Structural design of large size thermoelectric module and thermoelectric properties of β-FeSi/sub 2/ prepared by thermal spraying

2002 ◽  
Author(s):  
A. Tsutsumi ◽  
K. Kuramoto ◽  
J. Sawazaki ◽  
Y. Makita ◽  
K. Yoshida ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Structural Design ◽  
Thermoelectric Module ◽  
Thermal Spraying ◽  
Large Size

Structural Analysis of Utility Boiler Waterwall

2005 ◽  
Author(s):  
Tae-Woan Kim ◽  
Jae-Cheol Kim ◽  
Suk-Hwan Hwang
Keyword(s):  
Structural Design ◽  
Orthotropic Plate ◽  
Fluid Pressure ◽  
Gas Pressure ◽  
Dead Weight ◽  
Large Size ◽  
Asme Code ◽  
Stress States ◽  
Critical Zones ◽  
Part Model

The safe structural design of boiler waterwalls with various loadings such as dead weight, fluid pressure, gas pressure and thermal differences is an extensive problem demanding the use of sophisticated computation methods due to the complexity of the geometric structure and the large size of the walls. To evaluate the operating reliability of boiler waterwalls, it is essential to know not only overall behavior of the whole structure but also the stress states at the critical zones. In this paper, the structural soundness for the Korea standard 500MW boiler waterwalls is preliminary examined. The equivalent orthotropic plate model is used to investigate the structural behavior of boiler waterwalls under thermal differences. Submodeling technique for part model of boiler waterwalls is proposed to accurately compute stresses of waterwalls at the critical zones under gas pressure. The computed stresses are combined and finally compared with the allowable stress limits according to the criteria of ASME Code.

Numerical Investigation on Behaviors of Stiffened Large Suction Cap for Offshore Suction Cofferdam

2020 ◽  
Author(s):  
Jeongsoo Kim ◽  
Yeon-Ju Jeong ◽  
Min-Su Park ◽  
Sunghoon Song
Keyword(s):  
Finite Element ◽  
Structural Design ◽  
Nonlinear Finite Element ◽  
Finite Element Models ◽  
Suction Pressure ◽  
Sheet Pile ◽  
Large Size ◽  
Critical Issues ◽  
Stress And Deformation ◽  
Pile Type

Abstract This study introduces a large offshore cofferdam installed by suction, unlike conventional ones such as a sheet-pile type, and proposes an effective suction cap for the cofferdam. In structural design view of the cofferdam, there are several critical issues due to its large size. This study conducted structural analyses of stiffened caps for large offshore suction cofferdam using fully nonlinear finite element models, and analyzed changes in behaviors of the cap due to stiffener arrangements to provide design insights. For finite element models, the diameter and the thickness of the suction cap (circular plate only) are 20m and 0.07m, respectively. Suction pressure on the cap was assumed to be 100kPa, all parts of the cofferdam except the cap are considered as boundary conditions. By investigating conventional suction anchors, several stiffener arrangement patterns on the cap of suction cofferdam were derived, and each arrangement was estimated by comparing stress and deformation of the cap. Also, reaction distributions on the edge of the cap were investigated to analyze effects of the stiffener arrangement on the interface behaviors between cap and cofferdam.

A Novel Structural Design of Heat-Dissipation Method for High Brightness LED Lighting with Thermoelectric Chip Module

2014 ◽  
Vol 1051 ◽  
pp. 823-827
Author(s):  
Ching Wu Wang ◽  
Ti Chun Yeh ◽  
Kai Chun Lin ◽  
Kuan Hsun Chen ◽  
Wei Chih Wang ◽  
...  
Keyword(s):  
Heat Conduction ◽  
Layered Structure ◽  
Structural Design ◽  
Heat Dissipation ◽  
Waste Heat ◽  
Thermoelectric Module ◽  
Heat Absorption ◽  
High Brightness ◽  
Led Lighting ◽  
Novel Structure

In various traditional technologies of solving the heat-dissipation problem for LED, all of these methods exhaust the waste heat into the environment and cause the more serious greenhouse effect. In this article, we present a new heat-dissipation method for high brightness 10W LED bulb using a novel structure of thermoelectric chip module. Evidence illustrates that graphite performs both the best heat-absorption material as well as the superior heat-dissipation material for LED thermoelectric chip module. Besides, the double-layered structure with graphite as heat-conduction material of LED thermoelectric module could create the most temperature-difference and thus conduct the highest output power. It implies that double-layered structure of LED thermoelectric chip module with graphite as heat-conduction material is the optimal structure for heat-dissipation of 10W LED bulb.

PEDOT:PSS and Ni-based thermoelectric generator for solar thermal energy conversion

2020 ◽  
Vol 8 (11) ◽  
pp. 3914-3922
Author(s):  
Kai Feng ◽  
Ling Xu ◽  
Yan Xiong ◽  
Lin Sun ◽  
Huayang Yu ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Thermoelectric Properties ◽  
Thermal Energy ◽  
Power Factor ◽  
Thermoelectric Generator ◽  
Thermoelectric Module ◽  
Conversion Process ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion

We used an inexpensive and effective way to improve the thermoelectric properties of PEDOT:PSS, which has the highest power factor of up to 330.597 μW m−1. Overall data shows that the Ni film is relatively stable as an n-type material, with Ni as an n-leg in the thermoelectric module. We fabricated a thermoelectric generator to explore the photothermal conversion process of solar energy.

Improvement of Box-Type Substation for Port

2013 ◽  
Vol 291-294 ◽  
pp. 2393-2396
Author(s):  
Dong Sheng Song ◽  
Li Wei Yan
Keyword(s):  
Power Supply ◽  
Structural Design ◽  
Power Supply System ◽  
Supply System ◽  
Environmental Suitability ◽  
Large Size

It indicates problems existing in ZB series substations of current power supply system at port, such as large size and improper structural design, poor power supply security and unsuitability to environment of the port, etc. It proposes solutions to improve the structure, security of box-type substation and environmental suitability, etc, which can solve the problems existing in current port power supply system.

Structural Design of Large Size Measuring Machine Base on Electro-Optic Automatic Detection

2014 ◽  
Vol 635-637 ◽  
pp. 768-771
Author(s):  
Wei Li ◽  
Feng Xiao Huang ◽  
Hong Liang Zhao ◽  
Xiao Yan Qi
Keyword(s):  
Structural Design ◽  
Large Scale ◽  
Automatic Detection ◽  
Measuring Technique ◽  
Large Size ◽  
Electro Optic ◽  
Development Direction ◽  
Main Development ◽  
Measuring Machine ◽  
Machine Base

As a result of the large-scale components' measuring environment complex, the workers measuring operation not reliably and so on factor influences, uses the non-contact electro-optic measuring technique is the main development direction of the large size components measuring. In this paper, iron tower component is taken as measuring object, online automatic detection is aimed to achieve, and the system frame is constructed to carry out electro-optic automatic detection of the iron tower component, then designing of large size examination machine will be accomplished.

Thermoelectric Properties and Electronic Structures of CuTi2S4 Thiospinel and Its Derivatives: Structural Design for Spinel-Related Thermoelectric Materials

2019 ◽  
Vol 58 (2) ◽  
pp. 1425-1432 ◽  
Author(s):  
Katsuaki Hashikuni ◽  
Koichiro Suekuni ◽  
Hidetomo Usui ◽  
Raju Chetty ◽  
Michihiro Ohta ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
Structural Design ◽  
Electronic Structures

Thermoelectric Properties and Magnetic Anisotropies of Magnetically Grain-Oriented Sr- or Bi-doped Ca3Co4O9 Thick Films

2007 ◽  
Vol 1044 ◽  
Author(s):  
Shigeru Horii ◽  
Yuhya Yamasaki ◽  
Masayuki Sakurai ◽  
Ryoji Funahashi ◽  
Tetsuo Uchikoshi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Anisotropy ◽  
Thermoelectric Properties ◽  
Thick Films ◽  
Thermoelectric Module ◽  
Milling Process ◽  
Type Layer ◽  
Doping Effects ◽  
Bi Doping ◽  
Average Size

AbstractWe report magnetic properties of [Ca2CoO3-δ]0.62CoO2 (Ca349) powders with various average size and the Bi- and Sr-doping effects on thermoelectric properties for the magnetically grain-aligned and densified Ca349 thick films. Magnetic anisotropy at 300 K depended on the initial average size of Ca349 powders and decreased with the decrease in the size. This presumably suggests that distortion of crystal structure was induced by a ball-milling process and led to the change of magnetic anisotropy. On the Bi- and Sr-doping effects, an obvious enhancement of thermoelectric properties did not emerge in the case of the Sr-doping, whereas the enhancement was observed for the Bi-doped Ca349 thick films. However, a drastic decrease of magnetic anisotropy was caused by the Bi-doping. For usage of the p-type layer in multilayered thermoelectric module, tuning of the Bi-doping levels in which both enhancement of thermoelectric properties and a certain level of magnetic anisotropy are achieved is required.

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