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    The Design and Construction of a Marine Current Turbine and Modeling the Flow Around It

    , M.Sc. Thesis Sharif University of Technology Nikkhah, Ehsan (Author) ; Seif, Mohammad Saeed (Supervisor) ; Abbaspour, Madjid (Supervisor)
    Nowadays, science and technology, once again, lead approach to renewable natural resources to access energy due to fossil resources restrictions. Growing need for energy, being concerned about exhaustion of fossil resources, environmental pollution caused by burning fossil materials, climate warming and the greenhouse effect and etc. are obvious evidences of aforesaid fact. On the other hand, oceans and seas are large reservoirs of energy which comes from sunlight, geothermal resources, Earth's rotation and gravity by means of mechanical and hydrothermal processes. During the years, many ideas were conducted to achieve and mine the mentioned enormous energy potential of the oceans and seas.... 

    Design of a hybrid Ocean Thermal Energy Conversion with Solar Thermal Energy (OTEC-STE) system for energy production(case study: Oman sea region)

    , M.Sc. Thesis Sharif University of Technology Zakipour, Mohammad Mehdi (Author) ; Abbaspour Tehrani Fard, Majid (Supervisor)
    The ocean thermal energy conversion system is one of a variety of renewable marine energy that is made up of a thermodynamic cycle, and it uses the difference between the temperature of hot water at the ocean surface and cold water at the depths of the ocean to generate electricity. The closed cycle is one type in which the system uses a working fluid which its boiling point less than the boiling point of water. Increasing the temperature of the fluid inlet in the cycle increases the system efficiency, which has been applied in this study to increase the efficiency of the OTEC system. The required energy to increase this temperature has been achieved by adding a solar collector to this... 

    A low cost Hydrokinetic Wells turbine system for oceanic surface waves energy harvesting

    , Article Renewable Energy ; Volume 156 , 2020 , Pages 610-623 Valizadeh, R ; Abbaspour, M ; Taeibi Rahni, M ; Sharif University of Technology
    Elsevier Ltd  2020
    This paper provides a feasibility study on a low cost system called Hydrokinetic Wells turbine for surface wave energy conversion without using plenum chambers. The elimination of the plenum chamber and its complicated valve systems can reduce the expenses of wave energy conversion up to 23%.The feasibility process were done for high and low frequency conditions. For the low frequency waves, we offer the 300 rpm angular velocity as an optimum selection for further studies. For the high frequency condition a reliable analytical approach based on validated methods was developed. The analytical results indicate that a wells turbine with 60 cm diameter could produce up to 1600 Watts power in...