Gold-nanoparticle-embedded microchannel array for enhanced power generation

Lab on a Chip ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 2717-2723 ◽  
Author(s):  
Soumen Mandal ◽  
Souvik Paul ◽  
Saswata Mukhopadhyay ◽  
Ravi Kumar Arun ◽  
Debeshi Dutta ◽  
...  
Keyword(s):  
Power Generation ◽  
Gold Nanoparticle ◽  
Power Density ◽  
Power Generator ◽  
Microchannel Array ◽  
A Value

Flow of water in a gold-nanoparticle-embedded microchannel power generator generated a power density of 4.3 μW cm−2, a value ∼256 times higher than that last reported.

Combustion-Driven Thermal Transpiration Based Minature SOFC Power Generation Device

2011 ◽  
Author(s):  
Pingying Zeng ◽  
Kang Wang ◽  
Nancy Menapace ◽  
Jeongmin Ahn
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Power Density ◽  
Catalytic Combustion ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Power Generator ◽  
Thermal Transpiration ◽  
Power Generation Device

A miniature pump was designed in this study, based on a catalytic combustion-driven thermal transpiration. The designed pump was further used to build a miniature power generator that has self-pumping and power generation integrated into one device, has no moving parts and operates only on thermal and electrochemical energy supplied by hydrocarbon fuels. A solid oxide fuel cell tested with this power generator obtained a power density of 40 mW.cm−2.

scholarly journals Combining QuickSCAT wind data and Landsat ETM+ images to evaluate the offshore wind power resource of East Vietnam Sea

2020 ◽  
Vol 20 (2) ◽  
pp. 143-153
Author(s):  
Nguyen Xuan Tung ◽  
Do Huy Cuong ◽  
Bui Thi Bao Anh ◽  
Nguyen Thi Nhan ◽  
Tran Quang Son
Keyword(s):  
Power Generation ◽  
Wind Energy ◽  
Wind Power ◽  
Power Density ◽  
Geographical Location ◽  
Wind Power Generation ◽  
Offshore Wind ◽  
Wind Data ◽  
Power Capacity ◽  
Wind Power Density

Since the East Vietnam Sea has an advantageous geographical location and rich natural resources, we can develop and manage islands and reefs in this region reasonably to declare national sovereignty. Based on 1096 scenes of QuikSCAT wind data of 2006–2009, wind power density at 10 m hight is calculated to evaluate wind energy resources of the East Vietnam Sea. With a combination of wind power density at 70 m hight calculated according to the power law of wind energy profile and reef flats extracted from 35 scenes of Landsat ETM+ images, installed wind power capacity of every island or reef is estimated to evaluate wind power generation of the East Vietnam Sea. We found that the wind power density ranges from levels 4–7, so that the wind energy can be well applied to wind power generation. The wind power density takes on a gradually increasing trend in seasons. Specifically, the wind power density is lower in spring and summer, whereas it is higher in autumn and winter. Among islands and reefs in the East Vietnam Sea, the installed wind power capacity of Hoang Sa archipelago is highest in general, the installed wind power capacity of Truong Sa archipelago is at the third level. The installed wind power capacity of Discovery Reef, Bombay Reef, Tree island, Lincoln island, Woody Island of Hoang Sa archipelago and Mariveles Reef, Ladd Reef, Petley Reef, Cornwallis South Reef of Truong Sa archipelago is relatively high, and wind power generation should be developed on these islands first.

Experimental Study on a Cascade Flapping Wing Hydroelectric Power Generator

2011 ◽  
Author(s):  
Hisanori Abiru ◽  
Akira Yoshitake
Keyword(s):  
Power Generation ◽  
Electric Motor ◽  
Flapping Wing ◽  
Hydroelectric Power ◽  
Power Generator ◽  
Flow Energy ◽  
Wing Model ◽  
Leaf Springs ◽  
Hydroelastic Response ◽  
Elastically Supported

In this paper, a hydroelectric power generator that can extract the water flow energy from the hydroelastic response of an elastically supported rectangular wing is experimentally investigated. An electric motor is used to excite pitching oscillations of the wing. The wing and the electric motor are supported by leaf springs that are designed to function both as a linear guide for the sway oscillations and as elastic elements. The wing mass in the sway direction necessary to achieve a hydroelastic response is obtained by utilizing a mechanical snubber mechanism. The load to generate electricity is provided equivalently by magnetic dampers. In a previous paper, the power generation rate and the efficiency of a single-wing model were examined through experiments, and the feasibility of a flapping wing hydroelectric power generator was verified. In this paper, the influence of neighboring wings is examined by using two experimental apparatuses with the intention of achieving a practical cascade-wing generator. Tests showed that a cascade moving in-phase with neighboring wings with smaller gaps between the wings has a higher rate of electric power generation.

scholarly journals Radiation-Thermodynamic Modelling and Simulating the Core of a Thermophotovoltaic System

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6157
Author(s):  
Chukwuma Ogbonnaya ◽  
Chamil Abeykoon ◽  
Adel Nasser ◽  
Ali Turan
Keyword(s):  
Power Generation ◽  
Power Density ◽  
Open Circuit ◽  
Cell Temperature ◽  
Energy Demands ◽  
Pv Module ◽  
Pv Cell ◽  
Parametric Studies ◽  
Generation Capacity ◽  
Silicon Based

Thermophotovoltaic (TPV) systems generate electricity without the limitations of radiation intermittency, which is the case in solar photovoltaic systems. As energy demands steadily increase, there is a need to improve the conversion dynamics of TPV systems. Consequently, this study proposes a novel radiation-thermodynamic model to gain insights into the thermodynamics of TPV systems. After validating the model, parametric studies were performed to study the dependence of power generation attributes on the radiator and PV cell temperatures. Our results indicated that a silicon-based photovoltaic (PV) module could produce a power density output, thermal losses, and maximum voltage of 115.68 W cm−2, 18.14 W cm−2, and 36 V, respectively, at a radiator and PV cell temperature of 1800 K and 300 K. Power density output increased when the radiator temperature increased; however, the open circuit voltage degraded when the temperature of the TPV cells increased. Overall, for an 80 W PV module, there was a potential for improving the power generation capacity by 45% if the TPV system operated at a radiator and PV cell temperature of 1800 K and 300 K, respectively. The thermal efficiency of the TPV system varied with the temperature of the PV cell and radiator.

Power Generation Properties of a Micro Tubular SOFC Bundle Under Pressurized Conditions

2008 ◽  
Author(s):  
S. Hashimoto ◽  
Y. Liu ◽  
K. Asano ◽  
M. Mori ◽  
Y. Funahashi ◽  
...  
Keyword(s):  
Power Generation ◽  
Power Density ◽  
Atmospheric Pressure ◽  
Polarization Resistance ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Solid Oxide ◽  
Operating Pressure ◽  
Oxide Fuel ◽  
Generation Test

A micro tubular solid oxide fuel cell (SOFC) bundle was developed based on new concept. The anode-supported micro tubular SOFCs with the cell configuration, La0.6Sr0.4Co0.2Fe0.8 O3−δ (LSCF) – Ce0.9Gd0.1O2−δ (CGO) cathode / CGO electrolyte / Ni – CGO anode were fabricated and were bundled by a porous LSCF current collecting cube 1 cm on a side. The power generation test of the fabricated SOFC bundle was carried out under pressurized conditions. Using wet 30%H2 / N2 mixture gas and air, the cubic power density of the bundle at 500°C was 0.47 Wcm−3 at 0.4Acm−2, atmospheric pressure (0.1MPa). With increasing operating pressure, the performance has been improved, and the cubic power density finally reached to 0.66 Wcm−3 at 0.6MPa. Pressurization effect for the power improvement was brought about by the open circuit voltage enhancement and reduction of the polarization resistance.

Fundamental Study on Friction-Driven Gyroscopic Power Generator Works Under Arbitrary Vibration

2019 ◽  
Author(s):  
Aya Watanabe ◽  
Ryousuke Yuyama ◽  
Hiroshi Hosaka ◽  
Akira Yamashita
Keyword(s):  
Power Generation ◽  
High Speed ◽  
Electrical Power ◽  
Low Frequency ◽  
Inertial Force ◽  
Fundamental Study ◽  
Power Generator ◽  
Energy Harvesters ◽  
Low Frequency Vibration ◽  
Circular Track

Abstract This paper describes a friction-driven gyro generator that works under arbitrary vibrations and generates more than 1 W of power. Vibrational generators are energy harvesters that convert environmental vibrations into electrical power via the inertial force of pendulums. In conventional generators that use simple vibration, the power is less than 10 mW for a wearable size because vibrations in the natural environment are as low as 1 Hz. Gyroscopic generators increase the inertial force by rotating a pendulum at high speed and creating a gyro effect. In this generator, a palm-size product that generates 0.1 W and weighs 280 g has already been commercialized, but this device operates only under a particular vibration that synchronizes rotor precession and stalls under random vibration. To solve this problem, in this research, two gimbals and a precession spring are introduced to support the rotor. We developed a prototype generator with straight tracks measuring 16 cm × 11 cm × 12 cm with a mass of 980 g. Under a vibration of 4 Hz and ±20 degrees, power generation of 1.6 W was confirmed. Next, a prototype circular track was made. Power generation of 0.2 W with a vibration of 1 Hz and ±90 degrees was confirmed. Finally, a simple formula to estimate the upper limit of the generation power is derived. It is suggested that the circular-type generator is suitable for low-frequency vibration and can generate twice the power of a straight-type generator.

Possibilities for a Novel Wave Power Generator Using Dielectric Elastomers

2020 ◽  
Author(s):  
S. Chiba ◽  
M. Waki ◽  
C. Jiang ◽  
K. Fujita
Keyword(s):  
Power Generation ◽  
Renewable Energy ◽  
Wave Power ◽  
Generation System ◽  
Ocean Energy ◽  
Power Generator ◽  
Energy Demands ◽  
Worldwide Population ◽  
Power Generation System ◽  
Effective Use

Abstract As industrialization, worldwide population growth, and improvements in the living standards in developing countries continue, demands for energy, food, and water, likewise surge. This in turn accelerates global warming, and its resultant extreme weather effects. Among the measures proposed to meet the growing energy demands, the use of renewable energy is gaining more and more attention. In particular, wave power generation is attracting a great deal of attention as an effective use of ocean energy. However, current wave generators are large and very expensive relative to their output. Furthermore, they cannot generate power efficiently with wave directivity, small amplitude waves and so on. For these reasons, widespread use is very limited. In order to solve these problems, this paper discusses the possibility of a recently developed wave power generator that uses a newly developed dielectric elastomer (DE) as a new way to harvest renewable energy. We also discuss the technical breakthrough of building a mega power generation system using DEs.

A Multi-Mode Vibration-Based Power Generator for Vehicles

2012 ◽  
Vol 251 ◽  
pp. 124-128
Author(s):  
Seiji Hashimoto ◽  
Nobuyuki Nagai ◽  
Yoshimitsu Fujikura ◽  
Jyunpei Takahashi ◽  
Shunji Kumagai ◽  
...  
Keyword(s):  
Power Generation ◽  
Lead Zirconate Titanate ◽  
Lead Zirconate ◽  
Experimental Results ◽  
Power Generator ◽  
Effective Power ◽  
New Device ◽  
Mode Vibration ◽  
Power Generation Device ◽  
Multi Mode

This paper presents a novel vibration power generation device for vehicles where effective power generation can be obtained by multi-mode vibration of the vehicles. First, road tests of the vehicle are performed, and then the obtained data is analyzed. Next, a vibration power generation device specially designed for the vehicle is proposed. This new device is composed of the multiple masses and spring plates equipped with lead zirconate titanate (PZT), and is effective in multi-mode vibration. The validity of the developed device is confirmed by the simulation and experimental results.

Multi-Layer Thermionic-Tunneling Structures for Power Generation

2005 ◽  
Author(s):  
Taofang Zeng
Keyword(s):  
Heat Transfer ◽  
Power Generation ◽  
Electron Transport ◽  
Heat Source ◽  
Heat Sink ◽  
Interface Design ◽  
Thermionic Emission ◽  
Power Generator ◽  
Layer Structures ◽  
Substantial Temperature

A new method for power generation based on nano-engineered interface design with partially filled gap is proposed. The device combines electron thermionic emission and tunneling to enhance electron transport. Thermal radiation and tunneling contribute to heat transfer in the device, which can be minimized using selected materials. The largely reduced heat transfer coupled with use of multi-layer structures enable a substantial temperature difference between heat source and heat sink or two electrodes, thereby maximizing heat source utilization. Detailed analyses are provided for the solid device operating either as a power generator or as a cooler.

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