Geothermal research program brookhaven national laboratory
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GEOTHERMAL RESEARCH PROGRAM BROOKHAVEN NATIONAL LABORATORY PowerPoint PPT Presentation

GEOTHERMAL RESEARCH PROGRAM BROOKHAVEN NATIONAL LABORATORY. CAPABILITIES. Evaluation of engineering properties of cement- and polymer-based materials. Numerical modelling of material behaviour. Coatings and alloys for corrosion control. Recovery of geothermal silica and other minerals.

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GEOTHERMAL RESEARCH PROGRAM BROOKHAVEN NATIONAL LABORATORY

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GEOTHERMAL RESEARCH PROGRAM BROOKHAVEN NATIONAL LABORATORY


CAPABILITIES

  • Evaluation of engineering properties of cement- and polymer-based materials.

  • Numerical modelling of material behaviour.

  • Coatings and alloys for corrosion control.

  • Recovery of geothermal silica and other minerals.

  • Formulation of materials with specific properties.

  • Computational structural mechanics.

  • Heat transfer analysis.

  • Non-destructive testing.


OVERALL OBJECTIVES

  • Meet the need for high performance, cost effective materials technology in geothermal applications.

RELATIONSHIP TO PROGRAM GOALS

  • Support programmatic goals of reducing the overall cost of geothermal energy by:

    • Reducing power plant capital and O&M costs

    • Reducing well completion costs

    • Ensuring the integrity and prolonging the life of geothermal wells


Acid Resistant Cements

Structural Response Analysis for Well Cements

RELATIONSHIP TO PROGRAM STRUCTURE

Coatings and HX Liners

ESR&T

Non-Destructive Testing, Integrity Assessment and Repair of Piping

Drilling & Completion


WORK SCOPE

  • Synthesis of new materials

  • Better use of existing materials

  • Experimental characterization of material properties

  • Improved techniques for monitoring material performance and assessing integrity of equipment

  • Computational analysis to predict material response behaviour to mechanical and thermal loads

  • Field validation in collaboration with industry partners and technology transfer


ORGANIZATION

BNL PROGRAM ON MATERIALS FOR GEOTHERMAL APPLICATIONS

Program Leader: M.L. Berndt

Materials Engineering and Analysis

Materials Chemistry

M.L. Berndt

A.J. Philippacopoulos

T. Sugama


FY04 PROJECTS


FTE STAFF LEVELS


ACTIVITIES (I): Coatings and Acid Resistant Cements

  • Development of PPS powder coating technology for HX tubes and well head pipes.

  • More field tests on PPS-based HX liners.

  • Continued development of high-temperature PPS and PEEK and organometallic coatings for various applications.

  • Scale up of OMP coating technology for 20-ft.-long condensers.

  • Development of low surface energy coating for steam separators at temperatures up to 250°C.

  • Continued development of sodium silicate and sodium phosphate-activated well cements.

  • Developing setting retarders in enhancing resistance to acid of CaP cement.

  • Monitoring integrity of N2-foamed CaP cement being placed in Coso wells and fiber-reinforced CaP cement liner for well-head pipe at CalEnergy power plant.


ACTIVITIES (II): NDT and Piping Integrity Assessment

  • Field demonstration of long range guided wave NDT method on piping at Mammoth Pacific.

  • Remaining strength assessment of corroded piping to develop guidelines for repair/replacement decisions.

  • Develop and evaluate specific composites for in-situ repair and life extension of corroded geothermal piping systems.


ACTIVITIES(III): Structural Response Analysis of Well Cements

  • Working to develop an engineering-based approach for selection of well cements.

  • Integrating experimental testing, modelling and end-user input.

  • Evaluating thermoelastic response using FE coupled models representing the casing-cement-formation system.

  • Collaborating with geothermal operators in US and Mexico to obtain well data and analyze response to pressure transients (FY04).


HIGHLIGHTS: Results from Structural Response Analysis Of Well Cements

  • Received 2003 GRC Best Paper Award: “Properties and Thermoelastic Response of Conventional and Fiber Reinforced Well Cements”.


HIGHLIGHTS: Results from Structural Response Analysis Of Well Cements


HIGHLIGHTS: Results from Structural Response Analysis Of Well Cements

Thermoelastic Response (Transient)


KNOWLEDGE GAPS

  • Prediction of long-term materials behaviour in complex and dynamic environments.

  • Appropriate materials selection criteria.

  • Gaps can be addressed by:

    • Detailed analysis/parametric studies to increase our understanding of material behaviour in geothermal systems.

    • Development and verification of predictive models to determine factors controlling failure.

    • Engineering-based approach to materials selection rather than trial and error or “hand waving”.


INDUSTRY COLLABORATION

  • Needed to determine materials problems and viable solutions.

  • Enhancements in industry collaboration include:

    • Providing detailed data on request e.g., operating parameters, material performance

    • Long-term commitment to projects in terms of field applications and cost sharing

    • Consensus and consistency on specific needs

    • Continuity in staff support

    • Greater interest, interactions and enthusiasm

    • Revitalization of GDO and GPO, or similar


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