat pumps - 2 solar thermal (30 m² CPC, 230 m² V)  35 heat grids, network ca. 130 km
  33. 33. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018 Heating Stations in the Buildings 32
  34. 34. „Local Renewables 2018“ Freiburg i.Br., 25.10.2018  Very high individual effort, although similar “standard” systems (communication, detailed planning, construction, site management)  Lack of execution quality  Standard hydraulic and control functions are faulty - not the innovative part  The technological maturity of medium-sized ST systems is not satisfactory! Fraunhofer ISE, solites 33 Installation and bringing into service

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