scholarly journals Storage Gravitational Energy for Small Scale Industrial and Residential Applications

Inventions ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 64 ◽  
Author(s):  
Ana Cristina Ruoso ◽  
Nattan Roberto Caetano ◽  
Luiz Alberto Oliveira Rocha
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Short Interval ◽  
Photovoltaic Cells ◽  
Electric Energy ◽  
Gravitational Energy ◽  
Gravitational Potential Energy ◽  
Small Scale ◽  
Stable Form ◽  
High Demand

Photovoltaic cells produce electric energy in a short interval during a period of low demand and show high levels of intermittency. One of the well-known solutions is to store the energy and convert it into a more stable form, to transform again into electricity during periods of high demand, in which the energy has a higher value. This process provides economic viability for most energy-storage projects, even for the least efficient and most common, such as batteries. Therefore, this paper aims to propose a storage system that operates with gravitational potential energy, considering a small-scale use. The development of this methodology presents the mathematical modeling of the system and compares the main characteristics with other systems. The dimensions of the considered system are 12-m shaft, 5-m piston height, and 4 m of diameter; it presented an energy storage of 11 kWh. Also, it has an efficiency of about 90%, a lifetime of 50 years, and higher storage densities compared to other systems.

scholarly journals Parametric Optimisation of a Trigenerative Small Scale Compressed Air Energy Storage System

Proceedings ◽  
2019 ◽  
Vol 23 (1) ◽  
pp. 5
Author(s):  
Mohamad Cheayb ◽  
Sébastien Poncet ◽  
Mylène Marin-Gallego ◽  
Mohand Tazerout
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Electric Energy ◽  
Optimal Solution ◽  
Energy Storage System ◽  
Compressed Air ◽  
Design Parameters ◽  
Small Scale ◽  
Compressed Air Energy Storage ◽  
Study Results

Recently, major improvement on compressed air energy storage technology has been made by using the heat of compression for heating energy or using it to preheat the compressed air in the expansion phase and by demonstrating its ability to produce cooling energy. Thus, the trigenerative compressed air energy storage has been introduced. In this paper, we introduce a configuration of trigenerative compressed air energy storage system giving the preference to the electric energy production. The study then focuses on undertaking an optimization study via a parametric analysis considering the mutual effects of parameters. This analysis is applied to a micro-scale application including the existing technological aspects. The parametric study results applied on the hot temperature of the thermal energy storage indicate the possibility to find an optimal solution as a trade-off between system performances and other parameters reflecting its cost. On the contrary, the selection of the maximal storage pressure cannot be achieved by finding a compromise between energy density and system efficiency. A complete study of other design parameters will be addressed in a future publication.

Exergy analysis of a small-scale trigenerative compressed air energy storage system

2021 ◽  
pp. 193-226
Author(s):  
Raghuveera Sai Sarath Dittakavi ◽  
David S-K. Ting ◽  
Rupp Carriveau ◽  
Mehdi Ebrahimi
Keyword(s):  
Energy Storage ◽  
Exergy Analysis ◽  
Storage System ◽  
Energy Storage System ◽  
Compressed Air ◽  
Small Scale ◽  
Compressed Air Energy Storage

Storage Options and Sizing for Utility Scale Integration of Wind Energy Plants

Solar Energy ◽  
2005 ◽  
Author(s):  
Allan E. Ingram
Keyword(s):  
Energy Storage ◽  
Wind Energy ◽  
Storage System ◽  
Electric Energy ◽  
Time Frame ◽  
Market Prices ◽  
Electric Energy Storage ◽  
Design Engineers ◽  
Scale Integration ◽  
Utility Scale

Electric energy storage has been discussed as an option for increasing the marketability of wind energy facilities by reducing output variation. Utility scale wind plants face economic exposure to tariff charges for output variation as well as depending on volatile market prices for success. Wind speed variability and associated changes in wind plant output raise specific challenges to design engineers sizing electric energy storage systems. Evaluation of prospective Wind/Storage applications depends on the characteristics of individual wind plant output and the choice of storage technology. Energy storage options range from traditional lead acid batteries and pumped hydro storage to recently commercialized electrochemical flow battery systems. Selection and sizing of energy storage for wind plants vary with the time frame for each application. Different time frames correspond with the utility definitions of regulation, load shaping and load factoring. Results from a storage system model are presented that differentiate appropriate storage system sizes for these applications.

scholarly journals Real-Time Energy Management for a Small Scale PV-Battery Microgrid: Modeling, Design, and Experimental Verification

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2712 ◽  
Author(s):  
Mahmoud Elkazaz ◽  
Mark Sumner ◽  
David Thomas
Keyword(s):  
Energy Storage ◽  
Real Time ◽  
Energy Management ◽  
Storage System ◽  
Reference Value ◽  
Energy Storage System ◽  
Small Scale ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Battery Energy

A new energy management system (EMS) is presented for small scale microgrids (MGs). The proposed EMS focuses on minimizing the daily cost of the energy drawn by the MG from the main electrical grid and increasing the self-consumption of local renewable energy resources (RES). This is achieved by determining the appropriate reference value for the power drawn from the main grid and forcing the MG to accurately follow this value by controlling a battery energy storage system. A mixed integer linear programming algorithm determines this reference value considering a time-of-use tariff and short-term forecasting of generation and consumption. A real-time predictive controller is used to control the battery energy storage system to follow this reference value. The results obtained show the capability of the proposed EMS to lower the daily operating costs for the MG customers. Experimental studies on a laboratory-based MG have been implemented to demonstrate that the proposed EMS can be implemented in a realistic environment.

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