Relevant bibliographies by topics / Energy storage device

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Energy storage device'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 June 2024

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Journal articles on the topic "Energy storage device"

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Katsay, A. V. "The additional consumption and savings of paid energy of traction substations when using on-board and stationary storage devices." Vestnik MGTU 26, no. 4 (December 22, 2023): 374–83. http://dx.doi.org/10.21443/1560-9278-2023-26-4-374-383.

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In traction power supply systems for city electric transport without storage devices, a significant part of the recovery energy is usefully reused for the load in the process of inter-train flows along the contact network. The excess part of the recuperation is dissipated by heat in the braking resistors. The use of on-board storage devices makes it possible to redirect all recovery energy from the car's traction drive to them. The remaining amount of no more than two-thirds of the received recuperation energy is supplied back to the traction drive from the storage device, excluding internal losses, since due to ohmic resistance, the actual efficiency of any type of storage device does not exceed 64 %. The on-board storage device consumes a significant amount of paid energy from the traction substation for its transportation by car, compensation for self-discharge, etc. The total balance of recovery energy returned to traction and losses from additional energy consumption for on-board storage devices is negative. When stationary storage devices operate in the contact network, useful recuperation flows are completely preserved. The excess part of the recovery is redirected to the contact network, where one part of it powers a low-power non-traction load while charging the storage device, and the other goes to the storage device, charging it. After a short period of storage in the storage device, the remainder of the excess recovery is released into the network for the load that appears in it. A stationary storage device has no energy consumption for transportation, and the consumption of paid energy for its own needs and compensation for self-discharge is significantly less than that of an on-board storage device due to its higher load factor. The stationary storage device has a positive balance of recovery energy which allows additional savings of paid energy from the traction substation in the amount of up to 10 % relative to such consumption during useful recovery flows without the use of storage devices.
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Ademulegun, Oluwasola O., Patrick Keatley, Motasem Bani Mustafa, and Neil J. Hewitt. "Energy Storage on a Distribution Network for Self-Consumption of Wind Energy and Market Value." Energies 13, no. 11 (May 26, 2020): 2688. http://dx.doi.org/10.3390/en13112688.

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Wind energy could be generated and captured with a storage device within the customer premises for local utilization and for the provision of various services across the electricity supply chain. To assess the benefits of adding a storage device to an electricity distribution network that has two wind turbines with a base load of 500 kW and a typical peak load under 1500 kW, a 2 MW/4 MWh storage is installed. To observe the effects of adding the storage device to the network, a technical analysis is performed using the NEPLAN 360 modelling tool while an economic analysis is carried out by estimating the likely payback period on investment. A storage potential benefit analysis suggests how changes in integration policies could affect the utility of adding the storage device. With the addition of the storage device, self-consumption of wind energy increased by almost 10%. The profitability of the project increased when the device is also deployed to provide stacked services across the electricity supply chain. Policies that permit the integration of devices into the grid could increase the profitability of storage projects.
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Jin, Baohong, Zhichao Liu, and Yichuan Liao. "Exploring the Impact of Regional Integrated Energy Systems Performance by Energy Storage Devices Based on a Bi-Level Dynamic Optimization Model." Energies 16, no. 6 (March 10, 2023): 2629. http://dx.doi.org/10.3390/en16062629.

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In the context of energy transformation, the importance of energy storage devices in regional integrated energy systems (RIESs) is becoming increasingly prominent. To explore the impact of energy storage devices on the design and operation of RIESs, this paper first establishes a bi-level dynamic optimization model with the total system cost as the optimization objective. The optimization model is used to optimize the design of three RIESs with different energy storage devices, including System 1 without an energy storage device, System 2 with a thermal energy storage (TES) device, and System 3 with TES and electrical energy storage (EES) devices. According to the design and operation results, the impact of energy storage devices on the operational performance of RIESs is analyzed. The results show that under the design conditions, energy storage devices can significantly increase the capacity of the combined heating and power units and absorption chillers in System 2 and System 3 and reduce the capacity of the ground source heat pumps and gas boilers; the impact of the TES device on System 3 is more significant. Affected by systems’ configuration, the operating cost, carbon tax, and total cost of System 2 are reduced by 2.9%, 5.5%, and 1.5% compared with System 1, respectively. The EES device can more significantly reduce the operating cost of System 3, with a reduced rate of 5.7% compared with that in System 1. However, the higher equipment cost makes the total cost reduction rate of System 3 less than that of System 1, which is 1.75%. Similar to the design conditions, under the operation conditions, the TES device can effectively reduce the carbon tax, operating cost, and total cost of System 2, while System 3 with an EES device can significantly reduce its operating cost regardless of whether the energy price changes or not. To some extent, this study systematically elucidated the impact of TES and EES devices on the optimal design and operation performance of RIESs and provided a certain reference for the configuration of energy storage devices.
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Zuyev, S. M., R. A. Maleyev, Yu M. Shmatkov, M. Yu Khandzhalov, and D. R. Yakhutl'. "Research on molecular energy storage." Izvestiya MGTU MAMI 15, no. 3 (September 15, 2021): 49–56. http://dx.doi.org/10.31992/2074-0530-2021-49-3-49-56.

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This article provides a comparative analysis of various energy storage devices. A detailed review and analysis of molecular energy storage units is carried out, their main characteristics and parameters, as well as their application areas, are determined. The main types of molecular energy storage are determined: electric double layer capacitors, pseudo capacitors, hybrid capacitors. Comparison of the characteristics of various batteries is given. The parameters of various energy storage devices are presented. The analysis of molecular energy storage devices and accumulators is carried out. Ttheir advantages and disadvantages are revealed. It has been shown that molecular energy storage or double layer electrochemical capacitors are ideal energy storage systems due to their high specific energy, fast charging and long life compared to conventional capacitors. The article presents oscillograms of a lithium-ion battery with a voltage of 10.8 V at a pulsed load current of 2A of a laptop with and without a molecular energy storage device, as well as oscillograms of a laptop with DVD lithium-ion battery with a voltage of 10.8 V with a parallel shutdown of a molecular energy storage device with a capacity of 7 F and without it. The comparative analysis shows that when the molecular energy storage unit with a 7 F capacity is switched on and off, transient processes are significantly improved and there are no supply voltage dips. The dependences of the operating time of a 3.6 V 600 mAh lithium-ion battery at a load of 2 A for powering mobile cellular devices with and without a molecular energy storage are given. It is shown that when the molecular energy storage device is switched on, the battery operation time increases by almost 20%.
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Ejaz, Haroon, Muhammad Hassan Yousaf, Muhammad ,. Shahid, Salman Ashiq, and Qaisar Mehmood Saharan. "Role of periodic table elements in advanced energy storage devices." Science Progress and Research 1, no. 4 (August 15, 2021): 220–33. http://dx.doi.org/10.52152/spr/2021.137.

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Every electronic device required energy to operate. Most of the electronic devices are consume stored energy. Energy can be stored in the device like batteries, fuel cells, and capacitors. Elements of the periodic table are playing their role significantly in such energy storage devices. In this review article, different elements are reviewed with different methods that how efficiently these are working to make storage possible. An element like lithium in LIBs can be stored up to 4 volts of power which is the strongest behavior ever. It has earned huge attention in the commercial market all across. Carbon with nitrogen can give a high charge capacity of 487 mAh/g with retention of over 80%. So, it has high capacity load performance. Na-ion batteries are used for large-scale energy storage. These have up to 372 mAh/g storage capacity. K-ion batteries have fast ionic conductivity so these can have up to 710 mAh/g storage capacity.Ca-ion shows the impressive character toward its feature and gives storage upto 200 mAh/g. Cobalt batteries also show devoting behavior and can be stored up to a capacity 707 mAh/g at the current density of 90 mAh/g. Zn-ions show tremendous character in an aqueous medium. These batteries have a storage capacity of upto 810 mAh/g. Sulfur hybrid battery with lithium gives a reversible capacity of more than 900 mAh/g which is exceptional. All of these and more elements have very much promising behavior for storage with multiple cycles. This review article builds interest and trust in these elements.
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Han, Juyeon, Seokgyu Ryu, Harim Seo, Eubin Jang, Wonwoo Choi, Jaeyoung Oh, Seungjin Park, Jihoon Choi, and Jeeyoung Yoo. "Monolithic Self-Charging Storage Device with Stable 3 V Operation." ECS Meeting Abstracts MA2023-02, no. 1 (December 22, 2023): 43. http://dx.doi.org/10.1149/ma2023-02143mtgabs.

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Monolithic self-charging storage device with Stable 3 V Operation The energy paradigm has been changing from the traditional power plant system to micro-gride system based on renewable energy. However, renewable energy including wind, solar, and vibration, is intermittent and influenced by time, weather, and location. Thus, the suitable storage device is required for efficient utilization of renewable energy. The representative combination of renewable energy and energy storage device is an energy storage system (EES) consisting of photovoltaic systems and Lithium-ion batteries. The EES is mainly applied to social infrastructure system that generate large amounts of energy. As the Fourth Industrial Revolution progresses, the rechargeable power supply including Lithium-ion batteries is widely applied to wireless system such as sensor network, wearable device, and electric vehicles. However, the batteries have only storage function, so periodic charging is required. Thus, it is necessary to develop technologies for portable and small energy generation/storage as standalone power sources that can continuously supply power to various electronic devices. Large-scale energy production/storage system has entered the maturity stage, but the development of portable and small energy generation/storage systems based on IoT is in its early stages. To date, research on this system is conducted by simply connecting energy harvesting and energy storage device to external wires after manufacturing them independently. However, the introduction of additional wires is complicated in system design and manufacturing and has difficulty in miniaturization. These problems have motivated the integration of both functions into one device. The integrated device is fabricated by sharing one electrode, called a common electrode between the energy harvesting and storage components. Currently, research on a monolithic photo-charging storage device that integrates solar cells and energy storage devices into one device has been developed. This structure can miniaturization and flexible design, thereby it is suitable for the wearable and smart device. Although the importance of an integrated device is emphasized, the current research of monolithic device is limited to the fabrication of an integrated device without considering their practicability. In other words, most studies focus on simply connecting two devices to achieve the highest overall efficiency. In this case, since the open circuit voltage of single solar cell is under 1 V, the operation of photo-charging storage device is limited to 1 V. Thus, we proposed the monolithic photo-charging storage device operating at 3 V. We fabricated the multiple series-connected perovskite solar cell to increase the operating voltage. Since the secondary batteries are difficult to be charged by the high current density of 20 mA cm−2 solar cell owing to their storage mechanism, we choose the supercapacitor with the rapid response to an applied electric field change. We select the silver paste as the common electrode owing to its strong adhesion, high electric conductivity, and lack of chemical/mechanical damage to the solar cell and supercapacitor. Based on density functional theory (DFT) calculation, we prove the common electrode exhibits good compatibility with our supercapacitor and solar cell. For this reason, the proposed photo-charging storage device exhibits an ultra-fast charging time of less than 3 sec under AM 1.5 G illumination and high overall efficiency of 13.17 % at 1 mA cm−2 and 9.87 % at 20 mA cm−2. For electric double layer supercapacitors integrated with a solar cell, higher discharging current densities that 20 mA cm−2 have not been reported so far. We firstly demonstrate the behavior of photo-charging storage device under light/dark state by the impedance analysis. By the impedance analysis, we demonstrated that the solar cell provides a stable power supply to the supercapacitor under light condition. Further, the additional encapsulation ensures the long-term stability of photo-charging storage device and demonstrate the indoor cycling performance. We prove the photo-charging storage device has high potential as an IoT sensor power source. Figure 1
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Li, Jie, Qianqian Jiang, Nannan Yuan, and Jianguo Tang. "A Review on Flexible and Transparent Energy Storage System." Materials 11, no. 11 (November 14, 2018): 2280. http://dx.doi.org/10.3390/ma11112280.

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Due to the broad application prospect, flexible and transparent electronic device has been widely used in portable wearable devices, energy storage smart window and other fields, which owns many advantages such as portable, foldable, small-quality, low-cost, good transparency, high performance and so on. All these electronic devices are inseparable from the support of energy storage device. Energy storage device, like lithium-ion battery and super capacitor, also require strict flexibility and transparency as the energy supply equipment of electronic devices. Here, we demonstrate the development and applications of flexible and transparent lithium-ion battery and super capacitor. In particular, carbon nanomaterials are widely used in flexible and transparent electronic device, due to their excellent optical and electrical properties and good mechanical properties. For example, carbon nanotubes with high electrical conductivity and low density have been widely reported by researchers. Otherwise, graphene as an emerging two-dimensional material with electrical conductivity and carrier mobility attracts comparatively more attention than that of other carbon nanomaterials. Substantial effort has been put on the research for graphene-based energy storage system by researchers from all over the world. But, there is still a long way to accomplish this goal of improving the performance for stretchable and transparent electronic device due to the existing technical conditions.
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Radu, Petru Valentin. "Modeling of the energy storage devices for the evaluation of the energy efficiency in the electric transport." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 6 (June 30, 2018): 22–28. http://dx.doi.org/10.24136/atest.2018.031.

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The purpose of the article is to present mathematical models of energy storage devices with supercapacitors and accumulators. To control the energy storage device, it was proposed to use DC/DC buck/boost invertors and mathematical models are presented. The article gives example of simulation results of the proposed model of energy storage devices simulated in Matlab/Simulink.
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CHEN, DanDan, LiQiang MAI, QiuLong WEI, Wei CHEN, ShiYu CHEN, and KangNing ZHAO. "Nanowire device for electrochemical energy storage." Chinese Science Bulletin 58, no. 32 (November 1, 2013): 3312–27. http://dx.doi.org/10.1360/972013-757.

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Zamani Kouhpanji, Mohammad Reza. "Demonstrating the effects of elastic support on power generation and storage capability of piezoelectric energy harvesting devices." Journal of Intelligent Material Systems and Structures 30, no. 2 (November 12, 2018): 323–32. http://dx.doi.org/10.1177/1045389x18806398.

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This study represents effects of an elastic support on the power generation and storage capability of piezoelectric energy harvesting devices. The governing equations were derived and solved for a piezoelectric energy harvesting device made of elastic support, multilayer piezoelectric beam, and a proof mass at its free end. Furthermore, a Thevenin model for a rechargeable battery was considered for storage of the produced power of the piezoelectric energy harvesting device. Analyzing the time-domain and frequency-domain responses of the piezoelectric energy harvesting device on an elastic support shows that the elastic deformation of the support significantly reduces the power generation and storage capability of the device. It was also found that the power generation and storage capability of the piezoelectric energy harvesting device can be enhanced by choosing appropriate physical parameters of the piezoelectric beam even if the elastic properties of the support are poor relative to elastic properties of the piezoelectric beam. These results provide an insightful understanding for designing and material selection for the support in order to reach the highest possible power generation and storage capability for piezoelectric energy harvesting devices.
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Dissertations / Theses on the topic "Energy storage device"

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Kulsangcharoen, Ponggorn. "Characterization and emulation of a new supercapacitor-type energy storage device." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13143/.

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The work in this thesis focuses on the characterization, modeling and emulation of both the supercapacitor and the new supercapattery energy storage device. The characterization involves the selection of dynamic models and experimental methodologies to derive model parameters. The characterizing processes focus on predicting short-term device dynamics, energy retention (self-discharging) and losses and round-trip efficiency. A methodology involving a pulse current method is applied for the first time to identify a model parameter to give fast device dynamic characteristics and a new constant power cycling method is used for evaluating round-trip efficiency. Experimental results are shown for a number of supercapacitor and supercapattery devices and good results are obtained. The derived models from the characterization results are implemented into the emulator system and the emulator system is used to mimic the dynamic characteristics of a scaled-up 1kW supercapattery device. The thesis also addresses voltage equalizing circuits and reports a study that investigates efficiency, a cell voltage deviation and voltage equalizing time for different control methods.
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Hawley, Christopher John. "Design and manufacture of a high temperature superconducting magnetic energy storage device." Access electronically, 2005. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060508.143200/index.html.

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Li, Dingyi. "Real-time simulation of shipboard power system and energy storage device management." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/17857.

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Master of Science
Department of Electrical and Computer Engineering
Noel Schulz
Many situations can cause a fault on a shipboard power system, especially in naval battleships. Batteries and ultra-capacitors are simulated to be backup energy storage devices (ESDs) to power the shipboard power system when an outage or damage occurs. Because ESDs have advantages such as guaranteed load leveling, good transient operation, and energy recovery during braking operation, they are commonly used for electrical ship applications. To fulfill these requirements, an energy management subsystem (EMS) with a specific control algorithm must connect ESDs to the dc link of the motor drive system. In this research, the real-time simulation of shipboard power system (SPS), bidirectional DC-DC converter, EMS, and ESDs are designed, implemented, and controlled on OPAL-RT system to test SPS survivability and ESD performance in various speed operations.
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Campbell, Kevin Ryan. "Phase Change Materials as a Thermal Storage Device for Passive Houses." PDXScholar, 2011. http://pdxscholar.library.pdx.edu/open_access_etds/201.

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This study describes a simulation-based approach for informing the incorporation of Phase Change Materials (PCMs) in buildings designed to the "Passive House" standard. PCMs provide a minimally invasive method of adding thermal mass to a building, thus mitigating overheating events. Phase change transition temperature, quantity, and location of PCM were all considered while incrementally adding PCM to Passive House simulation models in multiple climate zones across the United States. Whole building energy simulations were performed using EnergyPlus from the US Department of Energy. A prototypical Passive House with a 1500 Watt electric heater and no mechanical cooling was modeled. The effectiveness of the PCM was determined by comparing the zone-hours and zone-degree-hours outside the ASHRAE defined comfort zone for all PCM cases against a control simulation without PCM. Results show that adding PCM to Passive Houses can significantly increase thermal comfort so long as the house is in a dry or marine climate. The addition of PCM in moist climates will not significantly increase occupant comfort because the majority of discomfort in these climates arises due to latent load. For dry or marine climates, PCM has the most significant impact in climates with lower cooling degree-days, reducing by 93% the number of zone-hours outside of thermal comfort and by 98% the number of zone-degree-hours uncomfortable in Portland, Oregon. However, the application of PCM is not as well suited for very hot climates because the PCM becomes overcharged. Only single digit reductions in discomfort were realized when modeling PCM in a Passive House in Phoenix, Arizona. It was found that regardless of the climate PCM should be placed in the top floor, focusing on zones with large southern glazing areas. Also, selecting PCM with a melt temperature of 25°C resulted in the most significant increases in thermal comfort for the majority of climates studied.
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Becker, Jared. "An investigation of measurement method and phase change in a latent heat energy storage device." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6365.

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Exploring uses of two-phase mixtures as a way to store peak solar energy for off-peak usage is a novel approach that has been gaining attention in recent years to address the issues tied to solid fuel dependence. This research explores a “solar salt” mixture (40%wt KNO3 and 60%wt NaNO3) in an aluminum enclosure under two test conditions: conduction enhancement and no conduction enhancement. The central aim is to develop an understanding of thermal distributions and melt developments as the system moves from room temperature to 300 oC. Thermal pattern development is explored by experimentally observing a 2-D temperature field at 8 co-planar points, comprised of 3 radial positions with complementary circumferential measurements, using thermocouples. The instrument array is traversed to three different axial positions where collected data is compared with results from a numerical solver. Results find three important details. First, the melt pattern of the fin experiments show quicker rates of melting after the onset of melt at the bottom of the enclosure. Second, the spatial effects of the instrumentation influence the presence of thermal phenomena. Lastly, approximations of the salts behavior using numerical simulations are supported in identifying phases of melt development.
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Li, Chuan. "Thermal energy storage using carbonate-salt-based composite phase change materials : linking materials properties to device performance." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7242/.

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Thermal energy storage (TES) has a crucial role to play in conserving and efficiently utilising energy, dealing with mismatch between demand and supply, and enhancing the performance and reliability of our current energy systems. This thesis concerns TES materials and devices with an aim to establish a relationship between TES device level performance to materials properties. This is a multiscale problem. The work focuses on the use of carbonate-salt-based composite phase change materials (CPCMs) for medium and high temperature applications. A CPCM consists of a carbonate salt based phase change material (PCM), a thermal conductivity enhancement material (TCEM, graphite flake in this work) and a ceramic skeleton material (CSM, MgO in this work). Both mathematical modelling and experiments were carried out to address the multiscale problem. The wettability of carbonate salt and MgO system is first studied, followed by exploring the CPCMs microstructure characteristics and formation mechanism, and then the effective thermal conductivity of the CPCMs is carried out based on the developed microstructures. At the last part, heat transfer behaviour of CPCMs based TES at component and device levels is investigated.
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SCALIA, ALBERTO. "New devices for energy harvesting and storage: integrated third generation photovoltaic solar cells and electrochemical double layer capacitors." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2724022.

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A worldwide conversion towards renewable energy sources has to be implemented in order to hopefully avoid the irreversible consequences of the global temperature increment caused by the greenhouse gases production. In addition, the current need to benefit from electricity in every moment of daily life, mainly in case of limited access to the electric grid, is forcing the scientific community to an intensive effort towards the production of integrated energy harvesting and storage devices. The topic of this PhD thesis is to investigate and propose innovative solutions for the integration of third generation photovoltaic (PV) cells and electrochemical double layer capacitors (EDLCs), the so-called photo-capacitors. Different photo-capacitor structures have been studied and experimentally fabricated. At first, flexibility was explored, as it is a mandatory requirement to cover non-planar or bendable surfaces, which are more and more common in nowadays portable electronics. Easily scalable fabrication processes have been used for both the harvester and the storage units, employing photopolymer membranes as electrolytes and metallic grids as current collectors and electrodes substrates. For this configuration, the best overall conversion and storage efficiency ever reported for a flexible Dye sensitized solar cell (DSSC)-based photo-capacitor was demonstrated. Subsequently, observing in the literature an evident lack in the exploitation of high voltage photo-capacitors, EDLC electrolytes with broad voltage windows have been examined. These electrolytes allowed to fabricate stable and reliable devices integrating the EDLC with a PV module and not only with a single solar cell, as normally is done. High voltage values, up to 2.5 V, have been obtained employing an ionic liquid electrolyte (Pyr14TFSI) or –alternatively- a solid state electrolyte (PEO-Pyr14TFSI) for storage section fabrication. Moreover, novel electrolyte mixtures of organic solvents and ionic liquids with good physical and electrochemical properties have been employed with the aim to increase energy density and voltage with respect to commercial EDLCs. Finally, a novel polymer-based platform has been suggested for the fabrication of an innovative “two-electrodes” self-powered device. The multifunctional polymeric layer, made of two poly(ethylene glycol)-based sections separated by a perfluorinated barrier, was obtained by oxygen-inhibited UV-light crosslinking procedure. For the energy harvesting section, one side of the polymeric layer was adapted to enable iodide/triiodide diffusion in a DSSC, while the other side empowered sodium/chloride ions diffusion and was used for on-board charge storage. The resulting photo-capacitor results in a planar architecture appreciably simplified with respect to other recently proposed solutions and is definitely more easily exploitable in low power electronics.
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Krishnamoorthy, Sreenidhi. "Experimental Testing and Mathematical Modeling of a Thermoelectric Based Hydronic Cooling and Heating Device with Transient Charging of Sensible Thermal Energy Storage Water Tank." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1227299540.

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Martinez-Gonzalez, Pablo. "A study on the integration of a high-speed flywheel as an energy storage device in hybrid vehicles." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6082.

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The last couple of decades have seen the rise of the hybrid electric vehicle as a compromise between the outstanding specific energy of petrol fuels and its low-cost technology, and the zero tail-gate emissions of the electric vehicle. Despite this, considerable reductions in cost and further increases in fuel economy are needed for their widespread adoption. An alternative low-cost energy storage technology for vehicles is the high-speed flywheel. The flywheel has important limitations that exclude it from being used as a primary energy source for vehicles, but its power characteristics and low-cost materials make it a powerful complement to a vehicle's primary propulsion system. This thesis presents an analysis on the integration of a high-speed flywheel for use as a secondary energy storage device in hybrid vehicles. Unlike other energy storage technologies, the energy content of the flywheel has a direct impact on the velocity of transmission. This presents an important challenge, as it means that the flywheel must be able to rotate at a speed independent of the vehicle's velocity and therefore it must be coupled via a variable speed transmission. This thesis presents some practical ways in which to accomplish this in conventional road vehicles, namely with the use of a variator, a planetary gear set or with the use of a power-split continuously variable transmission. Fundamental analyses on the kinematic behaviour of these transmissions particularly as they pertain to flywheel powertrains are presented. Computer simulations were carried out to compare the performance of various transmissions, and the models developed are presented as well. Finally the thesis also contains an investigation on the driving and road conditions that have the most beneficial effect on hybrid vehicle performance, with a particular emphasis on the effect that the road topography has on fuel economy and the significance of this.
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Si, Wenping. "Designing Electrochemical Energy Storage Microdevices: Li-Ion Batteries and Flexible Supercapacitors." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-160049.

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Die Menschheit steht vor der großen Herausforderung der Energieversorgung des 21. Jahrhundert. Nirgendwo ist diese noch dringlicher geworden als im Bereich der Energiespeicherung und Umwandlung. Konventionelle Energie kommt hauptsächlich aus fossilen Brennstoffen, die auf der Erde nur begrenzt vorhanden sind, und hat zu einer starken Belastung der Umwelt geführt. Zusätzlich nimmt der Energieverbrauch weiter zu, insbesondere durch die rasante Verbreitung von Fahrzeugen und verschiedener Kundenelektronik wie PCs und Mobiltelefone. Alternative Energiequellen sollten vor einer Energiekrise entwickelt werden. Die Gewinnung erneuerbarer Energie aus Sonne und Wind sind auf jeden Fall sehr wichtig, aber diese Energien sind oft nicht gleichmäßig und andauernd vorhanden. Energiespeichervorrichtungen sind daher von großer Bedeutung, weil sie für eine Stabilisierung der umgewandelten Energie sorgen. Darüber hinaus ist es eine enttäuschende Tatsache, dass der Akku eines Smartphones jeglichen Herstellers heute gerade einen Tag lang ausreicht, und die Nutzer einen zusätzlichen Akku zur Hand haben müssen. Die tragbare Elektronik benötigt dringend Hochleistungsenergiespeicher mit höherer Energiedichte. Der erste Teil der vorliegenden Arbeit beinhaltet Lithium-Ionen-Batterien unter Verwendung von einzelnen aufgerollten Siliziumstrukturen als Anoden, die durch nanotechnologische Methoden hergestellt werden. Eine Lab-on-Chip-Plattform wird für die Untersuchung der elektrochemischen Kinetik, der elektrischen Eigenschaften und die von dem Lithium verursachten strukturellen Veränderungen von einzelnen Siliziumrohrchen als Anoden in einer Lithium-Ionen-Batterie vorgestellt. In dem zweiten Teil wird ein neues Design und die Herstellung von flexiblen on-Chip, Festkörper Mikrosuperkondensatoren auf Basis von MnOx/Au-Multischichten vorgestellt, die mit aktueller Mikroelektronik kompatibel sind. Der Mikrosuperkondensator erzielt eine maximale Energiedichte von 1,75 mW h cm-3 und eine maximale Leistungsdichte von 3,44 W cm-3. Weiterhin wird ein flexibler und faserartig verwebter Superkondensator mit einem Cu-Draht als Substrat vorgestellt. Diese Dissertation wurde im Rahmen des Forschungsprojekts GRK 1215 "Rolled-up Nanotechnologie für on-Chip Energiespeicherung" 2010-2013, finanziell unterstützt von der International Research Training Group (IRTG), und dem PAKT Projekt "Elektrochemische Energiespeicherung in autonomen Systemen, no. 49004401" 2013-2014, angefertigt. Das Ziel der Projekte war die Entwicklung von fortschrittlichen Energiespeichermaterialien für die nächste Generation von Akkus und von flexiblen Superkondensatoren, um das Problem der Energiespeicherung zu addressieren. Hier bedanke ich mich sehr, dass IRTG mir die Möglichkeit angebotet hat, die Forschung in Deutschland stattzufinden
Human beings are facing the grand energy challenge in the 21st century. Nowhere has this become more urgent than in the area of energy storage and conversion. Conventional energy is based on fossil fuels which are limited on the earth, and has caused extensive environmental pollutions. Additionally, the consumptions of energy are still increasing, especially with the rapid proliferation of vehicles and various consumer electronics like PCs and cell phones. We cannot rely on the earth’s limited legacy forever. Alternative energy resources should be developed before an energy crisis. The developments of renewable conversion energy from solar and wind are very important but these energies are often not even and continuous. Therefore, energy storage devices are of significant importance since they are the one stabilizing the converted energy. In addition, it is a disappointing fact that nowadays a smart phone, no matter of which brand, runs out of power in one day, and users have to carry an extra mobile power pack. Portable electronics demands urgently high-performance energy storage devices with higher energy density. The first part of this work involves lithium-ion micro-batteries utilizing single silicon rolled-up tubes as anodes, which are fabricated by the rolled-up nanotechnology approach. A lab-on-chip electrochemical device platform is presented for probing the electrochemical kinetics, electrical properties and lithium-driven structural changes of a single silicon rolled-up tube as an anode in lithium ion batteries. The second part introduces the new design and fabrication of on chip, all solid-state and flexible micro-supercapacitors based on MnOx/Au multilayers, which are compatible with current microelectronics. The micro-supercapacitor exhibits a maximum energy density of 1.75 mW h cm-3 and a maximum power density of 3.44 W cm-3. Furthermore, a flexible and weavable fiber-like supercapacitor is also demonstrated using Cu wire as substrate. This dissertation was written based on the research project supported by the International Research Training Group (IRTG) GRK 1215 "Rolled-up nanotech for on-chip energy storage" from the year 2010 to 2013 and PAKT project "Electrochemical energy storage in autonomous systems, no. 49004401" from 2013 to 2014. The aim of the projects was to design advanced energy storage materials for next-generation rechargeable batteries and flexible supercapacitors in order to address the energy issue. Here, I am deeply indebted to IRTG for giving me an opportunity to carry out the research project in Germany. September 2014, IFW Dresden, Germany Wenping Si
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Books on the topic "Energy storage device"

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Sentā, Kagaku Gijutsu Shinkō Kikō Kenkyū Kaihatsu Senryaku. Jiji sedai niji denchi, chikuden debaisu kiban gijutsu: Teitanso shakai, bunsangata enerugī shakai jitsugen no kī debaisu = Next-next-generation rechargeable batteries and electric storage device technologies : key devices for low carbon society and decentralized energy systems. Tōkyō: Kagaku Gijutsu Shinkō Kikō Kenkyū Kaihatsu Senryaku Sentā, 2012.

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Gaur, Anurag, A. L. Sharma, and Anil Arya. Energy Storage and Conversion Devices. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003141761.

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Thoutam, Laxman Raju, J. Ajayan, and D. Nirmal. Energy Harvesting and Storage Devices. New York: CRC Press, 2023. http://dx.doi.org/10.1201/9781003340539.

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Zhi, Chunyi, and Liming Dai, eds. Flexible Energy Conversion and Storage Devices. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527342631.

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Rajput, Shailendra, Sabyasachi Parida, Abhishek Sharma, and Sonika. Dielectric Materials for Energy Storage and Energy Harvesting Devices. New York: River Publishers, 2023. http://dx.doi.org/10.1201/9781032630816.

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Peng, Huisheng. Fiber-Shaped Energy Harvesting and Storage Devices. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-45744-3.

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Sharma, Yogesh, Ghanshyam Das Varma, Amartya Mukhopadhyay, and Venkataraman Thangadurai, eds. Recent Research Trends in Energy Storage Devices. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-6394-2.

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Ezema, Fabian Ifeanyichukwu, Tingkai Zhao, and Ishaq Ahmad. Graphene Oxide in Enhancing Energy Storage Devices. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003215196.

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Saxena, Amit, Bhaskar Bhattacharya, and Felipe Caballero-Briones. Applications of Nanomaterials for Energy Storage Devices. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003216308.

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Jain, V. K., Chandima Gomes, and Abhishek Verma, eds. Renewable Energy and Storage Devices for Sustainable Development. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9280-2.

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Book chapters on the topic "Energy storage device"

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Akhmetov, B., J. O. Khor, T. Amanzholov, A. Kaltayev, A. Romagnoli, and Y. Ding. "Chapter 12. Modelling at Thermal Energy Storage Device Scale." In Thermal Energy Storage, 370–434. Cambridge: Royal Society of Chemistry, 2021. http://dx.doi.org/10.1039/9781788019842-00370.

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Priyadarshi, Himanshu, Ashish Shrivastava, and Kulwant Singh. "Energy Storage Device Fundamentals and Technology." In Electrical and Electronic Devices, Circuits and Materials, 119–30. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis: CRC Press, 2021. http://dx.doi.org/10.1201/9781003097723-7.

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Peng, Huisheng. "Fiber-Shaped Integrated Device." In Fiber-Shaped Energy Harvesting and Storage Devices, 179–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45744-3_8.

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Kyaw, Aung Ko Ko, Ming Fei Yang, and Xiao Wei Sun. "Solar Cell as an Energy Harvesting Device." In Electrochemical Technologies for Energy Storage and Conversion, 463–539. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527639496.ch11.

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Sojitra, Milan, Sachin Gupta, Arunendra Kumar Tiwari, Asim Kumar Joshi, and Ramkishore Singh. "CFD Simulation of Portable Thermal Storage Device for Solar Cooking System." In Green Energy and Technology, 529–38. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2279-6_46.

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Mai, Liqiang, Lin Xu, and Wei Chen. "Vanadium-Based Nanomaterials for Micro-Nano and Flexible Energy Storage Device." In Vanadium-Based Nanomaterials for Electrochemical Energy Storage, 287–302. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-44796-9_10.

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Jaiswal, Neelam, and Sandeep Kakran. "Energy Scheduling of Residential Household Appliances with Wind Energy Source and Energy Storage Device." In Lecture Notes in Electrical Engineering, 171–81. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7472-3_14.

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Nsude, Hope E., Kingsley U. Nsude, Sabastine E. Ugwuanyi, Raphael M. Obodo, M. Maaza, and F. I. Ezema. "The Role of Graphene Oxide in Enhancement of Working Principle of Dielectric Capacitors as Energy Storage Device." In Graphene Oxide in Enhancing Energy Storage Devices, 19–35. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003215196-2.

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Thakur, Neha, Pradipta Samanta, and Sunita Mishra. "Methods and Technologies for Recycling Energy Storage Materials and Device." In Recent Advancements in Polymeric Materials for Electrochemical Energy Storage, 489–507. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4193-3_28.

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Sreeraj, R., A. K. Aadhithiyan, Prateek Sahoo, and S. Anbarasu. "Heat Transfer Enhancement of Metal Hydride Based Hydrogen Storage Device Using Nano-fluids." In Green Energy and Technology, 689–703. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2279-6_61.

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Conference papers on the topic "Energy storage device"

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Bin, Li, Wan Jianru, Li Mingshui, and Ge Ang. "Research on elevator drive device with super capacitor for energy storage." In Energy Storage. IEEE, 2011. http://dx.doi.org/10.1109/pesa.2011.5982935.

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Ang, Ge, Wan Jianru, Niu Zhiwei, and Li Bin. "Research on current feed forward decoupling control for energy feedback and grid-connected device." In Energy Storage. IEEE, 2011. http://dx.doi.org/10.1109/pesa.2011.5982934.

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Panwar, Ritika, and Vinod Kumar. "Flexible and thin energy storage device." In 2ND INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN COMPUTATIONAL TECHNIQUES. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0140228.

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Yong, Sheng, Nicholas Hillier, and Stephen Beeby. "Enhanced Textile Hybrid Energy Storage Device." In 2022 21st International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS). IEEE, 2022. http://dx.doi.org/10.1109/powermems56853.2022.10007603.

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Smith, Sheriden, and Young Ho Park. "Molecular Dynamics Study of Energy Storage Device." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63611.

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Currently, the dominating energy storage device remains the battery, particularly the lithium battery. Lithium/lithium-ion batteries are used for various applications. For example, lithium battery powered pipeline inspection tools are used by the oil and gas industry for internal inspection of pipelines. Lithium batteries are complex devices whose performance optimization requires a good understanding of physical processes that occur on multiple time and length scales. Optimization of the electrolyte, in particular, needs detailed, fundamental, molecular level understanding of the chemical and mechanical features that lead to stable electrolytes such as good interfacial lithium transport properties, thermal stability and safety. In this work, we use molecular dynamics (MD) computational technique to investigate thermodynamic and dynamics properties for various carbonate-based electrolyte systems of lithium-ion batteries.
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Chambers, Justin R., Andrew D. Lowery, and James E. Smith. "Collapsible Wind Powered Energy Generation and Storage Device." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51816.

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The described research is a light weight, inexpensive portable and collapsible wind turbine, small enough to be carried in a backpack, ruck sack or within the storage compartment of a vehicle, which can be used to recharge batteries and provide off-site, emergency, or campsite power. As a means to extend the battery life of electronic equipment while moving away from the power grid and extra battery storage, a power generating unit is needed. Current approaches are to carry the anticipated number of spare batteries, to use solar cells or any number of small generating thermionic devices. While each of these have a place in the market, they also have negative cost, size, and weight drawbacks. The objective of this research is to create a power generating/storage wind turbine device for recreational, emergency, and military use that can easily be collapsed and transported as needed. The device is a lightweight, collapsible wind turbine constructed of rugged materials to be used on camp sites, remote locations etc. and carried within a pack for travel. It is of a size and weight to be part of an emergency or survival pack. The wind turbine, in its preferred embodiment, is a self-starting/sustaining device that starts at low wind speeds so no monitoring or priming of the device is necessary. In addition to the novelty of it being collapsible, the wind turbine device employs advanced features to increase its wind energy capture efficiency and its energy storage and delivery system, along with unique design features that make it rugged, lightweight and easily assembled.
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Chen, Cong, and Anjia Mao. "Application and Simulation of Energy Storage Device." In 2019 IEEE 4th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC). IEEE, 2019. http://dx.doi.org/10.1109/iaeac47372.2019.8998070.

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Han, Wei. "An energy storage device for lifting machinery." In 5th International Conference on Information Engineering for Mechanics and Materials. Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icimm-15.2015.293.

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Svasta, P., R. Negroiu, and Al Vasile. "Supercapacitors — An alternative electrical energy storage device." In 2017 5th International Symposium on Electrical and Electronics Engineering (ISEEE). IEEE, 2017. http://dx.doi.org/10.1109/iseee.2017.8170626.

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Homitz, Joseph, Brian P. Tucker, and Janelle M. Messmer. "Thermal Storage Device for High-Power-Density Systems." In ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58312.

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High power levels and high power densities associated with directed energy weapon (DEW) systems, electronic warfare systems, and high thrust-to-weight propulsion systems require the development of effective and efficient thermal management solutions. Among many critical thermal management issues, high peak waste heat generation and limited cooling capacity onboard mobile weapon platforms necessitate the development of advanced thermal storage devices. In addition to storing large amounts of energy in a compact, lightweight package, the devices must be able to store energy rapidly at high power levels. This paper presents the design of an advanced phase-change thermal storage device developed to meet the requirements of high-power-density systems. Results of experimental performance evaluations are also presented. Based on these evaluations, it is predicted that the device will be able to store an average heat load of up to 2.9 kW/kg over a 20-second period. This thermal storage device is applicable to many different thermal management architectures, is easily adapted to meet the requirements of a wide range of high-power systems, and has potential to significantly reduce thermal management size, weight, and power requirements.
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Reports on the topic "Energy storage device"

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Mayer, S. T., R. W. Pekala, and J. L. Kaschmitter. The aerocapacitor: An electrochemical double-layer energy-storage device. Office of Scientific and Technical Information (OSTI), October 1997. http://dx.doi.org/10.2172/539853.

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Parry, Robert. Final Technical Report for Electric Utility Energy Storage Device for the Period of July 1999 to September 2000. Office of Scientific and Technical Information (OSTI), October 2000. http://dx.doi.org/10.2172/766517.

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Johns, William H. Functional and operational requirements document : building 1012, Battery and Energy Storage Device Test Facility, Sandia National Laboratories, New Mexico. Office of Scientific and Technical Information (OSTI), November 2013. http://dx.doi.org/10.2172/1121909.

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Durstock, Michael F. Advanced Energy Storage and Conversion Devices. Fort Belvoir, VA: Defense Technical Information Center, December 2008. http://dx.doi.org/10.21236/ada515951.

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Browning, Charles, and Liming Dai. Aligned Carbon Nanotubes for Highly Efficient Energy Generation and Storage Devices. Fort Belvoir, VA: Defense Technical Information Center, January 2012. http://dx.doi.org/10.21236/ada575833.

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No, author. Research and Development of High-Power and High-Energy Electrochemical Storage Devices. Office of Scientific and Technical Information (OSTI), April 2014. http://dx.doi.org/10.2172/1160224.

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Farmer, J. ARPA-E Program: Advanced Management Protection of Energy Storage Devices (AMPED) - Monthly Report - November 2013. Office of Scientific and Technical Information (OSTI), December 2013. http://dx.doi.org/10.2172/1116984.

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Farmand, Maryam. X-ray Absorption Spectroscopy Characterization of Electrochemical Processes in Renewable Energy Storage and Conversion Devices. Office of Scientific and Technical Information (OSTI), May 2013. http://dx.doi.org/10.2172/1341608.

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Walmet, Paula S. Evaluation of lead/carbon devices for utility applications : a study for the DOE Energy Storage Program. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/973661.

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Galili, Naftali, Roger P. Rohrbach, Itzhak Shmulevich, Yoram Fuchs, and Giora Zauberman. Non-Destructive Quality Sensing of High-Value Agricultural Commodities Through Response Analysis. United States Department of Agriculture, October 1994. http://dx.doi.org/10.32747/1994.7570549.bard.

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The objectives of this project were to develop nondestructive methods for detection of internal properties and firmness of fruits and vegetables. One method was based on a soft piezoelectric film transducer developed in the Technion, for analysis of fruit response to low-energy excitation. The second method was a dot-matrix piezoelectric transducer of North Carolina State University, developed for contact-pressure analysis of fruit during impact. Two research teams, one in Israel and the other in North Carolina, coordinated their research effort according to the specific objectives of the project, to develop and apply the two complementary methods for quality control of agricultural commodities. In Israel: An improved firmness testing system was developed and tested with tropical fruits. The new system included an instrumented fruit-bed of three flexible piezoelectric sensors and miniature electromagnetic hammers, which served as fruit support and low-energy excitation device, respectively. Resonant frequencies were detected for determination of firmness index. Two new acoustic parameters were developed for evaluation of fruit firmness and maturity: a dumping-ratio and a centeroid of the frequency response. Experiments were performed with avocado and mango fruits. The internal damping ratio, which may indicate fruit ripeness, increased monotonically with time, while resonant frequencies and firmness indices decreased with time. Fruit samples were tested daily by destructive penetration test. A fairy high correlation was found in tropical fruits between the penetration force and the new acoustic parameters; a lower correlation was found between this parameter and the conventional firmness index. Improved table-top firmness testing units, Firmalon, with data-logging system and on-line data analysis capacity have been built. The new device was used for the full-scale experiments in the next two years, ahead of the original program and BARD timetable. Close cooperation was initiated with local industry for development of both off-line and on-line sorting and quality control of more agricultural commodities. Firmalon units were produced and operated in major packaging houses in Israel, Belgium and Washington State, on mango and avocado, apples, pears, tomatoes, melons and some other fruits, to gain field experience with the new method. The accumulated experimental data from all these activities is still analyzed, to improve firmness sorting criteria and shelf-life predicting curves for the different fruits. The test program in commercial CA storage facilities in Washington State included seven apple varieties: Fuji, Braeburn, Gala, Granny Smith, Jonagold, Red Delicious, Golden Delicious, and D'Anjou pear variety. FI master-curves could be developed for the Braeburn, Gala, Granny Smith and Jonagold apples. These fruits showed a steady ripening process during the test period. Yet, more work should be conducted to reduce scattering of the data and to determine the confidence limits of the method. Nearly constant FI in Red Delicious and the fluctuations of FI in the Fuji apples should be re-examined. Three sets of experiment were performed with Flandria tomatoes. Despite the complex structure of the tomatoes, the acoustic method could be used for firmness evaluation and to follow the ripening evolution with time. Close agreement was achieved between the auction expert evaluation and that of the nondestructive acoustic test, where firmness index of 4.0 and more indicated grade-A tomatoes. More work is performed to refine the sorting algorithm and to develop a general ripening scale for automatic grading of tomatoes for the fresh fruit market. Galia melons were tested in Israel, in simulated export conditions. It was concluded that the Firmalon is capable of detecting the ripening of melons nondestructively, and sorted out the defective fruits from the export shipment. The cooperation with local industry resulted in development of automatic on-line prototype of the acoustic sensor, that may be incorporated with the export quality control system for melons. More interesting is the development of the remote firmness sensing method for sealed CA cool-rooms, where most of the full-year fruit yield in stored for off-season consumption. Hundreds of ripening monitor systems have been installed in major fruit storage facilities, and being evaluated now by the consumers. If successful, the new method may cause a major change in long-term fruit storage technology. More uses of the acoustic test method have been considered, for monitoring fruit maturity and harvest time, testing fruit samples or each individual fruit when entering the storage facilities, packaging house and auction, and in the supermarket. This approach may result in a full line of equipment for nondestructive quality control of fruits and vegetables, from the orchard or the greenhouse, through the entire sorting, grading and storage process, up to the consumer table. The developed technology offers a tool to determine the maturity of the fruits nondestructively by monitoring their acoustic response to mechanical impulse on the tree. A special device was built and preliminary tested in mango fruit. More development is needed to develop a portable, hand operated sensing method for this purpose. In North Carolina: Analysis method based on an Auto-Regressive (AR) model was developed for detecting the first resonance of fruit from their response to mechanical impulse. The algorithm included a routine that detects the first resonant frequency from as many sensors as possible. Experiments on Red Delicious apples were performed and their firmness was determined. The AR method allowed the detection of the first resonance. The method could be fast enough to be utilized in a real time sorting machine. Yet, further study is needed to look for improvement of the search algorithm of the methods. An impact contact-pressure measurement system and Neural Network (NN) identification method were developed to investigate the relationships between surface pressure distributions on selected fruits and their respective internal textural qualities. A piezoelectric dot-matrix pressure transducer was developed for the purpose of acquiring time-sampled pressure profiles during impact. The acquired data was transferred into a personal computer and accurate visualization of animated data were presented. Preliminary test with 10 apples has been performed. Measurement were made by the contact-pressure transducer in two different positions. Complementary measurements were made on the same apples by using the Firmalon and Magness Taylor (MT) testers. Three-layer neural network was designed. 2/3 of the contact-pressure data were used as training input data and corresponding MT data as training target data. The remaining data were used as NN checking data. Six samples randomly chosen from the ten measured samples and their corresponding Firmalon values were used as the NN training and target data, respectively. The remaining four samples' data were input to the NN. The NN results consistent with the Firmness Tester values. So, if more training data would be obtained, the output should be more accurate. In addition, the Firmness Tester values do not consistent with MT firmness tester values. The NN method developed in this study appears to be a useful tool to emulate the MT Firmness test results without destroying the apple samples. To get more accurate estimation of MT firmness a much larger training data set is required. When the larger sensitive area of the pressure sensor being developed in this project becomes available, the entire contact 'shape' will provide additional information and the neural network results would be more accurate. It has been shown that the impact information can be utilized in the determination of internal quality factors of fruit. Until now,
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