COWI NORTH AMERICA ENERGY Demonstration of low temperature geothermal as innovative supply for district heating networks

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1 Demonstration of low temperature geothermal as innovative supply for district heating networks JENS O. HANSEN President/Managing Director 35 Corporate Drive, Suite 1040 Trumbull CT ANDREW T. CHRISTENSEN CHIEF SENIOR SPECIALIST Cell:

2 COWI WORLD WIDE 2 FABRUARY 2012

3 COWI DISTRICT ENERGY DISTRICT ENERGY 150 STAFF DISTRICT ENERGY 2,000 PROJECTS 3

Project conclusions THE PROJECT Low tempeature Geothermal Biomass, wood chips District Heating network, extension GEOTHERMAL PLACE Sonderborg,

4 Project conclusions THE PROJECT Low tempeature Geothermal Biomass, wood chips District Heating network, extension GEOTHERMAL PLACE Sonderborg, Denmark. Existing district heating system servicing the town and university campus. 4 CONCLUSION Low temperature geothermal is an option! COSTS $55,000,000

5 The Project Low temperature geothermal Biomass, wood chips District heating pipeline 5 5 DECEMBER 2011 HOW TO USE THE NEW COWI POWERPOINT TEMPLATE

6 Finding optimal location 6

7 COWI NORTH AMERICA ENERGY Existing situation Sønderborg Fjernvarme A.m.b.a. Duration curve for Sønderborg City and Dybbøl Frydendal Existing situation 80 1 MW = 3,413 k btu/h Heat Only Boilers [G btu/year] To cooling tower [MW] [TJ/year] Til varmelager [MW] Heat Only Boilers [MW] Combined Cycle CHP [MW] 60 Heat supply to network Fra geotermiske brønde [MW] 901 [G btu/year] [TJ/year] Drivenergi [MW] Drivenergi varmelager [MW] 50 Fra varmelager [MW] Load [MW] KV-varmeleverance ref. driftsstrategi [MW] Brutto solid waste based power 44,681 [MWh-el/year] CHP plant internal 10,513 [MWh-el/year] 40 Combined Cycle CHP [G btu/year] [TJ/year] 34,168 [MWh-el/year] Net CHP solid waste To cooling tower 58 [G btu/year] 61.4 [TJ/year] 20 CHP - solid waste [G btu/year] [TJ/year] Hours Existin steam turbine operation

8 Load [MW] 1 MW = 3,413 k btu/h COWI NORTH AMERICA ENERGY New situation Heat to DH system total Heat Only Boilers Combined Cycle CHP 901 [G btu/year] Sønderborg Fjernvarme A.m.b.a. Duration curve for Sønderborg by and Dybbøl Frydendal K 8, max geotermal 29,000 k btu/h (8.5 MW) [TJ/year] 3.4 [G btu/year] 3.6 [TJ/year] 0.6 [G btu/year] 0.6 [TJ/year] Geothermal wells [TJ/y] Fluegas scrubber 2 [TJ/y] Fluegas scrubber 1 [TJ/y] Drive energy abs chiller [TJ/y] Heat exchanger oper. [TJ/y] SUM [TJ/y] Fuel [TJ/y] Fuel [ton/y] Cond. water [ton/y] ,433 18, G btu/y Max_design FJV G btu/y Max_akt_FJV G btu/y 153 G btu/y 24 G btu/y 340 G btu/y 208 G btu/y Brutto solid waster based power CHP internal consumption Net solid waste based power Til køletårn [MW] Sønderborg Kedler [MW] CC- KV [MW] Geotermiske brønde Kedeldrift Røggaskondensator 2 Røggaskondensator 1 Drivenergi KV-varmeleverance ref. driftsstrategi [MW] 44,681 [MWh-el/year] 10,513 [MWh-el/year] 34,168[MWh-el/year] 58 [G btu/year] To cooling towers 61.4 [TJ/year] 10 0 CHP - solid waste 557 [G btu/year] [TJ/year] 8 Geothermal plant and and wood chip fired boilers Existing steam turbine Hours

9 Produktionsfordeling, varme Sønderborg Fjernvarme A.m.b.a. - geotermisk anlæg Indikativ varmeproduktionsfordeling ved alternative varmeleverancer fra undergunden og alternative anlægskonfigurationer COWI NORTH AMERICA ENERGY Planning stage, scenarios 100% 90% % 70% 60% 50% % Sønderborg kedler TJ/år Procesvarme, biomasse TJ/år 30% 20% 10% Varme, undergrunden TJ/år KVV CC baseret varme TJ/år Drivvarme fra KVV TJ/år KVV affaldsbaseret fjernvarme TJ/år 0% 9

10 Principle drawings 10

11 Thermoflex model 11

12 Termis model (hydraulic model) 12

13 Højde [m] og tryk i [mvs] COWI NORTH AMERICA ENERGY Coupling to geothermal Flowmåler F7 Flowmåler F6 Sønderborg Fjernvarme A.m.b.a. Kobling med geotermisk anlæg Konfiguration K8 Flowmåler F Fordampere Flowmåler F8 Flowmåler F9 Flowmåler F10 Absorbere No 1 og No 2 Absorbere No 3 og No 4 Kondensatorer G - Pumper, opvarmet Varmevekslere i Spang vand fra Spang Varmeveksler, temp. justering og kedeldrift E - Pumper til fordampere Røggasvasker trin 2 Flowmåler F4 Røggasvasker trin 1 Varmevekslere, KVV Flowmåler F5 Shunt Sønderborg by B - Pumper. trin 2 Varmevekslere Sønderborg by til nyt transmissionssystem Trykholdning 20 F - Pumper fjv. retur til absorbere og A - Pumper, trin 1 (ikke i drift) Spang kondensatorer KVV / Kærvej 0 Vestermark Afstand [m] Flowmåler F1 13

14 Energy Thermal energy to absorption chillers: 68,000 k btu/h (19.9 MJ/sec) Energy from geothermal wells: 42,700 k btu/h (12.5 MJ/sec) Energy from flue gas scrubbers: 28,700 k btu/h ( 8.4 MJ/sec) Energy via heat exchangers: 6,800 k btu/h ( 2.0 MJ/sec) Delivery to DH system: 146,400 k btu/h (42.9 MJ/sec) 14

15 Investment cost Geothermal wells and surface equipment: M$ 36 Wood chip fired boiler plant: M$ 16 New DH piping: M$ 3 15

16 Efficiencies The geothermal plant will substitute 341 G btu/year (360 TJ/year) or 38% of the systems annual energy needs today based on natural gas with energy produced by renewable energy In the future system more than 95% of the energy will come from either solid waste incineration or renewable energy sources System efficiency for geothermal plant above 170% 16

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18 18 5 DECEMBER 2011 HOW TO USE THE NEW COWI POWERPOINT TEMPLATE

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22 Demonstration of low temperature geothermal as innovative supply for district heating networks JENS O. HANSEN President/Managing Director 35 Corporate Drive, Suite 1040 Trumbull CT ANDREW T. CHRISTENSEN CHIEF SENIOR SPECIALIST Cell:

Integrating renewable energy sources and thermal storage

Integrating renewable energy sources and thermal storage Sven Werner Halmstad University Sweden BRE, October 10, 2013 1 Outline Fundamental idea of district heating Heat supply to European district heating