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.

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.

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.

scholarly journals Thermal energy storage – overview and specific insight into nitrate salts for sensible and latent heat storage

2015 ◽  
Vol 6 ◽  
pp. 1487-1497 ◽  
Author(s):  
Nicole Pfleger ◽  
Thomas Bauer ◽  
Claudia Martin ◽  
Markus Eck ◽  
Antje Wörner
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Waste Heat ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Latent Heat Storage ◽  
Decomposition Processes ◽  
Nitrate Salts ◽  
Salt Systems

Thermal energy storage (TES) is capable to reduce the demand of conventional energy sources for two reasons: First, they prevent the mismatch between the energy supply and the power demand when generating electricity from renewable energy sources. Second, utilization of waste heat in industrial processes by thermal energy storage reduces the final energy consumption. This review focuses mainly on material aspects of alkali nitrate salts. They include thermal properties, thermal decomposition processes as well as a new method to develop optimized salt systems.

scholarly journals Optimal Selection of Thermal Energy Storage Technology for Fossil-Free Steam Production in the Processing Industry

2021 ◽  
Vol 11 (3) ◽  
pp. 1063
Author(s):  
Anton Beck ◽  
Alexis Sevault ◽  
Gerwin Drexler-Schmid ◽  
Michael Schöny ◽  
Hanne Kauko
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Renewable Energy Sources ◽  
Continuous Production ◽  
Advantages And Disadvantages ◽  
Storage Technology ◽  
Energy Storage Technology ◽  
Storage Technologies

Due to increased share of fluctuating renewable energy sources in future decarbonized, electricity-driven energy systems, participating in the electricity markets yields the potential for industry to reduce its energy costs and emissions. A key enabling technology is thermal energy storage combined with power-to-heat technologies, allowing the industries to shift their energy demands to periods with low electricity prices. This paper presents an optimization-based method which helps to select and dimension the cost-optimal thermal energy storage technology for a given industrial steam process. The storage technologies considered in this work are latent heat thermal energy storage, Ruths steam storage, molten salt storage and sensible concrete storage. Due to their individual advantages and disadvantages, the applicability of these storage technologies strongly depends on the process requirements. The proposed method is based on mathematical programming and simplified transient simulations and is demonstrated using different scenarios for energy prices, i.e., various types of renewable energy generation, and varying heat demand, e.g., due to batch operation or non-continuous production.

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.

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