Papers by Keyword: Energy Storage

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Authors: Dan Feng Qiu, Yong Jun Xia, He Qing Ma, Gang Bu
Abstract: Graphene-NiO nanocomposites were prepared via a solvothermal method. The nanostructure and morphology of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). SEM and TEM results indicated that NiO nanoplates distributed homogeneously on graphene sheets. The electrochemical properties of the samples as active anode materials for lithium-ion batteries were examined by constant current charge-discharge cycling. With graphene as conductive matrix, homogeneous distribution of NiO nanoplates can be ensured and volume changes of thenanocomposite during the charge and discharge processes can be accomodated effectively, which results in good electrochemical performance of the composites.
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Authors: Mohamad Deraman, Rusli Daik, Sepideh Soltaninejad, Najah Syahirah Mohd Nor, Awitdrus, Rakhmawati Farma, Nurul Fatin Mamat, Nur Hamizah Basri, Mohd Amir Radhi Othman
Abstract: Interest in research of supercapacitor has been in increasing trend because of high demand of supercapacitor application as energy storage device in both systems that require low and high power-energy usage. For supercapacitor using porous carbon electrodes, the energy storage mechanism involves the electrolyte ions in electrodes pores and electronic charges in electrodes to form electric double layers at the electrode-electrolyte interface without undergoes any chemical reaction. The specific surface area of porous electrodes, which affect the performance of supercapacitor, have been widely investigated by many researchers using the nitrogen adsorption-desorption measurement. However, despite its simplicity the X-ray diffraction method is rarely found being used to determine the specific surface area of porous electrodes. Therefore, in the present paper, we propose a new equation which expressed the specific surface area of electrodes as a function the electrode structural parameters obtained from the X-ray diffraction data, and duration of activation time employed during the electrode preparation. This equation is found to produce a satisfactory result and is expected to be beneficial for studying supercapacitor electrode materials.
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Authors: Shen Hang Yu, Ying Sun
Abstract: Wind power is one of the cleanest and safest of all the renewable commercial methods of generating electricity. However, wind energy is difficult to use due to its stochastic variability. Energy storage can overcome the main drawback, allowing energy production to match energy demand. In this paper a new method is proposed to determine the Energy-storage Capacity in Grid-connected Wind Farm. Based on characteristic function of wind power output in wind farm, the method designs the minimum required storage capacity of the wind farm and realizes the stable output and the scheduling of wind farm. The results of this paper demonstrate the leading role of a well-optimized design for technical and economic viability of such systems.
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Authors: Wolfgang Francke, Renaud de Richter, Oswald Petersen, Janning Petersen
Abstract: Until today, the biggest solar updraft tower power plant ever built and tested was the 50 kW Spain plant in Manzanares. Since then no real plant has been built, whilst many grand plans have been drawn and given up. Solar Wind Power (SWP) is an energy form in search of its destiny: it is time to find a real market for SWP. This market is currently forming and we call it ‘evening power’. SWP transforms sunlight into heat, heat into hot artificial wind, and this wind into electricity. The three steps of transformation allow SWP to delay the generation of electricity from the daily peak of solar radiation into the evening. In the evening, the greater power demand cannot be met with other renewable CO2-free energies like wind and photovoltaic. SWP has been tested once, thirty years ago - it is time for a second trial: the Intermediate Solar Wind Power Plant (ISWiPP). The goal is to develop, test and measure SWP’s potential for heat-storage and evening power output. The technology for constructing a light steel-tower with a concrete base will be tested under real-life conditions and technologies for heat storage will be developed. The ISWiPP will enable investors to prepare for large SWiPP with hybrid (concrete and steel) towers of 1000 m height or more. This development growth path is realistic and adequate to overcome the current impasse. Like all CO2-free energy forms SWP depends very much on the location chosen. Locations with strong winds, or sand- and dust-storms, are inadequate for SWP. A good location for a SWiPP is a hot, flat and rocky desert, not too far from a city with a demand for evening power.
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Authors: Saleh A. Aboukhres, Ali S. Zayed, Hisham A. Ayad, S. Ganesan
Abstract: The Sea-waves, as a kinetic energy, is one of the renewable sources of energy which can be harnessed to generate electricity. Wave power devices extract energy directly from the surface motion of sea (ocean) waves or from pressure fluctuations below the surface. A variety of technologies have been proposed to capture the energy from waves and some of the more promising designs are undergoing demonstration testing at economical scales. In this research, the irregular kinetic energy in sea waves is to be converted to a stored potential energy and used in a regular form, with conversion once again to mechanical energy, for driving a turbine which to be connected to an electricity generator through a gear box. Wave power varies considerably in different parts of the world and wave energy cannot be harnessed effectively everywhere. Because sea waves may become ineffective for a period of time, this research is concerned with the storage of energy in one of its forms.
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Authors: K. Karuppasamy, R. Antony, S. Alwin, S. Balakumar, X. Sahaya Shajan
Abstract: Nanocomposite polymer electrolytes (NCPEs) have been playing a considerable role in the development of alternative clean and sustainable energy technologies. This review article summarizes the recent research progress on the synthesis and characterization of NCPEs and its application in lithium ion battery based energy storage devices. First, an introduction on the properties, synthesis strategies and use of NCPEs is briefly given, followed by a state-of-the-art review on the preparation of NCPEs and their electrochemical properties in lithium ion battery (LIB) applications. Finally, the prospects and future challenges of NCPEs for energy storage are discussed
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Authors: Inra Supardi, Zamri Noranai, Mohammad Zainal M. Yusof
Abstract: Energy is very important in our daily activity especially in commercial and industries sector. These requirements have increased from time to time and as the result it is significantly end up with high energy demand and high energy cost. Thermal Energy Storage (TES) can be used as an alternative solution to reduce high energy demand and to reduce energy cost. The main reason of using TES system is to shift high energy demand from peak period to off peak period. Meanwhile, for building owner is to reduce energy cost by take opportunity low cost energy during off peak period. The purpose of this study is to develop a split unit air conditioner by substituting the circulation system with chilled water. The research was conducted by fabricating an air-conditioning blower unit integrated with cool thermal energy storage. Chilled water was used as medium to stored cool thermal energy. Water pump was used to circulate chill water from storage tank to evaporator and return back to storage tank. Series of experiments were conducted to test cooling performance of the developed product to produce cooling effect inside a chamber room. The experiments were conducted in a chamber room located at Block C6, Universiti Tun Hussein Onn Malaysia. Finally, from experiment found 0.15 meter3 of chilled water had successfully maintained chamber design temperature more than 140 minutes.
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Authors: Peng Yu, Ogidi Stephen Oodo, He Ping Zou, Dong Wang, Hui Sun
Abstract: In this paper, the wind power fluctuation is divided into three categories. For the purpose of balancing all kinds of wind power fluctuation to enhance the penetration levels of wind power, we propose an active-parallel hybrid energy storage system (APHESS). The APHESS is composed of a battery, a supercapacitor, and two charge-discharge controllers. By combining the battery with the supercapacitor, the APHESS obtains the enhanced energy storage performance. Therefore, the investment cost can be reduced. By the reasonable design on the operation mode of APHESS, the APHESS can interchange power precisely with the wind power system. Furthermore, the battery and supercapacitor can suppress separately different kinds of wind power fluctuation to make their own energy storage properties fully utilized. The APHESS can be widely used in wind farm for the real-time regulation on wind power
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Authors: Xin Zhen Feng, Yi Bin Tao, Jin Hang Hu, Qiang Li
Abstract: With the continuous development of distributed solar, wind power and other renewable energy sources, renewable energy sources which has its own features, such as intermittent and randomness volatility, brings great challenges to the stable operation of power grid. Aiming at meeting the requirement of balancing the fluctuating renewable energy sources of micro grid, this paper proposes the operating control strategies of the zinc bromine flow battery storage. Firstly, the equivalent mathematical model based on the working principle of the zinc bromine flow battery is established; Secondly, a dual closed-loop strategy for the DC/DC converter is proposed, of which the inner loop is peak current control on zinc bromine flow battery side inductance while the outer loop is a switch control by constant active power and trickle current. By resorting the DC/AC grid side converter, the stability of DC bus voltage is maintained; Then, this paper proposes the optimization power control strategies of zinc bromine battery energy storage system as a constraint of state of charge and DC bus voltage; Finally, a 50kW zinc bromine flow battery energy storage system test platform is built, and the charging and discharging characteristics of zinc bromine energy storage system (ZESS) is researched in grid-connected mode, the test results have shown that the proposed power optimization control strategies for zinc bromine energy storage system could smooth renewable energy sources power fluctuation.
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Authors: Ji Lei Ye, Ji Hua Xue, Fu Bao Wu, Bo Yang
Abstract: In this paper, the characteristics and applications of various battery energy storage systems (BESS) are compared. The lead acid batteries are emphatically summarized, involving categories, principles and critical techniques. According to the running condition and performance needs of energy storage in renewable energy power generation system, appropriate lead acid battery is selected. The energy storage system control method based on low-pass filter is systematically expatiated. Finally, the deployment of energy storage in micro-grid is also calculated by supplying reliable power for the consumer within certain time.
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