scholarly journals Power Generation on a Bare Electrodynamic Tether during Debris Mitigation in Space

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Kan Xie ◽  
Fuwen Liang ◽  
Qimeng Xia ◽  
Ningfei Wang ◽  
Zun Zhang ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Conversion ◽  
Energy Conversion Efficiency ◽  
Stable Phase ◽  
Electrodynamic Tether ◽  
Maximum Value ◽  
Battery Design ◽  
Li Ion ◽  
Two Phases ◽  
Debris Mitigation

Power generation can be realized in space when current is induced on a bare electrodynamic tether system. The performance of power generation is discussed based on a debris mitigation mission by numerical simulation in the paper. A Li-ion battery subsystem is used to complete the energy conversion—harvest and supply the energy. The battery can provide 10–300 W average electric power continuously during several hundred hour mission time. The energy conversion efficiency ranges from 1% to a maximum value 30%. With constant power consumption on board, the battery operation generally experiences a discharging phase, a charging phase, and a stable phase. The first two phases determine the mission risk coefficient. The heating problem in the stable phase cannot be ignored. The optimization of battery design and tether design should be considered for each debris mitigation mission. An extra control circuit or small battery voltage with large capacity for battery design is suggested to eliminate the stable phase. Wide or long tether designs are more appropriate for mission with high or low power demands on board, respectively. The power generation is affected by the system mass and the mission orbit parameters.

Metal-like electrical conductivity in LaxSr2−xTiMoO6 oxides for high temperature thermoelectric power generation

2017 ◽  
Vol 46 (18) ◽  
pp. 5872-5879 ◽  
Author(s):  
Mandvi Saxena ◽  
Tanmoy Maiti
Keyword(s):  
Power Generation ◽  
Electrical Conductivity ◽  
High Temperature ◽  
Energy Conversion ◽  
Thermoelectric Power ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Power Generators ◽  
Thermoelectric Power Generation

Increasing electrical conductivity in oxides, which are inherently insulators, can be a potential route in developing oxide-based thermoelectric power generators with higher energy conversion efficiency.

Study on the giant magnetostrictive vibration-power generation method for battery-less tire pressure monitoring system

2014 ◽  
Vol 229 (9) ◽  
pp. 1639-1651 ◽  
Author(s):  
Huifang Liu ◽  
Shijie Wang ◽  
Yu Zhang ◽  
Wenguo Wang
Keyword(s):  
Power Generation ◽  
Energy Conversion ◽  
Monitoring System ◽  
Power Supply ◽  
Output Voltage ◽  
Energy Conversion Efficiency ◽  
Pressure Monitoring ◽  
Tire Pressure ◽  
Giant Magnetostrictive Material ◽  
Tire Pressure Monitoring System

At present, the most convenient and effective method for ensuring air pressure inside automobile tires being kept in normal state is using a tire pressure monitoring system to monitor the tire’s interior pressure and temperature in real time. Aiming at the power supply problem of direct tire pressure monitoring system in automobile industry commonly, a new giant magnetostrictive vibration-power generation technology which generates electricity through collecting vibration energy in automobile is proposed. Based on the coupling effect of inverse magnetostrictive effect and Faraday electromagnetic effect, a power generation device prototype which uses giant magnetostrictive material as the core element is developed. It may be a prototype of giant magnetostrictive vibration-power generation module used to provide electricity to tire pressure monitoring system instead of button battery power supply mode. In order to accurately describe the relationship between vibration force (stress) and output voltage in the giant magnetostrictive vibration-power generation process, a mathematical model is established from the essence of inverse magnetostrictive effect. According to energy conversion process generated in the process of power generation using giant magnetostrictive material, the modeling process is divided into two parts. Moreover, in order to derive the energy conversion efficiency of giant magnetostrictive vibration-power generation device, a computing method of power generation efficiency is proposed. Experiment results show that the model can accurately describe the relationship between vibration force (stress) and output voltage. Amplitude of the output voltage generated by giant magnetostrictive vibration-power generator is proportional to the amplitude or frequency of vibration force approximately. For the giant magnetostrictive vibration-power generation prototype developed in this paper, its energy conversion efficiency reaches 32.6%. Research result provides an effective method for solving the power supply issue of tire pressure monitoring system. It plays a certain promoting role for the realization of battery-less tire pressure monitoring system.

scholarly journals Influence of Buoy Size on Accelerated Wave Power Generation Device

2021 ◽  
Vol 271 ◽  
pp. 01023
Author(s):  
Hu Chen ◽  
Zhifei Ji ◽  
Yusheng Hu ◽  
Min Lin
Keyword(s):  
Power Generation ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Wave Energy ◽  
Energy Conversion Efficiency ◽  
Wave Energy Conversion ◽  
Generation System ◽  
Power Generation System ◽  
Wave Energy Conversion Efficiency ◽  
Power Generation Performance

This paper proposed a pulley-buoy accelerated wave energy linear power generation system, and the feasibility and effectiveness of this system were verified through experimental research. Compared with the traditional wave energy power generation system with three-stage energy conversion links, the pulley-buoy accelerated wave energy linear power generation system omits the intermediate energy transfer and conversion link, and realizes the direct gain of electric energy from the buoy movement caused by wave, and by introducing the pulley combination, the movement speed of the buoy is enlarged, the power generation of the linear power generation system is increased, thereby the wave energy conversion efficiency of the system is improved. Under laboratory conditions, a small-size pulley-buoy accelerated wave energy linear power generation system prototype and a swing-plate wave-making system were built to explore the effects of different buoy sizes on the power generation performance of the system. The test results show that within the research scope of this paper, increasing the size of the buoy can effectively increase the wave energy conversion efficiency of the system and improve the power generation performance of the accelerated wave energy power generation system. The research results in this paper provide useful experience for the practical application and efficient operation of wave energy power generation systems.

The Comparative Analysis of the Stratospheric Airship Power Supply System

2014 ◽  
Vol 1008-1009 ◽  
pp. 82-86
Author(s):  
Cui Zhang ◽  
Kai Qiao ◽  
Lei Wu
Keyword(s):  
Fuel Cells ◽  
Energy Conversion ◽  
Power Supply ◽  
Power Supply System ◽  
Energy Conversion Efficiency ◽  
Supply System ◽  
Li Ion Battery ◽  
Stratospheric Airship ◽  
Li Ion ◽  
Solar Batteries

The recycling energy problem is one of the key problems of the Stratospheric Airship. This paper analyzes the “night power supply system” of the Stratospheric Airship combining the energy storage device and its corresponding solar batteries. Compared with the Li-ion battery, Regenerative Fuel Cells have low energy conversion efficiency, resulting that the solar batteries combined with them for “night power supply system” have to be much heavier. Unless the specific energy and energy conversion efficiency of the Regenerative Fuel Cells improve obviously, it will not show much progress compared to Li-ion battery.

Design an Economy Cooling System for the Solar Panel

2014 ◽  
Vol 931-932 ◽  
pp. 1078-1082 ◽  
Author(s):  
Warachit Phayom ◽  
Apichai Namahima
Keyword(s):  
Power Generation ◽  
Energy Conversion ◽  
Water Flow ◽  
Conversion Efficiency ◽  
Flow Rate ◽  
Cooling System ◽  
Water Flow Rate ◽  
Energy Conversion Efficiency ◽  
Solar Panel ◽  
Working Fluid

This study was for design an economy cooler for increasing energy conversion efficiency of solar panel. Acrylic plastic was used to be material of the cooler and water was a working fluid in the system. The cost to build the cooler model was around 400 Baht. The results found, using cooling system increased energy conversion efficiency and power generation, especially, water flow rate at 200 ccm. At 200 ccm of water flow rate, it increased 0.52% of energy conversion efficiency and 18.01% of power generation. Thus this flow rate was the best condition for increasing energy conversion efficiency. It might due to this flow rate was not slow and was not that fast to absorb heat from solar panel.

Current progress and performance improvement of Pt/C catalysts for fuel cells

2020 ◽  
Vol 8 (46) ◽  
pp. 24284-24306
Author(s):  
Xuefeng Ren ◽  
Yiran Wang ◽  
Anmin Liu ◽  
Zhihong Zhang ◽  
Qianyuan Lv ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Energy Conversion ◽  
Performance Improvement ◽  
Electric Energy ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Carnot Cycle ◽  
High Energy Conversion Efficiency ◽  
And Performance

Fuel cell is an electrochemical device, which can directly convert the chemical energy of fuel into electric energy, without heat process, not limited by Carnot cycle, high energy conversion efficiency, no noise and pollution.

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