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    Technology Roadmap for High Altitude Airship, Based on Conceptual Design of an Airship System

    , M.Sc. Thesis Sharif University of Technology Mohajerin Esfahani, Payam (Author) ; Mazaheri, Karim (Supervisor)
    The main focus of this project is to define necessary technologies in design and production of a high altitude airship and provide a roadmap that show how appropriate actions can be conducted toward technology, product and market in the next ten years in Iran. Here, we have surveyed the role of design parameters in the performance of high altitude airship. In the sequel according to the specific final mission, the required technologies and infrastructures are defined.The case of airship technology acquisition for Iran basically can be adapted to the “Technology Catchup”. Hence, we propose a new methodology to provide a technology roadmap with the “technology catchup” approach, then develop... 

    Turboexpander Technology Development Model and Display Roadmap for Pressure Reducing System based Energy Recovery by Turboexpander

    , M.Sc. Thesis Sharif University of Technology Ramezani, Roohollah (Author) ; Saboohi, Yadollah (Supervisor)
    High pressure natural gas is transported from processing plants to end users via a network of natural gas system. Pressure reduction along the transport system is compensated in compressor stations. High pressure natural gas flows in to distribution network in demand center which operates at medium pressure. Medium pressure gas is transferred to end users who can use natural gas with low pressure. Therefore, pressure of natural gas is reduced consequently when gas flows from transport systems to distribution network and end users. Work is dissipated during pressure reduction which otherwise could be converted in to power.A technology that could be utilized for conversion of pressure work in...