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This paper briefly introduces the application of DCS in a blast furnace TRT. The process basic scheme, configuration of the control system and its main functions are described. The master, controller and control net are reduplicated on purpose to improve the reliability of the control system, When TRT trips, one of the valves group for reducing gas pressure is opened fast to avoid the increase of...
The robotic buoy which is a mobile mooringless buoy and keeps position autonomously against ocean current.[1][2][3] The robotic buoy is specialized for operating on an environment where is too deep to anchor for mooring, like middle of an ocean. The robotic buoy is compose of two systems, propulsion system and energy harvesting system. ‘Wave Turbine’ is a PTO(Power take-off)[4] to harvest oceanic...
This paper presents the validation of a MPPT technique, based on a Growing Neural Gas (GNG) network, for high performance marine current generator with induction machine, in presence of torque oscillations caused by time and space variation of the turbine operating conditions. The unsteady torque delivered by a notional turbine working in the presence of waves and of sea bottom boundary layer is obtained...
The generator's prime mover is susceptible to abnormal frequency operation, and turbine blade fatigue is the main concern. As blade fatigue is cumulative and non-reversible, the turbine abnormal frequency protection should govern the duration of abnormal frequency operation and thus limiting the possibility of turbine damage. This turbine protection is acting as backup protection for the generator...
The paper presents the “run of the river” Small Hydropower Plant as an individual supplier whose aim is to reduce the amount of energy used by a consumer from a power system. The analyzed object consists of two propeller turbines, PM synchronous generators and power electronic units. Application of a variable speed operation provides a wide range of power generation. Moreover, the power electronic...
The Combinator is an important part in Kaplan turbine control. It ensures that the turbine will operate in an optimum way, in terms of maximum efficiency of the plant. This work suggests a new sinusoidal perturbation based extremum seeking algorithm based on the phasor of the output. We propose to use this algorithm for generating the required data to build and correct the combinator. Simulations...
The present turbine relates to renewable energy in particular to the field of small-scale power. The unit is designed to maximize energy conversion of flowing water energy into electrical one without the construction of hydraulic structures (dams, levees, foundations) with possible applications on various rivers in all seasons — rivers with ice-covering during the winter, as hydroelectric power plant...
This paper considers the design of a high efficiency small-size generator for micro-hydroelectric energy production. Different generator designs are compared in order to identify the best solution to be adopted in such installations. Due to the small power rating, the same generator is considered in different installations, with different net heads and water flow. This allows to improve the cost-effectiveness...
Ocean waves are a huge, largely unexploited energy resource, and the potential for extracting energy from waves is great. Research in this area is driven by the need to meet renewable energy targets, but it is relatively immature compared to other renewable energy technologies. This brief review introduces some device types that represent the state of the art of Oscillating Water Column (OWC) technologies,...
Mitigation of climate change has stimulated an increased penetration of renewable generation into electricity grids. A substantial amount of the future energy mix is projected to come from renewable sources such as offshore wind, but marine energy may be an important contributor due to the great potential of wave and tidal stream generation. Wind and tidal stream turbines feature similarities: electric...
Electrical power is stipulation of human life. Now-a-days electricity is produced from number of sources like hydraulic energy, coal, steam, wind stream and nuclear power etc. Electricity generated by hydraulic power is cheapest and environment friendly. A large dam is mandatory to generate power in megawatt (MW), to build enormous dams need of large capital cost and hefty land reforms but renewable...
Microhydel power plants are gaining importance in recent years due to the limited availability of fossil fuels and the increasing concerns about the environmental impact due to their use. Large hydro-power sources have almost been fully tapped, and there are concerns about adverse effects on the environment that stand in the way of commissioning of new large scale projects. As the contribution from...
This study presents the research and develop of a Coaxial Pipe Flow Generator. Modern engineering tools such as Computational Fluid Dynamics (CFD) software and Rapid Prototyping (RP) technology were utilized to facilitate the numerical and experimental studies. The CFD numerical simulations consisted of three-dimensional steady state analyses. The simulations were performed to optimize blade shapes...
This paper presents a new concept of a Small Hydropower Plant (SHP) with a Permanent Magnet Synchronous Generator (PMSG). This new solution has a Propeller Turbine (PT) integrated with the PMSG. The turbine operates at variable speed and therefore the generator produces voltages at variable magnitude and frequency. For that reason the generated energy has to be converted by a Power Electronics Unit...
Solid Oxide Fuel Cell (SOFC) and Gas Turbine (GT) hybrid systems have been widely studied in recent years as a promising alternative power sources for various applications. The fundamental concept of this system is combining a GT with the SOFC system to recuperate the energy left in the SOFC exhaust, thereby improving the overall system efficiency. However, because of the coupling dynamics between...
Based with the known parameters, the plan of mud turbine generator for mine is optimized. The optimal turbines are designed and simulated. The performance curves of shaft power, pressure drop and efficiency to rotate speed are obtained separately. The performance of the designed mud turbine is insured to meet the requirements. The performance experiments are carried on the prototype of mud turbine...
The retrofit of flow passage of a steam turbine is a feasible measure of save energy and capacity enlargement of a unit and the ROI (return on investment) is high. The economics of retrofitted units is related to many factors. This paper analyzes the economic indicators of a 300WM steam turbine flow passage retrofit, as payback period, FNPV (Financial Net Present Value) and FIRR (financial Internal...
Power generation characteristics of a horizontal tidal current power generation system have been investigated. At first, a model test had been carried out at laboratory level for finding more optimal shapes of the turbine of the generation system. Secondly, two tests had been carried out for two model sizes (medium size: 1.2m × 0.65m, large size: 6.0m × 3.0m). In the laboratory test, the constructed...
This paper details an innovative design for a wave energy harvester that converts the heaving motion of waves into electrical power. The conceptual design utilizes a unique bi-directional turbine system that develops a torque in a given direction, independent of whether the fluid is moving upward or downward. The result is power production both as the buoy is heaved upward by a wave as well as while...
Nowadays, problem of decreasing source of natural gas fuel is well known. It is quite alarming since that it will increase makes the fuel cost for Gas Turbine power plant usage. Hence, a new technology called the Compressed Air Energy Storage System (CAES) is created. The main concept of this system is the use off-peak power to pressurize air into an underground reservoir, which is then released during...
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