scholarly journals Simulation of an Advanced Geothermal Energy Conversion Plant in Perú

2021 ◽  
pp. 205-222
Author(s):  
Sofia Chauca Paredes ◽  
Graciela Rojas García ◽  
George Porto Power
Keyword(s):  
Energy Conversion ◽  
High Efficiency ◽  
Flow Diagram ◽  
Detailed Model ◽  
Power Cycles ◽  
Hybrid Energy ◽  
Hybrid Solution ◽  
Energy Conversion System ◽  
Primary Cycle ◽  
Ideal Process

This investigation aims to simulate an efficient plant that generates energy through a solar-geothermal hybrid energy conversion system with supercritical steam, Therminol VP1, geothermal fluid and R134a refrigerant. The goal is to exemplify a hybrid solution that optimizes and takes advantage of the existing  properties of the solar and geothermal power cycles. The geothermal part of the process, the primary cycle, is augmented by the solar thermal cycle to obtain a high-efficiency result. In addition, it allows the reader to understand the ideal process of this type of plant and a thermodynamic analysis represented by creating a detailed model block flow diagram, which is then turned into a dynamic one used to examine the selected parameters such as temperature, flow rate, and pressure variations. The dynamic model approximated the thermal values of the heat exchangers and the working fluids in the exchangers, solar collectors, piping and in the storage tanks.

scholarly journals Modeling and Coordinated Control Strategy of Large Scale Grid-Connected Wind/Photovoltaic/Energy Storage Hybrid Energy Conversion System

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Lingguo Kong ◽  
Guowei Cai ◽  
Sidney Xue ◽  
Shaohua Li
Keyword(s):  
Energy Storage ◽  
Energy Conversion ◽  
Hybrid System ◽  
Control Strategy ◽  
Large Scale ◽  
Coordinated Control ◽  
Hybrid Energy ◽  
Conversion System ◽  
Energy Conversion System ◽  
Continuous Power

An AC-linked large scale wind/photovoltaic (PV)/energy storage (ES) hybrid energy conversion system for grid-connected application was proposed in this paper. Wind energy conversion system (WECS) and PV generation system are the primary power sources of the hybrid system. The ES system, including battery and fuel cell (FC), is used as a backup and a power regulation unit to ensure continuous power supply and to take care of the intermittent nature of wind and photovoltaic resources. Static synchronous compensator (STATCOM) is employed to support the AC-linked bus voltage and improve low voltage ride through (LVRT) capability of the proposed system. An overall power coordinated control strategy is designed to manage real-power and reactive-power flows among the different energy sources, the storage unit, and the STATCOM system in the hybrid system. A simulation case study carried out on Western System Coordinating Council (WSCC) 3-machine 9-bus test system for the large scale hybrid energy conversion system has been developed using the DIgSILENT/Power Factory software platform. The hybrid system performance under different scenarios has been verified by simulation studies using practical load demand profiles and real weather data.

scholarly journals Ru catalyst supported on nitrogen-doped nanotubes as high efficiency electrocatalysts for hydrogen evolution in alkaline media

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22297-22303
Author(s):  
Qinglei Liu ◽  
Lehao Yang ◽  
Peng Sun ◽  
Haigang Liu ◽  
Jiahua Zhao ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Hydrogen Evolution ◽  
Potential Application ◽  
High Efficiency ◽  
Alkaline Media ◽  
Ru Catalyst ◽  
Nitrogen Doped ◽  
Conversion System ◽  
Energy Conversion System ◽  
Increasing Demand

Due to the potential application in the future energy conversion system, there is an increasing demand for efficient, stable and cheap platinum-free catalysts for hydrogen evolution.

scholarly journals A Wind Energy Conversion System Based on a Generator with Modulated Magnetic Flux

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3285
Author(s):  
Michał Gwóźdź ◽  
Michał Krystkowiak ◽  
Łukasz Ciepliński ◽  
Ryszard Strzelecki
Keyword(s):  
Magnetic Flux ◽  
Wind Energy ◽  
Energy Conversion ◽  
High Efficiency ◽  
Synchronous Generator ◽  
Voltage Source ◽  
Magnetomotive Force ◽  
Conversion System ◽  
Energy Conversion System ◽  
Power Electronics Converter

In this work, the concept of an energy conversion system for wind turbines based on the modified permanent magnet synchronous generator (PMSG) is presented. In the generator, a pair of three-phase windings is used, one of which is connected in a “star” and the second in a “delta” configuration. At the outputs of both windings, two six-pulse uncontrolled (diode) rectifiers are included. These rectifiers are mutually coupled by a specially designed pulse transformer, whose primary winding is powered by the power electronics converter—the so-called “current modulator”—which, in this case, operates as a magnetic flux modulator, in the generator. The modulator provides a quasi-sinusoidal magnetomotive force (mmf) in the stator of the machine. The whole system is connected to the power grid via a dedicated voltage source inverter (VSI) converter. The main objective of the elaborated solution is to provide high efficiency conversion of mechanical (wind) energy into electricity by means of a relatively simple electrical system.

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