Green Energy Storage for Better Gas Turbine Efficiency

2010 ◽  
Author(s):  
John T. Langaker
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Electric Power ◽  
Gas Turbine ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Power Grids ◽  
Energy Sources ◽  
Electric Power Grids

Everyone with green ambitions wants to see a full fleet of 100 percent renewable energy sources drive the world’s electric power grids. Until that happens, the next best solution integrates renewable energy generators with existing gas-fired power plants to improve their warmer-weather efficiency when generating on their larger scale by using methods of energy storage and distribution. Relatively clean burning on their own, large gas turbine generators are examples of proven opportunities to gain significant efficiency and recover output by using stored thermal energy to cool their inlet air when called to operate during hotter seasons of the year. Sustainable energy sources like wind and solar, which today generate in peaks and troughs that are hard to manage on electric power grids, beckon to be put into service for thermal energy storage instead of direct on-line grid interconnection. This article steps through the implementation of such storage.

scholarly journals The role of cool thermal energy storage (CTES) in the integration of renewable energy sources (RES) and peak load reduction

Energy ◽  
2012 ◽  
Vol 48 (1) ◽  
pp. 108-117 ◽  
Author(s):  
Marko Ban ◽  
Goran Krajačić ◽  
Marino Grozdek ◽  
Tonko Ćurko ◽  
Neven Duić
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Renewable Energy Sources ◽  
Peak Load ◽  
Energy Sources ◽  
Load Reduction

Design of a Modular Solid-Based Thermal Energy Storage for a Hybrid Compressed Air Energy Storage System

2016 ◽  
Author(s):  
Reza Baghaei Lakeh ◽  
Ian C. Villazana ◽  
Sammy Houssainy ◽  
Kevin R. Anderson ◽  
H. Pirouz Kavehpour
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Computational Study ◽  
Power Grid ◽  
Renewable Energy Sources ◽  
Compressed Air ◽  
Energy Sources ◽  
Compressed Air Energy Storage

The share of renewable energy sources in the power grid is showing an increasing trend world-wide. Most of the renewable energy sources are intermittent and have generation peaks that do not correlate with peak demand. The stability of the power grid is highly dependent on the balance between power generation and demand. Compressed Air Energy Storage (CAES) systems have been utilized to receive and store the electrical energy from the grid during off-peak hours and play the role of an auxiliary power plant during peak hours. Using Thermal Energy Storage (TES) systems with CAES technology is shown to increase the efficiency and reduce the cost of generated power. In this study, a modular solid-based TES system is designed to store thermal energy converted from grid power. The TES system stores the energy in the form of internal energy of the storage medium up to 900 K. A three-dimensional computational study using commercial software (ANSYS Fluent) was completed to test the performance of the modular design of the TES. It was shown that solid-state TES, using conventional concrete and an array of circular fins with embedded heaters, can be used for storing heat for a high temperature hybrid CAES (HTH-CAES) system.

scholarly journals Numerical simulation of the solar thermal energy storage system for domestic hot water supply located in south Spain

2013 ◽  
Vol 17 (2) ◽  
pp. 431-442 ◽  
Author(s):  
Ledesma Tores ◽  
Piotr Lapka ◽  
Roman Domański ◽  
Francisco Casares
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Packed Bed ◽  
Energy Storage System ◽  
Energy Sources ◽  
Thermal Energy Storage System

Nowadays, due to increase in energy consumption, a great deal of fossil fuels is being used. This latter is a consequence of the present environmental problems, such as global warming, acid rain, etc. In order to decrease these problems, the use of renewable energy sources is being promoted. But the renewable energy sources, particularly solar energy, present the drawback that there is a mismatch between the energy demand and supply. To cover this mismatch, the use of phase change thermal energy storage systems is required. In this work, the behavior of a packed bed latent heat thermal energy storage system cooperating with solar collector located in south Spain was analyzed by using a numerical method which based on Finite Volume discretization and Enthalpy Method. The model was validated by comparing obtained results with experimental data reported in the literature. The packed bed was composed of spherical capsules filled with phase change materials usable for a solar water heating system. The system was designed according to the conditions in the south Spain and by using commercial components available on the market. A series of numerical simulations were conducted applying meteorological data for several months in south Spain, particularly in M?laga.

Electricity sector development as a component of energy of Ukraine

2020 ◽  
Author(s):  
V.P. Glamazdin ◽  
O.V. Melnyk ◽  
V. M. Tonkogolosiuk
Keyword(s):  
Renewable Energy ◽  
Electric Power ◽  
Renewable Energy Sources ◽  
Electric Energy ◽  
Electric Power Industry ◽  
Green Energy ◽  
Electricity Sector ◽  
Energy Sources ◽  
Energy Market ◽  
Generation Structure

The study analyzed the current state and perspective directions of development of electric power complex of Ukraine. The problematic issues that have accumulated over many decades are highlighted. In particular, one of the main threats to the normal functioning of the electric power industry is a small proportion of maneuvering, peak and half-peak capacities. An analysis of the main events that took place during 2018-early 2020 in the electricity sector of Ukraine was conducted. The main tasks defined by the Energy Strategy of Ukraine for the period up to 2035 were considered. The analysis of legislative initiatives, in particular, requirements and improvement of the law “On Electric Energy Market”, the principles of work and basic requirements for the created Electricity Transmission System Operator was carried out. The reasons for the Guaranteed Buyer’s debt on electricity market to producers working at the “green” tariff have been determined. An analysis of the so-called “Gerus amendment” was carried out. This amendment allowed import of electricity from Russian Federation. The main threats to the introduction of market relations in a monopolized electric energy market were also identified. An analysis of the development of renewable energy sector was conducted. Since 2015, sector has increased its installed capacity from 701 megawatt to 5.4 gigawatt, or almost eight times. The main threats that can be realized with an increase in green energy capacities were analyzed. It was determined that the cost of supplying one kilowatt-hour of electric energy from renewable energy sources is much higher than from other sources. As a result of this, the share of energy from renewable energy sources in the tariff structure is many times higher than the share in the generation structure. A review of legislative innovations to limit the development of renewable energy sources was conducted.The article also analyzed data of the State Statistics Service of Ukraine regarding the dynamics of electricity prices for all categories of consumers, taking into account transportation and distribution services

scholarly journals Implementation of innovative projects using renewable energy sources in the fields of “future economy”

2020 ◽  
Vol 10 (3) ◽  
pp. 145-157
Author(s):  
Svіtlana Bondarenko ◽  
Iryna Perevozova ◽  
Tetiana Maksimenko
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
The State ◽  
Energy Sources ◽  
Tax Credit ◽  
Energy Storage Systems ◽  
Tax Benefits

The aim of the article is to study the implementation of innovative projects for the use of renewable energy sources in the “economy of the future”. According to the concept of “green" energy transition, the following areas of "economy of the future" are identified: energy efficient industry, buildings, heat energy; electric transport; circulating economy, waste reduction; support for research and innovation on electricity storage, production and storage of green hydrogen; digitalization and technological changes; renewable energy sources – wind, solar, bioenergy. It is proved that renewable energy sources can meet 80% growth in electricity demand over the next 10 years. By 2025, renewable energy sources will displace coal as the main means of electricity generation. If states adopt more aggressive policies, the role of renewable energy will be even more active in the next five years. It is proved that it is important to create an appropriate market environment to attract large-scale private investment in innovative renewable energy projects. After all, without sufficient investment, networks will be a weak link in the transformation of the electricity sector, which will affect the reliability and security of electricity supply. The transition to renewable energy sources in the general energy supply, including transport and heating, is most active in large cities. To transition the city to the “green” energy, the issues of attracting investment, changing consumer behavior, integration of electricity with heat supply and transport, the state of existing energy infrastructure (electricity, gas, heating networks), distribution of energy consumption between sectors (buildings, mobility) and players in supply (large energy companies, enterprises, cooperatives). The research of the basic tendencies of realization of projects of use of renewable energy sources in Ukraine is carried out. To ensure competitive conditions for the production of electricity from alternative energy sources, the introduction of incentive mechanisms and the installation of capacities for the accumulation of electricity at power plants is envisaged. Financial support for renewable energy at the state level is provided in two areas: tax benefits and credit support. Among the tax benefits and mechanisms in world practice are the following: investment tax credit; production tax credit; mechanism of partial or full compensation of interest for the use of loans by industrial companies and individual farms for the installation of energy storage systems; mechanism for exemption from taxation of imported equipment for energy storage systems, etc. However, Ukraine has not yet taken sufficient legislative and diplomatic steps to do so. Important are the problems of balancing the network, defaults and debts to market participants, the restructuring of the “green” tariff.

scholarly journals Ancillary Services Provided by Hybrid Residential Renewable Energy Systems through Thermal and Electrochemical Storage Systems

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2429 ◽  
Author(s):  
Lorenzo Bartolucci ◽  
Stefano Cordiner ◽  
Vincenzo Mulone ◽  
Marina Santarelli
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Heat Pump ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Load Factor ◽  
Ancillary Service ◽  
Hybrid Renewable Energy System

Energy Management System (EMS) optimal strategies have shown great potential to match the fluctuating energy production from renewables with an electric demand profile, which opens the way to a deeper penetration of renewable energy sources (RES) into the electric system. At a single building level, however, handling of different energy sources to fulfill both thermal and electric requirements is still a challenging task. The present work describes the potential of an EMS based on Model Predictive Control (MPC) strategies to both maximize the RES exploitation and serve as an ancillary service for the grid when a Heat Pump (HP) coupled with a Thermal Energy Storage (TES) is used in a residential Hybrid Renewable Energy System (HRES). Cost savings up to 30% as well as a reduction of the purchased energy unbalance with the grid (about 15%–20% depending on the season) have been achieved. Moreover, the thermal energy storage leads to a more efficient and reliable use of the Heat Pump by generally decreasing the load factor smoothing the power output. The proposed control strategy allows to have a more stable room temperature, with evident benefits also in terms of thermal comfort.

Modeling an Energy Storage System Based on a Hybrid Renewable Energy System in Stand-alone Applications

2017 ◽  
Vol 68 (11) ◽  
pp. 2641-2645
Author(s):  
Alexandru Ciocan ◽  
Ovidiu Mihai Balan ◽  
Mihaela Ramona Buga ◽  
Tudor Prisecaru ◽  
Mohand Tazerout
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Compressed Air ◽  
Energy Sources ◽  
Energy Storage Systems ◽  
Hybrid Renewable Energy System

The current paper presents an energy storage system that stores the excessive energy, provided by a hybrid system of renewable energy sources, in the form of compressed air and thermal heat. Using energy storage systems together with renewable energy sources represents a major challenge that could ensure the transition to a viable economic future and a decarbonized economy. Thermodynamic calculations are conducted to investigate the performance of such systems by using Matlab simulation tools. The results indicate the values of primary and global efficiencies for various operating scenarios for the energy storage systems which use compressed air as medium storage, and shows that these could be very effective systems, proving the possibility to supply to the final user three types of energy: electricity, heat and cold function of his needs.

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