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Evaluation of Power Output, Efficiency, and Reliability Characteristics of the Amonix Power Generation System

2. Project Objectives. Phase I Objectives- Characterize the power and energy performance- Identify and quantify losses- Investigate ways of improving performance- Determine long term power/energy performance- Estimate annual energy performance- Generate reliability data base- Estimate of MTBF and MTBI of system, subsystem, components- Identify

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Evaluation of Power Output, Efficiency, and Reliability Characteristics of the Amonix Power Generation System

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    1. Evaluation of Power Output, Efficiency, and Reliability Characteristics of the Amonix Power Generation System

    2. 2 Project Objectives

    3. 3 Amonix High Concentrating PV System

    4. 4 Objective: - Reduce receiver cost - Increase energy performance Results: - Reduced cell material (~37%) - Increased cells per wafer (~8 %) - Reduced cell packing material (30%) - Reduced number of manufacturing processes - Increased performance (~1.7%) Status: - Manufactured wafers & cells - Manufactured cell packages - Manufactured several plates & tested Project Status Task 5: Advanced Receiver Plate

    5. 5 Project Status Task 6: Multijunction Cell Module Objective: - Test long-term performance of plate Results: - Amonix current production plate (~18.2%) - First multijunction plate (>24%) - Status: - Designed module and support frame - Fabricated and tested first plate - Install module in March

    6. 6 Project Status Task 6: Multijunction Cell Module (cont.)

    7. 7 Project Status Task 7: Thermal Analysis Analyze the passive cooling system Create a numerical model using FLUENT and compare the results to previous data taken from the field Optimize heat sink design

    8. 8 Simplified Analysis 1 chamber 2D model with 6 cells Boundary Conditions Ambient air is 313K Constant heat source on cells Surface temperature conditions on the top and bottom of chamber considered constant (obtained from the field) Numerical Model Air is assumed to be incompressible ideal gas The standard k-e turbulence model has been employed to simulate the air flow Rayleigh Number =3*109

    9. 9 Mesh System

    10. 10 Temperature Distribution Results

    11. 11 Velocity Vector Results

    12. 12 Future Work on Thermal Analysis Compute numerical analysis with air assumed to be an ideal gas and compressible Simulate chamber at an angle Compute a numerical analysis with radiation 625W/m^2 Heat Flux instead of constant temperature Adiabatic Conditions on the top and bottom of the chamber Assume that only the fins are dissipating heat Periodic Boundary condition Model a multi chamber module in 2D Simulate 1 chamber with different heat sinks

    13. 13 Results to Date Phase I: Monthly Power Generation

    14. 14 Results to Date: Phase I - Reliability

    15. 15 Results to Date: Phase I – Lesson learned Lessons Changes Optical alignment improvements - Lens plate optical alignment ……………………Developed a new process - Aligning Module with tracking system …………Developing new approaches Improvement in reliability of inverter …………….New Supplier Improvement in reliability of controls ……………Next generation control system under development Lens washing - Washing method, solution, equip., etc………….Ongoing Investigations - Lens surface protection…………………………..Ongoing Investigations

    16. 16 Conclusions & Next Steps Conclusions - NSWEP program is very beneficial to development of Amonix technology - Identified areas where performance and reliability can be improved - Testing of the new receiver plate - Proving ground for testing new ideas - Established this equipment's reliability in an urban, NV environment Next steps Continue with daily operation recording performance and reliability data to improve performance Fabricate 48 advanced receiver plates and install on UNLV unit Fabricate multijunction module and mounting bracket, install on unit Continue with thermal analysis and compare with test data

    17. 17 Amonix and Nevada Power Project Nevada Power has been independently monitoring the UNLV system for the past year Location: Clark Generation Station, Las Vegas Install 3 units or 75 kW of Amonix systems NV Portfolio Standard 175,000 Renewable Energy Credits per year Nevada Power, NREL and UNLV collaboration on monitoring Further research and knowledge of IHCPV Completion date: End of March

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