A Generic Algorithm for Planning the Year-Round Solar Energy Harvest/Storage to Supply Solar-Based Stable Power

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Yasir M. Alfulayyih ◽  
Peiwen Li ◽  
Ammar Omar Gwesha
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Power Supply ◽  
Energy Demand ◽  
Storage System ◽  
Electrical Power ◽  
Electrical Energy ◽  
Energy Harvest ◽  
Time Interval ◽  
Worst Case

Abstract An algorithm and modeling are developed to make precise planning of year-round solar energy (SE) collection, storage, and redistribution to meet a decided demand of electrical power fully relying on solar energy. The model takes the past 10 years’ data of average and worst-case sky coverage (clouds fraction) condition of a location at a time interval (window) of per 6 min in every day to predict solar energy and electrical energy harvest. The electrical energy obtained from solar energy in sunny times must meet the instantaneous energy demand and also the need for energy storage for nighttime and overcast days, so that no single day will have a shortage of energy supply in the entire year and yearly cycles. The analysis can eventually determine a best starting date of operation, a least solar collection area, and a least energy storage capacity for cost-effectiveness of the system. The algorithm provides a fundamental tool for the design of a general renewable energy harvest and storage system for non-interrupted year-round power supply. As an example, the algorithm was applied for the authors’ local city, Tucson, Arizona of the U.S. for a steady power supply of 1 MW.

scholarly journals Analysis of Energy Storage Implementation on Dynamically Positioned Vessels

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 444
Author(s):  
Aleksandar Cuculić ◽  
Dubravko Vučetić ◽  
Rene Prenc ◽  
Jasmin Ćelić
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Large Scale ◽  
Evaluation Model ◽  
Storage System ◽  
Electrical Power ◽  
Maritime Transportation ◽  
Time Interval ◽  
Electrical Power System ◽  
Worst Case

Blackout prevention on dynamically positioned vessels during closed bus bar operation, which allows more efficient and eco-friendly operation of main diesel generators, is the subject of numerous studies. Developed solutions rely mostly on the ability of propulsion frequency converters to limit the power flow from the grid to propulsion motors almost instantly, which reduces available torque until the power system is fully restored after failure. In this paper, a different approach is presented where large scale energy storage is used to take part of the load during the time interval from failure of one of the generators until the synchronization and loading of a stand-by generator. In order to analyze power system behavior during the worst case fault scenario and peak power situations, and to determine the required parameters of the energy storage system, a dynamic simulation model of a ship electrical power system is used. It is concluded that implementation of large scale energy storage can increase the stability and reliability of a vessel’s electrical power system without the need for the reduction of propulsion power during a fault. Based on parameters obtained from simulations, existing energy storage systems were evaluated, and the possibility of their implementation in the maritime transportation sector was considered. Finally, an evaluation model of energy storage implementation cost-effectiveness was presented.

scholarly journals Compressed Air Energy Storage Installation for Renewable Energy Generation

2019 ◽  
Vol 112 ◽  
pp. 02010
Author(s):  
Claudia Borzea ◽  
Iulian Vlăducă ◽  
Dan Ionescu ◽  
Valentin Petrescu ◽  
Filip Niculescu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Demand ◽  
Electrical Power ◽  
Electrical Energy ◽  
Compressed Air ◽  
Compressed Air Energy Storage ◽  
Electrical Grid ◽  
Air Supply ◽  
Asynchronous Generator ◽  
Renewable Energy Generation

Compressed Air Energy Storage (CAES) installations are used for storing electrical power, under the form of potential energy from compressed air. The heat generated during compression can be stored to improve the efficiency of compression-expansion cycle. The solution presented consists of a 100 kW screw compressor driven by a 110 kW asynchronous three-phase motor. The compressor supplies air into vessels which store it until a high electrical energy demand arises. At that time, the compressed air is released into a 132 kW screw expander whose shaft spins a 132 kW asynchronous generator, producing electric power and supplying it into the electrical grid. Before expansion, the air must be preheated in order to avoid the freezing of expansion equipment. If the heat generated during compression is used for air preheating before expansion, the process is adiabatic. A demonstrative model of the installation is currently being developed, with the expander part being completed so far. The maximum power to be produced was calculated to be around 100 kW. During expander commissioning tests with air supply from a 250 kW high pressure compressor, a maximum generated power of 49.7 kW was attained, expected to be higher when releasing air from the reservoirs.

The Utilization of Ground Surroundings for Seasonal Solar Energy Storage

2016 ◽  
Author(s):  
Bernd Weber ◽  
Eduardo Solís Figueroa ◽  
M. Dolores Durán García ◽  
Iván G. Martínez Cienfuegos ◽  
Eduardo A. Rincón-Mejía
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Thermal Energy ◽  
Energy Demand ◽  
Storage Tank ◽  
Energy Transport ◽  
Storage System ◽  
Limiting Factor ◽  
Soil Storage ◽  
Summer Temperatures

In European countries seasonal thermal energy storage is an emergent task due to availability of solar energy in summer and thermal energy demand in winter. In this study the performance of an uninsulated buried storage tank is analyzed. Summer temperatures reached 45 °C in the storage tank and 22 °C in the soil, 1 m from the tank shell. Wintertime temperature of the storage tank dropped to 8 °C, near the freezing limit of the heat pump, and soil cooled down to 9 °C. While in wintertime heat transfer from earth to water was the limiting factor, a summertime temperature difference of more than 20 °C allowed enough energy transport to charge the soil storage system. An analytical model showed that more than 50% of the solar energy stored could be recovered by this application.

Rancang Bangun Mekanisme Fess Sebagai Alat Pembanding Pengaruh Geometri Flywheel Terhadap Energi Kinetik Yang Dihasilkan

2019 ◽  
Vol 8 (02) ◽  
pp. 1-6
Author(s):  
Adhe Anggry ◽  
Yuli Dharta ◽  
Andri Wiguna ◽  
Armada Armada ◽  
Ririn Martasari
Keyword(s):  
Free Energy ◽  
Energy Storage ◽  
Kinetic Energy ◽  
Specific Energy ◽  
Mechanical Energy ◽  
Storage System ◽  
Electrical Power ◽  
Electrical Energy ◽  
Energy Storage System ◽  
Tidal Power

Recent days, more and more people are becoming interested in "free-energy". "Free-energy" means the energy sources used freely without to pay. The sources of "free-energy" are sunlight, rainfall, wind energy, wave power, and tidal power. There are other sources of power such as gravity, electrical charge in the atmosphere and ionosphere, and a mass. FESS (Flywheel Energy Storage System) is an attempt to store kinetic energy generated from the rotation flywheel in which the electrical power output from the generator as an input to the motor. Mass flywheel greatly affects the amount of power generated by a generator which will serve as a flywheel device or distributors of energy while at the induction generator to eventually convert mechanical energy into electrical energy and vice versa. In this system design becomes very important for the flywheel can store the kinetic energy. This research aims to design and build mechanisms as a means of comparison FESS flywheel effect of the geometry of the kinetic energy generated. The research method is done by making three different geometric design flywheels, and then analyzed with the help of FESS. From the experimental results, flywheel 1 with a ringtype web-concave generate kinetic energy of 312.30 J and specific energy of 31.23 J / kg, at the flywheel 2 which is type-straight arm kinetic energy gained by 316.73 J and energy specific of 31.67 J / kg and flywheel 3 with a ring-type web-straight kinetic energy obtained by 284.997 J and specific energy of 28.49 J / kg. From the research data we can conclude that each design geometry flywheel has a different contribution to the performance of energy storage.

scholarly journals Electrical system design of solar powered electrical recreational boat for Indonesian waters

2018 ◽  
Vol 67 ◽  
pp. 04011
Author(s):  
Sunaryo Sunaryo ◽  
Adri Wirawan Ramadhani
Keyword(s):  
Solar Energy ◽  
Fossil Fuel ◽  
Electrical Power ◽  
Electrical Energy ◽  
Green Energy ◽  
Solar Panels ◽  
Electrical System ◽  
Literature Study ◽  
The Government ◽  
Solar Powered

Indonesia has more than 17,000 islands and has plenty of beautiful beaches and underwater spots which have great potential for maritime tourism. Tourism was ranked 3rd on Indonesia's foreign income and plays an important role for the country’s ecomony. Despite having potential advantages, the government has not yet maximized its efforts to develop the attractiveness of its maritime tourism. Beside the beautiful spots Indonesia is also blessed with all year long sun shine, which could be tapped as renewable and green energy as substitution to fossil fuel. Refer to these great advantages of natural resources the research was aimed to support the government’s program in developing its maritime tourism and to promote the use of green and renewable energy by designing a solar-powered tourism recreational boat which has 12 meters of length. The paper is focused on the design of solar energy and its electrical system, which includes conversion of solar energy to electrical energy and store it in the battery, the required electrical power is also predicted based on the appliances and equipment installed in the boat, the optimum attachment of solar panels on the boat structure is also calculated. All the methods and information we use are obtained from literature study, discussion with experts, and surveys to Jagur as solar-powered electric boat from Universitas Indonesia.

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