DBDH Seminar 19. november 2014

Transkript

1 DBDH Seminar 19. november 2014, Sustainable district heating Chefkonsulent Peter Gedbjerg

2 Varmeplan Aarhus

3 Magistraten for Center for Miljø og Energi

4 Klimavarmeplan 2010 Klimavarmeplan 2010 is the strategic plan for the development of district heating in the greater Aarhus area towards 2030: The city council wants to focus on: Security of supply CO2 Energy efficiency Less fuel (fossil as well as biomass) Sustainable energy Integration with electricity (and biomass conversion, transport and waste)

5 The Plan What we do Studstrup 3 life extension program will secure opperations until 2030 (535 MW ) Studstrup 3 conversion to wood pellets (2015) 80 MW electrical boilers (2*40 MW at Studstrup) New biomass fuelled (straw and wood ships) combined heat and power plant 37/80 MW (2016) Introduction of heat prices based on an hourly basis (Real time prices) (2014) What we intend To do MW baseload from non fuel sources: 14 MW sea water based and electrically driven heat pump (expected 2016) 10 MW solar plant (thermal collectors, heat storage, absorption heat pump, straw fired boiler) (2017) Small scale ultra low temperature district heating scheme ( ) And other activities to establish the foundation for drafting Klimavarmeplan 2030 Our goal Sustainable district heating plants to replace Studstrupværket in 2030 (535 MW) Diversified heat production (ownership, technology, (fuel-) source)

6 What we do today Coal / Biomass Studstrup 3 Waste to Energy plants Biomass fueled boilers Oil fired peak load Fossil Biomass Sustainable Sustainable energy Straw fired CHP 0% 10% 20% 30% 40% 50% 60% 70% 80%

7 What we will be doing in 2017 Coal / Biomass Studstrup 3 Waste to Energy plants Biomass fueled boilers Oil fired peak load Fossil Biomass Sustainable Sustainable energy Straw fired CHP 0% 10% 20% 30% 40% 50% 60%

8 Our goal Coal / Biomass Studstrup 3 Waste to Energy plants Biomass fueled boilers Oil fired peak load Fossil Biomass Sustainable Sustainable energy Straw fired CHP 0% 10% 20% 30% 40% 50% 60%

9 Sources for sustainable energy Large scale heat pumps (sea water / sewage) Solar (high/low temperature) Heat storage (short, mid and long term) Industrial surplus heat / Biomass conversion (Aarhus Harbor is home to many agro industrial industries) Geothermal heat District Cooling

10 Projects supporting the drive for sustainability Electrical boilers at Studstrupværket - 2 *40 MW in commissioning phase operational in December 2014 Studstrupværket Unit 3 conversion to wood pellets in construction operational in October 2015 Biomass fired CHP in construction Operational in December 2016 Aarhus Ø: 12 MW heat pump City Council in December 2014 Geding: Phase 1 Ultra Low Temperature DH in commissioning phase

11 PARAT IEH High Voltage boiler Kapasitet (MW) Kapasitet (T/h) D (mm) H (mm) Transportvekt (kg) Driftsvekt (kg) Testvekt (kg)

12 SSV elkedler Budget: 80 mio kr

13 Projects supporting the drive for sustainability Electrical boilers at Studstrupværket 2 *40 MW in commissioning phase operational in December 2014 Studstrupværket Unit 3 conversion to wood pellets in construction operational in October 2015 Biomass fired CHP in construction Operational in December 2016 Aarhus Ø: 12 MW heat pump City Council in December 2014 Geding: Phase 1 Ultra Low Temperature DH in commissioning phase

14 SSV3 Biokonvertering 1. Losseanlæg 2. Transportanlæg til lagersilo 3. Lagersilo 4. Transportanlæg fra lager silo til og med dagsiloer 5. Møller, m.m. 6. Fyringsudrustning 7. Miljøanlæg 8. Kulaskedosering

15 CO2 emissions from District Heating production in the grater Aarhus area

16 Projects supporting the drive for sustainability Electrical boilers at Studstrupværket 2 *40 MW in commissioning phase operational in December 2014 Studstrupværket Unit 3 conversion to wood pellets in construction operational in October 2015 Biomass fired CHP in construction Operational in December 2016 Aarhus Ø: 12 MW heat pump City Council in December 2014 Geding: Phase 1 Ultra Low Temperature DH in commissioning phase

17 Biomass fired CHP

18 Main Data Fuel Energy (LCV): 110 MW Electricity production: 34,8 MW DH production: 78,9 MW Efficiency (LCV): 103% Fuel: ton/year (straw and wood chips) Fuel: 672 ton/day (66 lorries) (straw) Fuel storage: 67 timer (3168 big bales) Wood chips up to 50 % (by energy content)

19 Tecnical Data Steam temperature 540 C bar Flue gas cleaning: bag filter, SCR DeNOx, condensing scrubber with added lime Sewage(10 m3/day) Condensing scrubber produces more than m3 of feed water each year Vibration grate Slagging super heater in combustion chamber 4 fuel feeders with BWE type shredders Each feeder with continuous weighing and humidity measurement

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21 Storage for Straw

22 Site

23 Construction has started!

24 MW 1000 Produktionsplan 2016 Efter biomassekonvertering og etablering af nyt halmfyret kraftvarmeværk Studstrupværket Unit MW Oliekedler Studstrupværket Skanderborg Flis Halmfyret kfrafvarme Renosyd AVA AffaldsCenter Overskudsvarme Rådighed oliekedler Rådighed Studstrupværket Rådighed andre anlæg Other Plants 191 MW Årets timer Production Surplus Heat AVA Waste to Energy Renosyd Waste to Energy Biomass fired CHP Skanderborg biomass boiler Studstrupværket Peak load - oil 315 TJ 2018 TJ 615 TJ TJ 425 TJ TJ 33 TJ

25 Projects supporting the drive for sustainability Electrical boilers at Studstrupværket 2 *40 MW in commissioning phase operational in December 2014 Studstrupværket Unit 3 conversion to wood pellets in construction operational in October 2015 Biomass fired CHP in construction Operational in December 2016 Aarhus Ø: 12 MW heat pump City Council in December 2014 Geding: Phase 1 Ultra Low Temperature DH in commissioning phase

26 Varmeforsyning af Aarhus Ø

27 Heat Pump Modul for Aarhus Ø

28 Projects supporting the drive for sustainability Electrical boilers at Studstrupværket 2 *40 MW in commissioning phase operational in December 2014 Studstrupværket Unit 3 conversion to wood pellets in construction operational in October 2015 Biomass fired CHP in construction Operational in December 2016 Aarhus Ø: 12 MW heat pump City Council in December 2014 Geding: Phase 1 Ultra Low Temperature DH in commissioning phase

29 Bottom Up on the District Heating Network

30 Danfoss Micro Booster station Akkumulerings beholder Vand varmer Radiator kreds

31 Geding Electricity for hot tap water Typical heat consumption in a Danish one family house: kwh/year Hot tap water (25%): 4500 kwh/year COP of heat pump in Micro Booster unit: 4,5 Heat pump will raise temperature from 40 to 50 C the rest (from C) will take place in a heat exchanger Effective COP will be 4.5*4=18 Electricity for hot tap water 4500/18 = 250 kwh/år

32 Geding

33 Microbooster

34 Thank you very much

35 Back Up Slides

36 SSV Elkedler - fjernvarmekobling

37 Varmeplan Århus Central produktion og rigelig kapacitet

38 Klimavarmeplan 2010 Udviklingen baseret på Klimavarmeplan 2010 medfører et langt mere komplekst energisystem i 2030

39 VE i varmeforsyningen Aarhus fjernvarme på 100% sol et tankeeksperiment Forudsætning: Nuværende varmebehov dækket 100% med solvarme Tab i sæsonlager på 20% (erfaring fra eksisterende anlæg) Fremløbstemperaturen sænkes til 75 C (i stedet for 105 C) Nøgletal: Nødvendigt solfangerareal 8.5 km 2 grundareal ca 20 km 2 (2500 fodboldbaner) Nødvendigt varmelager 37 mio m 3 grundareal ca 4 km 2 Anslået pris 15 mia kr (ny blok på Studstrupværket ca 5 mia kr)

40 VE i varmeforsyningen Tankeeksperimentet illustrerer, at 100% solvarme er en mulighed, men arealbehovet er en barriere. Ved at sænke solvarmeandelen til 50% og supplere med andre teknologier (feks varmepumper) kan arealbehovet reduceres væsentligt. Solvarme kan introduceres gradvist demonstrationsprojekter under forberedelse Blå: Solfanger, Rød: Varmelager Naturlig størrelse

41 Varmeforsyning Aarhus Ø

42 Site

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44 Studstrup Wood Pellets

45 Princip i fjernvarmekobling

46 Status sept Anlægsbevilling fra byrådet 13. august (1.3 mia.) Rådgiver på BKVV: COWI og F&M Rådgiver på transmissionsanlæg: NIRAS BWE: ovn/kedel og røggasrensning Skoda Dosan: turbine og fjernvarmeanlæg Fredskoven er ryddet og arkæologiske udgravninger er gennemført uden væsentlige fund Byggemodningsentreprisen (Arkil) er opstartet og bortgravning af m3 opstartet Kontrakter på BKVV Byggeplads og skurby Ramirent Betonskorsten - MTH Kontrakter på transmissionssystemet Anlæg og rør - Barslund (opstart 1. okt) Rørleverance Logstor

47 Varmeforsyning Aarhus Ø

48 Varmeforsyning Aarhus Ø

49 Geding

50 Bottom up på transmissionsnettet Et koldt energifordelingssystem bryder helt med en traditionel opbygning af varmeforsyningen. Systemet baser sig på: Mediet er 10 40oC vand Overskudsvarme fra boliger og virksomheder kan lettere og billigere benyttes i systemet Varmepumpeenhed i alle bygninger hvor energien hentes fra mediet Varmebeholder i udvalgte bygninger for regulering og udnyttelse af lavpris tidsrum Hele systemet inklusive varmepumper og varmebeholder samt elforbrug hertil kan opfattes som fjernvarmesystemet og opereres og reguleres af AVA.