The European Technology Platform on Renewable Heating and Cooling - GEOTHERMAL PANEL

Transcription

1 The European Technology Platform on Renewable Heating and Cooling - GEOTHERMAL PANEL Brussels, 2 nd Sept 2011 Ruggero Bertani, ENEL / Chairman TP Geoelec

2 Strategic R&D priorities : deep Topic 1: Resource development Content/scope: To improve substantially the understanding of the nature of deep geothermal systems, and the processes involved, with emphasis on unconventional geothermal systems (UGS): EGS and supercritical conditions. To invent and develop new, and improve available, methods to explore and assess deep geothermal reservoirs. Introduce guidelines and best practices for siting of deep geothermal wells to reduce the number of unsuccessful wells. Research priorities: Development of exploration methods for deep geothermal resources including EGS Development of assessment methods for geothermal systems Research strategy for siting of deep geothermal wells Supercritical systems

3 Topic 2: Improved coupling of subsurface system and surface system Content/scope: Research on coupling subsurface and surface systems of geothermal power plants, including research on chemical scaling, corrosion, and non-condensable gases with the aim to improve performance for maximum efficiencies and long term utilization of the geothermal resources. Research priorities: Sustainability of the geothermal subsurface & surface systems (Corrosion and scaling in geothermal surface installations, Chemical processes in reservoirs and boreholes ) Long term utilization and exploitation of geothermal resources Mitigation of environmental impact of geothermal energy utilization (Atmosphere, Fresh water, Land) 3

4 Topic 3: Surface systems Content/scope: Large scale utilization of EGS would require systems of large capacity with multiple wells, exploiting high temperature resources, improving conversion efficiency, improving downhole pump temperature range and efficiency, using flash technology and reducing costs. Research priorities: Technology development should focus on developing a high temperature ESP downhole production pump for 250 C fluids of high salinity and considerably improving its efficiency over a wide spectrum of operating conditions (temperature, flow rate and head), in order to use it in the new EGS projects under development, as well as further advancing binary plants technology in terms of conversion efficiency and costs. Increase in binary plant efficiency and flexibility can be pursued in the short term through development and ground validation of multi level and supercritical cycle plants. ESP downhole pumps Binary plants Short term by 2015 up to 250 C efficiency gains multi level cycles supercritical cycles advanced working fluids Medium term by 2020 efficiency & costs heat exchangers Long term by 2050 up to 300 C and more improved turbines large capacity 4

5 Short term Roadmap for GT Electricity 2020/2050 by 2015 Medium term by 2020 Long term by 2050 ESP downhole pumps lineshaft pump up to 250 C efficiency gains up to 300 C and more Binary plants multi level cycles supercritical cycles advanced working fluids efficiency & costs heat exchangers Thermodynamical cycle improved turbines large capacity Flash & dry steam plants turbine washing condenser & piping material indirect heat exchangers seismic design cycle design & tools turbine LSB small geo-turbines 100% reinjection EGS specific EGS concept Stimulation EGS plants of 100 MW e new CHP configurations improved reliability costs 1,2-1,35 mio / MW e CO 2 as heat carrier fluid >400 C geo-power plants environmental footprint RESEARCH Exploration and assessment tools modular design materials Supercritical fluids Environmental impact

6 Topic 4: Enhanced Geothermal Systems Content/scope: Several complementary topics could be launched to lower considerably the cost per produced energy unit from geothermal resources by improvement of methods for geothermal drilling, stimulation of wells and engineering of the reservoirs : Research priorities: - Improvement and inventions of new of methods to enhance reservoir performance - Development of new high-temperature down-hole sensing tools for monitoring of dynamic processes in deep geothermal systems including supercritical fluid systems - European data exchange system by developing an interdisciplinary tool in the exploration, exploitation and management of geothermal reservoirs - Candidate novel deep drilling technologies Moreover, international cooperation on geological, geophysical and geochemical issues. 6

7 SHOPPING LIST : S SHORT M NEDIUM L LONG A. S DOWNHOLE PUMP, HIGH TEMPERATURE FLOW RATE B. S BINARY PLANT / EFFICIENCY WORKING FLUID COOLING LEG THERMODYNAMIC SUPERCRITICAL FLUID C. S SUPERCRITICAL SYSTEMS PROOF OF CONCEPT D. S DRILLING COST MITIGATION THROUG XX AND YY E. S ENVIRONMENTAL FOOTPRINT. REDUCTION EMISSION NOISE F. S RISK REDUCTION EVALUATION G. S 100% REINJECTION H. S HYBRID SYSTEM I. S HIGH T AND P INSTRUMENTATION J. S EGS STIMULATION AND EGS CONCEPT K. S FEASIBILITY MODEL SIMPLIFIED TOOL L. S RESURCE ASSESSMENT / SURFACE EXPLORATION INTEGRATION M. S MODULAR CONCEPT/ STANDARDIZATION N. S MATERIAL RESEARCH CORROSION EROSION

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