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oapen-20.500.12657-556362022-06-01T03:45:58Z Micro turbo expander design for small scale ORC Talluri, Lorenzo Tesla turbine fluid dynamics ORC micro expanders experimental campaign bic Book Industry Communication::K Economics, finance, business & management::KN Industry & industrial studies::KNB Energy industries & utilities bic Book Industry Communication::T Technology, engineering, agriculture::TG Mechanical engineering & materials::TGB Mechanical engineering bic Book Industry Communication::T Technology, engineering, agriculture::TH Energy technology & engineering bic Book Industry Communication::T Technology, engineering, agriculture::TQ Environmental science, engineering & technology The Tesla expander was first developed by N. Tesla at the beginning of the 20th century. In recent years, due to the increasing appeal towards micro power generation and energy recovery from wasted flows, this cost effective expander technology rose a renovated interest. In the present study, a 2D numerical model is realized and a design procedure of a Tesla turbine for ORC applications is proposed. A throughout optimization method is developed by evaluating the losses of each component. The 2D model results are further exploited through the development of 3D computational investigation, which allows an accurate comprehension of the flow characteristics. Finally, two prototypes are designed, realized and tested. The former one is designed to work with air as working fluid. The second prototype is designed to work with organic fluids. The achieved experimental results confirmed the validity and the large potential applicative chances of this emerging technology in the field of micro sizes, low inlet temperature and low expansion ratios. 2022-05-31T10:36:01Z 2022-05-31T10:36:01Z 2020 book ONIX_20220531_9788855180610_920 2612-8020 9788855180610 9788855180603 9788855180627 https://library.oapen.org/handle/20.500.12657/55636 eng Premio Tesi di Dottorato application/pdf Attribution 4.0 International 9788855180610.pdf https://books.fupress.com/isbn/9788855180610 Firenze University Press 10.36253/978-88-5518-061-0 10.36253/978-88-5518-061-0 bf65d21a-78e5-4ba2-983a-dbfa90962870 9788855180610 9788855180603 9788855180627 87 234 Florence open access
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The Tesla expander was first developed by N. Tesla at the beginning of the 20th century. In recent years, due to the increasing appeal towards micro power generation and energy recovery from wasted flows, this cost effective expander technology rose a renovated interest. In the present study, a 2D numerical model is realized and a design procedure of a Tesla turbine for ORC applications is proposed. A throughout optimization method is developed by evaluating the losses of each component. The 2D model results are further exploited through the development of 3D computational investigation, which allows an accurate comprehension of the flow characteristics. Finally, two prototypes are designed, realized and tested. The former one is designed to work with air as working fluid. The second prototype is designed to work with organic fluids. The achieved experimental results confirmed the validity and the large potential applicative chances of this emerging technology in the field of micro sizes, low inlet temperature and low expansion ratios.
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