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.

Hybrid System of Proton Exchange Membrane Fuel Cell (PEMFC) with Battery for Portable Power Supply

2018 ◽  
Vol 7 (3.34) ◽  
pp. 542 ◽  
Author(s):  
Prakash Thapa ◽  
Sung Gi Kwon ◽  
Jin Lee ◽  
Gye Choon Park
Keyword(s):  
Fuel Cell ◽  
Hybrid System ◽  
Power Supply ◽  
Power Supply System ◽  
Supply System ◽  
Advanced Technology ◽  
Li Ion Battery ◽  
Battery System ◽  
Li Ion ◽  
Continuous Power

Background/Objectives: The combustion of fossil fuels and increased number of advanced technology leads to the global warming and climate change. So, to reduce the greenhouse gas emission and conserve the energy we need to use green energy like fuel cell and Li-ion battery system. This hybrid system consists of PEM fuel cell stack, Li-ion battery and bidirectional step up converter and can be used stationary as well as mobile equipment like vehicles.Methods/Statistical analysis: For the analysis of hybrid PEMFC/ Li-ion battery power supply system, portable embedded motor is proposed in this paper. The modeling, design, implementation and performance of hybrid system are demonstrate by using experimental results as well as MATLAB/Simulink.Findings: The simulation results shows that hybrid fuel cell-battery system could provide the continuous power to the sudden changing load and protect the devices. The results also shows that, bidirectional controller can successfully control the fuel cell output and maintain the state of charge of battery at a constant level which provides the significant efficiency of the hybrid power supply system and increased the life-cycle of the system more than 35%.Improvements/Applications: To improve the fuel cell system performance we need to provide the favorable conditions of temperature, pressure, humidity and control the flow rate of reactant gausses. Similarly, due to internal resistance, temperature, material used in manufacturing process, charging and discharging strategy reduces the efficiency as well as life of the battery pack. By using proper voltage balancing methodology we can maintain the similar voltage and prevent from irregular charging. 

Using super-capacitor units in the power supply system of re-entry vehicle of a crew transportation spacecraft

2020 ◽  
pp. 84-91
Author(s):  
Egor S. KHAVANOV ◽  
Roman A. BESCHASTNY ◽  
Dmitry A. FATEEV
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Lithium Ion ◽  
Supply System ◽  
Soft Landing ◽  
Energy Storage Devices ◽  
Super Capacitor ◽  
Math Model ◽  
Ion Storage ◽  
Li Ion

The paper presents a configuration for the Power Supply System (PSS) of a Re-entry Vehicle (RV) of a Crew Transportation Spacecraft (CTS) based on expendable batteries and autonomous current sources specially designed to support electrical pulsed loads of CTS RV during descent. The paper reviews some special features of such a configuration. It present a CTS RV PSS option which has hybrid energy storage devices based on Li-ion storage battery and Super-Capacitor Units (SCU) packaged in a single housing. It present a CTS RV PSS option which has Li-ion storage batteries to support steady-state onboard loads and patch cables based on super-capacitors to support pulse loads (initiation of pyros of the CTS RV soft landing thrusters). Schematics have been developed for the patch cable with a super-capacitor unit (SCU–patch cable), which were used to refine its electrical parameters to take into account the highest pulsed load requirements for an RV by constructing a math model of the SCU–patch cable in MATLAB/Simulink and running a series of simulations. The paper presents simulation results drawing conclusions about the practicability of using such a device. Key words: reentry vehicle, patch cable, super-capacitor unit, lithium-ion battery, crew transportation spacecraft, math model.

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