Geothermal and Heat Storage - New Project Campus North, KIT-CN

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1 Institute of Applied Geosciences AGW Geothermal Research Geothermal and Heat Storage - New Project Campus North, KIT-CN Thomas Kohl Eva Schill, Jörg Meixner, Jens Grimmer, Emmanuel Gaucher, Katharina Schätzler Please insert a figure in the slide master KIT The Research University in the Helmholtz Association

2 79% fossil ~87% base load 50% therm. energy The German CO 2 Challenge : Primary energy Energy Situation Today: Dependency on base load & fossil fuels Total CO 2 emission: unchanged Annual cost of energy transition: up to 20x10 9 Electricity in focus volatile sources Thermal energy strongly ignored Goals Climate Protection Planning 2030: CO 2 reduction for buildings by 67%

3 Geothermal Energy Research in Upper Rhine Graben Largest temperature anomaly in central Europe High temperature storage capacity in old hydrocarbon reservoirs Cross-border cooperation New Geothermal Utilization T 2.5km

4 GeoEnergy and Energetic Infrastructure at KIT-CN Characteristic Features: District heating with CHP (gas fired) Local supply of heat/chill (HP operation) Modular Low Temperature Power Plant (MoNiKa, 100kW installed) EnergyLab 2.0: Possibilitiy to connect MoNiKa Waste heat from Research Plants Concept for GeoEnergy Shallow Cooling High T. Utilization 100<T<190 C)

5 Existing Heat KIT - CN Autonomous heat supply Heat production currently 100% from fossil: gas (Backup: oil) CHP base load heat supply (heating demand summer) 2 MW e/t Temporary 2 CHP units for scientific purposes 2 * 4.5 MW e/t 3 hot-water boilers for peak load 49 MW t 1 2 3

6 Local heat network Temperature level (2.5 yrs) Inlet temperature return temperature Volumetric flow rate Heat Demand CN Gross: GWh t Losses: 20% Base load: 3-4 GWh t Distribution (284 bldg.) 90% bldgs require 50% of energy Inlet Temperature depend. on air temp. 6

7 Energy Balance 2017 Hot-water boilers Energy Load Profile 50 GWh t 7 Goal: Replace Hot Water Boiler by HT Thermal Storage

8 Geological Resource: Upper Rhine Graben Cross-Section Different Tertiary Graben Fillings Northern Southern Reservoir Rocks exist in different depths / temperature ranges

9 Geological Resource Tertiary Structures CN KIT-CN earlier oil production after Wirth (1962) Geotis

10 Geothermal Resource In-situ conditions at KIT-CN: Temperature Anomaly T ~100 C in 1.2km T>170 C in 3 km Natural reservoir rock in tertiary sediments INSHEIM SOULTZ BRÜHL BRUCHSAL CN RITTERSHOFFEN Baillieux et al. (2013)

11 Simulation: High-temperature storage systems Seasonal storage of heat: Summer: Injection of excess heat Winter: Production of stored heat Results: 1 st techno-economic feasibility in Rhine Graben Efficiencies η > 75%!! Economic long-term stability

12 Scientific Demonstrator Demonstrate economic feasibility Storage of heat in earlier oil reservoirs (horizontal wells, shallow sandstone formation) Production of heat from deep wells (provide base-load, also excess heat in summer) new type of geothermal utilization To be upscaled for real needs Based on experience from existing prototypes in Upper Rhine Graben Riehen, CH (65 C), Bruchsal, D (130 C), Rittershoffen, F (160 C), acceptability of this technology No economic pressure:low flow rates, low pressure change Prevent any induced seismicity due to sensitive infrastructure, No massive stimulation Integrate the surrounding communities (foster joint discussion groups, full transparency) scientific challenges Extraction of Li, new monitoring concepts, material coating, corrosion

13 Possible Future HT Storage Concept Two thermal water circuits V Binary Power Plant C 110 C District Heating Network C Winter Heat Demand 180 C TWC 1 50 C 110 C Summer Heat Pump Heat Exchanger 100 C TWC 2 65 C Leopoldshafen_20 Buntsandstein 173 C in m 49,9C/km (12 C top) Heat Provider Fuel Burner Geothermal Production ca. 3 km 1 Doublet, 10 l/s Peak Load Boiler Backup System Aquifer Storage ca. 1 km 1-3 Doublets, 10 l/s 13

14 Vision: "Heat Lab" at KIT-CN CH4( g) C( s) 2H2( g) Cogeneration (seasonal) Sector coupling Sector coupling KALLA Waste heat Baseload geothermal heat Sector coupling BHKW

15 Conclusion: Importance of large research infrastructures French-German scientific cooperation with industry : Example Soultz-sous-Forêts: >400 scientific publications Interreg ( ) Projects supported Invest in future Attractive technology that has base-load capacity Education of future scientists and engenieers Quality assessment Demonstrator to integrate population Data assessment Future energy design Autonomous project at KIT-Campus Nord 15

16 Backup 16

17 Seismic Catalogue : 25 km around CN 245 earthquakes Monitored: M max 3.0 Seismically "quiet" 17