Energies | Free Full-Text | Study on the Characteristics of Expander …

Abstract: The circulation pump in an organic Rankine cycle (ORC) increases the pressure of the liquid working fluid from low condensing pressure to high evaporating pressure, and the expander utilizes the pressure difference to generate work. A portion of the expander output power is used to offset the consumed pumping work, and the rest of the expander power is exactly the net work produced by the ORC system. Because of the relatively great theoretical pumping work and very low efficiency of the circulation pump reported in previous papers, the characteristics of the expander power used for offsetting the pumping work need serious consideration. In particular, the present work examines those characteristics. It is found that the characteristics of the expander power used for offsetting the pumping work are satisfactory only under the condition that the working fluid absorbs sufficient heat in the evaporator and its specific volume at the evaporator outlet is larger than or equal to a threshold value.

Source: www.mdpi.com

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The microturbine – Rotating reduction

Would you like to rationalize your production? Make profit by installing the modern steam turbines. Contact G-team a.s. We offer the best fit solution, based on your personal demands and conditions in your place of operations.

Source: www.slideshare.net

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100 Percent Renewable Energy Sources Supply Strategy for Small Island Developing States

100 Percent Renewable Energy Sources Supply Strategy for Small Island Developing States Andrew Williams Jr Email: aj@trn.tv Mobile: +1-424-222-1997 Skype: andrew.williams.jr http://twitter.com/AWilliamsJr http://xeeme.com/AmbassadorAWJ https://www.facebook.com/FAUBermuda...

Source: www.slideshare.net

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All-in-one energy system offers greener power for off-grid homes, farms – Nanowerk

All-in-one energy system offers greener power for off-grid homes, farms Nanowerk Background. The three-and-a-half-year project ‘Biofuel Microgeneration with Cryogenic Energy Storage’ has received total EPSRC funding of just over £1.13 million.

Source: www.nanowerk.com

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Automatic Generation Control of an Organic Rankine Cycle Solar–Thermal/Wind–Diesel Hybrid Energy System

The organic Rankine cycle solar–thermal power system is a promising concept for the distributed energy market. The present work investigates the automatic generation control of an autonomous hybrid energy system based on organic Rankine cycle solar–thermal technology. Any mismatch between the active power generation and consumption in the hybrid energy system manifests itself as a frequency deviation from the nominal system frequency. To confront the frequency excursion problem, the present work considers automatic generation control, in which the controllers’ parameters are optimized by using particle swarm optimization (PSO). The performance of each controller is compared with its genetic algorithm (GA)-optimized counterpart with respect to its ability to capture the frequency variation in the proposed hybrid energy system. The simulation results reveal that the performance of the PSO-optimized controller is better than its GA-optimized counterpart in terms of settling time and overshoot in deviation of frequency.

Source: scienceindex.com

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