515 Electric characteristic and performance in high temperature and high pressure of Direct Dimethyl ether Fuel Cell(DDFC)

2007 ◽  
Vol 2007 (0) ◽  
pp. 127-128
Author(s):  
Tadao Haraguchi ◽  
Tomohiro Adachi
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Fuel Cell ◽  
Dimethyl Ether ◽  
Electric Characteristic ◽  
And Performance

Structural Integrity and Mechanical Design of a Probe of High Pressure and High Temperature for Oil Wells Applying Finite Elements Tools

2014 ◽  
Author(s):  
Erik Rosado Tamariz ◽  
Rito Mijarez Castro ◽  
Agustín Javier Antúnez Estrada ◽  
Alfonso Campos Amezcua ◽  
David Pascacio Maldonado ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Structural Integrity ◽  
Mechanical Design ◽  
Pressure Vessels ◽  
Oil Wells ◽  
Principal Stresses ◽  
Commercial Code ◽  
And Performance ◽  
Mechanical Elements

Measurement of high pressure and high temperature (HPHT) tools is regularly carried out in the hydrocarbons sector to determine not only the characteristics and performance of fluids inside the well, but also to evaluate the mechanical condition of the pipes and the automation of production. The mechanical features of these tools are significantly influenced by the mechanical design of the structure, which eventually affects their performance and integrity. This paper describes the design process and the analysis of the structural integrity of a HPHT measuring tool for oil wells in its sensors section. The classical theories of mechanical design and specifications of the ASME boilers and pressure vessels code were used. The study is performed for several operation variables in a numerical model using a commercial code of finite element method to determinate the maximum principal stresses, total displacements and safety factor in the mechanical elements that form the device. The numerical results were compared with the experimental data source from the laboratory tests.

Ethanol and dimethyl ether steam reforming on Rh/Al2O3 catalysts for high-temperature fuel-cell feeds

2011 ◽  
Vol 104 (1) ◽  
pp. 75-87 ◽  
Author(s):  
E. Gucciardi ◽  
V. Chiodo ◽  
S. Freni ◽  
S. Cavallaro ◽  
A. Galvagno ◽  
...  
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Dimethyl Ether ◽  
Steam Reforming

scholarly journals Optimized High Temperature PEM Fuel Cell & High Pressure PEM Electrolyser for Regenerative Fuel Cell Systems in GEO Telecommunication Satellites

2017 ◽  
Vol 16 ◽  
pp. 10004
Author(s):  
Jarle Farnes ◽  
Dmitry Bokach ◽  
Sander ten Hoopen ◽  
Kim Skåtun ◽  
Max Schautz ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Fuel Cell ◽  
Pem Fuel Cell ◽  
Cell Systems ◽  
Regenerative Fuel Cell ◽  
High Temperature Pem

scholarly journals Numerical Simulation and Design of a High-Temperature, High-Pressure Fluid Transport Pipe

2020 ◽  
Vol 10 (17) ◽  
pp. 5890
Author(s):  
Jiyoung Yoon ◽  
Junkyu Park ◽  
Jinhyoung Park
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
High Pressure ◽  
High Temperature ◽  
Low Temperature ◽  
Fluid Transport ◽  
Projectile Velocity ◽  
Gas Leakage ◽  
And Performance ◽  
High Temperature High Pressure

When designing a hand caliber with a high-temperature, high-pressure internal fluid transport pipe, reliability, safe use, and performance must be considered. Reliability refers to the stress caused by thermo-mechanical load; safe use refers to the low-temperature burns that might occur upon contact, and high-temperature burns caused by gas leakage occurring in the cylinder gap; and performance refers to projectile velocity. In this study, numerical simulation methods for heat transfer, structure analysis, and gas leakage are proposed so that solutions can be designed to account for the above three criteria. Furthermore, a hand-caliber design guide is presented. For heat transfer and structural analysis, mesh size, the transient convective heat transfer coefficient, and boundary conditions are described. Regarding gas leakage, methods reflecting projectile motion and determination of the molecular weight of the propellant are described. As a result, a designed hand caliber will have a high reliability, because the thermo-mechanical stress is lower than the yield stress. There will be little risk of low-temperature burns, but there will be a high temperature-burn risk, owing to gas leakage in the cylinder gap. The larger the cylinder-gap size, the greater the gas leakage and the smaller projectile velocity. The presented numerical simulation method can be applied to evaluate various aspects of other structures that require high-temperature, high-pressure fluid-transport pipes.

Performance Stability in High Temperature and High-Pressure Operation of a Diemethyl-ether Fuel Cell

2003 ◽  
Vol 2003 (0) ◽  
pp. 225-226
Author(s):  
Minoru SAITO ◽  
Tadao HARAGUCHI ◽  
Hideo SUZUKI ◽  
Yasuyuki TSUTSUMI ◽  
Susumu YAMASHITA ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Fuel Cell

Usage of Nano Silica in Synthetic Based Mud: A Comparison Study for High Temperature High Pressure Well

2015 ◽  
Vol 789-790 ◽  
pp. 80-84
Author(s):  
Muhammad Aslam Md Yusof ◽  
Norazwan Wahid ◽  
Nor Hazimastura Hanafi
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Prolonged Exposure ◽  
Comparison Study ◽  
Nano Silica ◽  
Nanoparticles Concentration ◽  
And Performance ◽  
20 Nm ◽  
Rheology Modifier ◽  
High Temperature High Pressure

Synthetic based mud has been widely used in the drilling operation because of its good properties. However, prolonged exposure of the mud in high temperature causes degradation of the good mud properties because of chemical instability. Because of that concern, this study intends to improve the performance of SBM with nanosilica at different concentration in high temperature high pressure (HTHP) applications. nanosilica with size of 10-20 nm has been selected for this study. The involving parameters in this study include the manipulation of nanoparticles concentration by total mud weight between 0 to 1.78 wt. %, and performance at temperature up to 350°F. The enhanced formulation has given significant benefits by reducing the filtration up to 41.67% and act as the rheology modifier in HTHP condition. Moreover, the optimum amount of nanosilica is 0.71% of total mud weight to avoid further rheological and filtration degradation.

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