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- Journal Article:
Adiputra and Utsunomiya
Cold-water pipe (CWP) is a novel, most-challenging component of Ocean Thermal Energy Conversion (OTEC) floating structure which is installed to transport the deep seawater to the board. For commercial scale, the transported seawater flow rate will be in the order of 102 m3/s. This large amount of internal flow may trigger instability which leads to the failure of CWP.…
- Journal Article:
Zitti et al.
The aim of designing a new hydrokinetic turbine simple, cheap, environmentally friendly and suitable for installation in remote areas is pursued by studying the efficiency of an Archimedes turbine that exploits the kinetic energy of a water stream rather than an upstream-downstream difference in water head. First, the efficiency of a hydrokinetic Archimedes turbine has been studied using…
- Conference Paper:
Pool et al.
In this project, the design of a new variant of OTEC called OTWEC (Ocean Thermal-Water Energy Conversion) is being developed. It operates based on the Rankine cycle and can produce desalinated water and electrical energy using the thermal gradient between a geothermal anomaly and seawater. The municipality of Ensenada faces water scarcity issues, and energy demand projections exceed the…
- Journal Article:
Rorres
The geometry of an Archimedes screw is governed by certain external parameters (its outer radius, length, and slope) and certain internal parameters (its inner radius, number of blades, and the pitch of the blades). The external parameters are usually determined by the location of the screw and how much water is to be lifted. The internal parameters, however, are free to be chosen to optimize…
- Journal Article:
Erinofiardi et al.
Potential energy from fluid flow of small rivers or irrigations could be extracted become electricity by using screw turbine. This turbine is promising because the advantages of ultra-low head and fish friendly.Experimental performance of screw turbine for ultra-low head hydro resource is presented in this paper. The screw turbine with anoutside diameter of 142 mm and the water flowrate of 1.2…
- Journal Article:
Stergiopoulou and Kalkani
The present paper presents the preliminary investigation of the hydrodynamic behavior of Archimedean hydropower turbines, with inclined and horizontal axis, for the exploitation of the low-head hydraulic energy and the kinetic energy of natural and artificial watercourses, including coastal and tidal currents. By using the similarity theory, some experimental cochlear rotors have been…
- Journal Article:
Shahverdi et al.
Archimedes screw turbines have gained popularity in generating power from flowing water. One aspect that hasn't been considered yet is optimizing those parameters that are considered assumptions in the prediction models. In this research, a simple procedure was introduced to design an appropriate Archimedes screw turbine for a given site using a prediction model and an optimization model.…
- Journal Article:
Bouvant et al.
In this study, the performance of an Archimedes screw turbine (AST), in terms of the power coefficient (CP), was evaluated. The design parameters, including the inner and the outer diameter (Di and Do, respectively), the axle length (L), the blade inclination with respect to the longitudinal axis of the screw (α) and the blade stride (p), were…
- Journal Article:
Zhang et al.
Aiming to prolong the duration of detection equipment deployed in deep water, a new type of hydrokinetic turbine with good self-starting ability should be developed to harness low-speed current energy in such deep-water scenarios. In this study, a novel ductless Archimedes screw turbine is proposed to improve the system’s startup performance for low-speed current applications. An…
- Conference Paper:
Lewis et al.
A 165 kWe Open-Cycle Ocean Thermal Energy Conversion (OTEC) experiment is planned to be conducted through cost-shared projects between the U.S. Department of Energy and the Pacific International Center for High Technology Research at the Natural Energy Laboratory of Hawaii (NELH), Keahole, North Kona, Hawaii. The objective is to obtain experimental data under prototypical seawater conditions…
- Journal Article:
Ma et al.
The present paper deals with the performance analysis of an ocean thermal energy conversion (OTEC) plant based on the organic Rankine cycle (ORC) with a theoretical outpower of 100 kW where a non-azeotropic mixture has been used as the working fluid. Hydrofluoroolefins (HFOs) are selected as the components of the binary non-azeotropic working fluid due to their desired…
- Journal Article:
Geng and Gao
For isolated islands and remote coastal and offshore areas, a multi-generation system based on ocean thermal energy conversion (OTEC) is one promising solution for electricity and water supply since it can exploit seawater resource and ocean thermal energy (OTE) simultaneously. In order to further improve the energy utilization efficiency, this paper proposes a novel combined…
- Journal Article:
Badawy et al.
River current energy is regarded as one of the most environmentally friendly sources of electricity. Because it doesn't produce power by holding water in a reservoir and causing a height differential, a river current (or hydrokinetic) device is not a dam. Turbines placed inside rivers immediately harvest the kinetic energy of flowing water. Like Egypt's river Nile can be used to study this…
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