DBDH Seminar 19. november 2014

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

Varmeplan Aarhus

Magistraten for Center for Miljø og Energi

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)

The Plan What we do 2013-2017 Studstrup 3 life extension program will secure opperations until 2030 (535 MW - 2014) 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 2014-2022 80 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 (2014 2020) And other activities to establish the foundation for drafting Klimavarmeplan 2030 Our goal 2020-2030 Sustainable district heating plants to replace Studstrupværket in 2030 (535 MW) Diversified heat production (ownership, technology, (fuel-) source)

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%

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%

Our goal - 2030 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%

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

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

PARAT IEH High Voltage boiler Kapasitet (MW) 31-45 Kapasitet (T/h) 46-67 D (mm) 3.400 H (mm) 6.000 Transportvekt (kg) 14.000 Driftsvekt (kg) 23.000 Testvekt (kg) 44.000

SSV elkedler Budget: 80 mio kr

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

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

CO2 emissions from District Heating production in the grater Aarhus area

Biomass fired CHP

Main Data Fuel Energy (LCV): 110 MW Electricity production: 34,8 MW DH production: 78,9 MW Efficiency (LCV): 103% Fuel: 240.000 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)

Tecnical Data Steam temperature 540 C - 111 bar Flue gas cleaning: bag filter, SCR DeNOx, condensing scrubber with added lime Sewage(10 m3/day) Condensing scrubber produces more than 60.000 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

Storage for Straw

Construction has started!

1 173 345 517 689 861 1033 1205 1377 1549 1721 1893 2065 2237 2409 2581 2753 2925 3097 3269 3441 3613 3785 3957 4129 4301 4473 4645 4817 4989 5161 5333 5505 5677 5849 6021 6193 6365 6537 6709 6881 7053 7225 7397 7569 7741 7913 8085 8257 8429 8601 MW 1000 Produktionsplan 2016 Efter biomassekonvertering og etablering af nyt halmfyret kraftvarmeværk 900 800 700 600 500 400 300 200 Studstrupværket Unit 3 535 MW Oliekedler Studstrupværket Skanderborg Flis Halmfyret kfrafvarme Renosyd AVA AffaldsCenter Overskudsvarme Rådighed oliekedler Rådighed Studstrupværket Rådighed andre anlæg 100 0 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 2.258 TJ 425 TJ 5.551 TJ 33 TJ

Varmeforsyning af Aarhus Ø

Heat Pump Modul for Aarhus Ø

Bottom Up on the District Heating Network

Danfoss Micro Booster station Akkumulerings beholder Vand varmer Radiator kreds

Geding Electricity for hot tap water Typical heat consumption in a Danish one family house: 18.000 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 10 40 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

Geding

Microbooster

Thank you very much

Back Up Slides

SSV Elkedler - fjernvarmekobling

Varmeplan Århus - 1985 Central produktion og rigelig kapacitet

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

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)

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

Varmeforsyning Aarhus Ø

Studstrup Wood Pellets

Princip i fjernvarmekobling

Status sept. 2014 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 100.000 m3 opstartet Kontrakter på BKVV Byggeplads og skurby Ramirent Betonskorsten - MTH Kontrakter på transmissionssystemet Anlæg og rør - Barslund (opstart 1. okt) Rørleverance Logstor

Varmeforsyning Aarhus Ø

Geding

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.