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Solar Chimney Power Plant

Solar Chimney Power Plant. ME 463 Senior Design Project Design Review May Lin Chang Yu Jiang Payton Lee Katja Strohm Katharina Schweigler. Agenda. Background Katja Strohm Initial Design Concept Katja Strohm Preliminary Calculation May Lin Chang Proposed Innovation

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Solar Chimney Power Plant

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  1. Solar Chimney Power Plant ME 463 Senior Design Project Design Review May Lin Chang Yu Jiang Payton Lee Katja Strohm Katharina Schweigler

  2. Agenda Background Katja Strohm Initial Design Concept Katja Strohm Preliminary Calculation May Lin Chang Proposed Innovation Katharina Schweigler Materials and Cost Payton Lee Conclusion Yu Jiang M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  3. Background • What is a solar tower? • Air heats up under greenhouse effect • Hot air rises through chimney • Updraft drives turbine M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  4. Background • Why solar tower? • Greenhouse, chimney, and turbine are available • Renewable energy M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  5. Background • Design Project Motivation • Low cost energy generation • Innovation for renewable energy M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  6. Initial Design Concept Chimney: • Pressure tube • Tall, hollow cylinder with small diameter • Realized with PE pipes and steal pipes Turbine: • Located on the bottom of the chimney • Mounted through a case in chimney M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  7. Initial Design Concept Collector area: • Large greenhoese • Plastic film covering the ground • App. diameter: 15m • Installed 4 -10 above ground on wooden support structure Energy storage: • Black tubes under collector area filled with water • Heat capacity of water much higher than soil M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  8. Preliminary Calculation Chimney/Tower ηtow Solar Energy, Q_dotsolar Turbine ηtur Collector ηcol M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  9. Preliminary Calculation Principle Equations • Power output of the plant, P • Solar Energy • Efficiency Nomenclatures • Solar Radiation Energy [W] • Component Efficiency • Global Horizontal Radiation [W/m2] M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  10. Preliminary Calculation M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  11. Proposed Innovation • Mirrors to “enlarge” greenhouse area • Heat exchanger • Black foil on the ground M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  12. Proposed Innovation Mirrors floating material (Styron foam) • Increase the amount of radiation on greenhouse area • Angle around horizontal axis adjusted by electric motor • Angle around vertical axis adjusted by bionic mechanism Ring filled with water Air bubbles expanded bubble shrunk bubble Shadow due to blade Sun M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  13. Proposed Innovation Mirrors Bionic mechanism • Radiation heats gas in bubbles • Bubbles expand and push ring of mirrors -> Mirrors face sun Ring filled with water Air bubbles Mirrors M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  14. Proposed Innovation • Heat exchanger • Uses external heat to heat up the air additionally eg. from another plant • Can be oil which is heated between angled mirrors on the ground Cold Oil Hot Oil M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  15. Proposed Innovation Black foil • Placed under oil pipes • Heats up ground more effectively • Goal: Store heat for night operation M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  16. Materials & Cost Collector (Greenhouse Plastic Sheet) • Requirements • Opacity • Durability • Weight • Cost • Between $100 and $600 depending on size and quality M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  17. Materials & Cost Chimney • Requirements: • Weight • Stability • Manufacturability • Supported by steel beam or wire M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  18. Materials & Cost Computer fan as turbine • Requirement • Efficient • Low noise • Cost • Between $5 and $40 (depending on requirement) M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  19. Future Plans • Determine the exact dimensions • Finalize design – select improvement method • Material selection and Cost estimation • Ordering and Construction M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

  20. References: Gannon, A. J., Backström, T.W. v. (2000). "Solar Chimney Cycle Analysis with System Loss and Solar Collector Performance", Journal of Solar Energy Engineering, 122 (3), 133-137. Schlaich, Bergermann, Schiel, and Weinrebe “Design and Commercialization of a Solar Updraft Tower” Schlaich J. “The Solar Chimney: Electricity From Sun”, Edition Axel Menges, 1995. Thank you M. Chang, Y. Jiang, P. Lee, K. Schweigler, and K. Strohm

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