Vibration/Shock-Tolerant Capillary Two-Phase Loop Technology for Vehicle Thermal Control

2008 ◽  
Author(s):  
Xudong Tang ◽  
Chanwoo Park
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Thermal Control ◽  
Small Scale ◽  
Manufacturing Cost ◽  
Two Phase ◽  
Loop Heat Pipes ◽  
Military Vehicles ◽  
Phase Loop

Two-phase thermal management technologies are promising cooling solutions for the high performance electronics in the next generation military and commercial vehicles. However, vibrations (∼ 10Grms in commercial automobile engines and transmissions) and shocks (30G to 1,200G in military combat vehicles, caused by gun firing, ballistic launch and abrupt maneuvering) present a severe challenge to any capillary-driven (i.e., passive) two-phase devices. A low-cost, vibration/shock-tolerant Capillary Two-Phase Loop (CTPL) technology was developed as a cooling alternative for the future military vehicles. Unlike the traditional two-phase cooling loops such as Loop Heat Pipes (LHP) and Capillary Pumped Loops (CPL), the CTPL offers the following advantages: (1) lower manufacturing cost by sintering the evaporator wick in-situ; (2) improved tolerance to vibrations and shocks due to the improved mechanical strengths of the in-situ sintered wick; (3) improved heat flux performance because of the non-inverted meniscus wick. Small-scale proof-to-concept CTPL prototypes were successfully tested up to 120W of heat input and under multiple, consecutive shocks of up to 6.6G.

A novel 3D porous electrode of polyaniline and PEDOT:PSS coated SiNWs for low-cost and high-performance supercapacitors

2021 ◽  
Author(s):  
Xiaojuan Shen ◽  
Xuan Zhang ◽  
Tongfei Wang ◽  
Songjun Li ◽  
Zhaoqiang Li
Keyword(s):  
High Performance ◽  
Solution Method ◽  
In Situ Polymerization ◽  
Low Cost ◽  
Porous Electrode ◽  
Simple Solution ◽  
Porous Si ◽  
Supercapacitor Electrode

In this study, a novel 3D porous Si-based supercapacitor electrode was developed by the simple solution method, which involved firstly the in-situ polymerization of polyaniline particles (PANI) on the Si...

Applying multi-scale silica-like three-dimensional networks in PEO matrix via in-situ crosslinking for high-performance solid composite electrolyte

2021 ◽  
Author(s):  
Jiawei Wu ◽  
Jing Chen ◽  
Xiaodong Wang ◽  
An'an Zhou ◽  
Zhenglong Yang
Keyword(s):  
Solid State ◽  
High Performance ◽  
Low Cost ◽  
Three Dimensional ◽  
Electrochemical Stability ◽  
Composite Electrolyte ◽  
Solid State Electrolyte ◽  
Multi Scale ◽  
In Situ Crosslinking

For the higher safety and energy density, solid-state electrolyte with better mechanical strength, thermal and electrochemical stability is a perfect choice. To improve the performance of PEO, usage of low-cost...

Concurrent Tolerance Design Based on Manufacturing Cost and Quality Loss

2014 ◽  
Vol 687-691 ◽  
pp. 4996-4999
Author(s):  
Zhang Rong
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Engineering Application ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Product Loss ◽  
Parameterized Model ◽  
The Cost ◽  
Design And Manufacture

With the constraints on manufacturing capacity, the satisfaction of product performance and the cost of manufacture are contradictory, the problem between high-performance and low-cost must be solved at the period of design and manufacture for product. To solve this problem, the product loss model has been analyzed, the parameterized and non-parameterized model of anticipant losses has been researched, with concurrent design, in connection with the product with multiple correlated assembly functional dimensions, the relation function between quality loss and process dimension tolerance has been provided, the concurrent tolerance design mathematical model based on lowest-cost and quality loss has been established. The applied case shows that this method has important guiding significance for engineering application.

Subsurface iron and arsenic removal: low-cost technology for community-based water supply in Bangladesh

2010 ◽  
Vol 62 (11) ◽  
pp. 2702-2709 ◽  
Author(s):  
D. van Halem ◽  
S. G. J. Heijman ◽  
R. Johnston ◽  
I. M. Huq ◽  
S. K. Ghosh ◽  
...  
Keyword(s):  
Arsenic Removal ◽  
Low Cost ◽  
Iron Hydroxide ◽  
Oxidation Zone ◽  
Small Scale ◽  
Arsenic Adsorption ◽  
Community Based ◽  
Competing Anions ◽  
Tube Well

The principle of subsurface or in situ iron and arsenic removal is that aerated water is periodically injected into an anoxic aquifer through a tube well, displacing groundwater containing Fe(II). An oxidation zone is created around the tube well where Fe(II) is oxidised. The freshly formed iron hydroxide surfaces provide new sorption sites for soluble Fe(II) and arsenic. The system's efficiency is determined based on the ratio between abstracted volume with reduced iron/arsenic concentrations (V) and the injected volume (Vi). In the field study presented in this paper, the small-scale application of this technology was investigated in rural Bangladesh. It was found that at small injection volumes (<1 m3) iron removal was successful and became more effective with every successive cycle. For arsenic, however, the system did not prove to be very effective yet. Arsenic retardation was only limited and breakthrough of 10 μg/L (WHO guideline) was observed before V/Vi=1, which corresponds to arrival of groundwater at the well. Possible explanations for insufficient arsenic adsorption are the short contact times within the oxidation zone, and the presence of competing anions, like phosphate.

Low temperature and high performance ZnSnO thin film transistors engineered by in-situ thermal manipulation

2022 ◽  
Author(s):  
Wengao Pan ◽  
Xiaoliang Zhou ◽  
Qingping Lin ◽  
Jie Chen ◽  
Lei Lu ◽  
...  
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Thin Film Transistors ◽  
High Performance ◽  
Low Cost ◽  
High Mobility ◽  
Processing Temperature ◽  
Practical Application ◽  
Thermal Manipulation

Thin film transistors (TFT) with low cost, high mobility and low processing temperature are key enablers for practical application, which are always contradictory. In this work, we achieved high performance...

scholarly journals An effective technique for constructing wood composite with superior dimensional stability

Holzforschung ◽  
2020 ◽  
Vol 74 (5) ◽  
pp. 435-443
Author(s):  
Xiaoshuai Han ◽  
Zhenxing Wang ◽  
Qinqin Zhang ◽  
Junwen Pu
Keyword(s):  
Mechanical Properties ◽  
Dimensional Stability ◽  
High Performance ◽  
Low Cost ◽  
Sem Analysis ◽  
Wood Composite ◽  
Engineering Structures ◽  
Natural Wood ◽  
Dimensional Instability

AbstractFast-growing wood is an abundant and low-cost material and is widely used for structural building and furniture construction. However, inferior mechanical properties and dimensional instability limit its application in advanced engineering structures. Herein, we developed a simple, effective and “green” method to transform bulk poplar into a high-performance wood composite. The wood composite was prepared by the impregnation of the itaconic acid (IA) solution acting as a grafting anchor into the wood matrix, followed by in situ polymerization of styrene upon heating to form a hydrophobic polymer within the wood scaffold. Scanning electron microscope (SEM) analysis revealed that hydrophobic polystyrene (PS) was deposited in wood cell walls and lumens, leading to a reduced water uptake and remarkably enhanced dimensional stability, as well as generally improved mechanical properties. In addition, the PS generated improvement in the thermal stability of the wood composite in comparison with that of natural wood (W).

In situ growth of MnO2 nanosheets on activated carbon fibers: a low-cost electrode for high performance supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14819-14825 ◽  
Author(s):  
Kai Zhu ◽  
Yu Wang ◽  
Joel A. Tang ◽  
Hailong Qiu ◽  
Xing Meng ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Hydrothermal Method ◽  
Carbon Fibers ◽  
High Performance ◽  
Low Cost ◽  
Activated Carbon Fibers ◽  
In Situ Growth ◽  
Mno2 Nanosheets ◽  
Microwave Assisted

MnO2 nanosheets were successfully grown in situ on the surface of activated carbon fibers (ACFs) via a facile microwave-assisted hydrothermal method.

Research on the Development of Large Application Specific Integrated Circuit Based on SOPC

2011 ◽  
Vol 328-330 ◽  
pp. 1663-1666
Author(s):  
Qing Chen Kong ◽  
Guang Can Zhang ◽  
Yong Xin Li
Keyword(s):  
Integrated Circuit ◽  
High Performance ◽  
Low Cost ◽  
Small Scale ◽  
Scale Production ◽  
Development Platform ◽  
Short Development Cycle ◽  
Application Specific Integrated Circuit ◽  
Large Application ◽  
Promising Development

This paper introduces a design of ASIC with the advantages of high performance, low power, low cost and short development cycle, which is especially suitable for the middle and small scale production of complicated large programmable ASIC. Through introducing the performance and latest development of HardCopy series devices and Stratix FPGA series devices, and based on the development platform of Quartus II and Nios II system, this paper analyzes the complete development process of Stratix FPGA and HardCopy ASIC based on SOPC. This paper concludes the seamless transplant from Stratix FPGA to HardCopy ASIC based on the SOPC with IP multiplexing, which is the most promising development direction of producing large programmable ASIC with high performance and low cost in the future.

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