Long-term operation stability tests of intermediate and high temperature Ni-based anodes' SOFCs directly fueled with simulated biogas mixtures

2012 ◽  
Vol 37 (21) ◽  
pp. 16680-16685 ◽  
Author(s):  
T. Papadam ◽  
G. Goula ◽  
I.V. Yentekakis
Keyword(s):  
High Temperature ◽  
Stability Tests ◽  
Term Operation ◽  
Operation Stability

Research on the Improvement of OCT Used in Power System

2013 ◽  
Vol 385-386 ◽  
pp. 995-998
Author(s):  
Hong Peng He ◽  
Jun Liu
Keyword(s):  
Power System ◽  
Solenoid Coil ◽  
Broad Application ◽  
Term Operation ◽  
Current Transducer ◽  
Operation Stability ◽  
The Magnetic Field ◽  
Application Prospects ◽  
Optical Structure

Smart grid puts forward higher requirements for measurement equipments, so optical current transducer (OCT) used in power system possess broad application prospects. In this paper, magnetism gathering technology is applied in the design of OCTs optical structure and the magnetism gathering optical structure based on solenoid coil is proposed. Compared with traditional bulk optical structure, this structure simplifies the optical structure significantly. Results of simulation and field operation indicate that this structure can not only enhance the magnetic field created by the measured current significantly, but also improve the long-term operation stability of OCT.

Influence of Creep on Low-Cycle Fatigue Life Assessment of Ultra-Supercritical Steam Turbine Rotor

2014 ◽  
Author(s):  
W. Z. Wang ◽  
J. H. Zhang ◽  
H. F. Liu ◽  
Y. Z. Liu
Keyword(s):  
High Temperature ◽  
Steam Turbine ◽  
Fatigue Damage ◽  
Low Cycle Fatigue ◽  
Turbine Rotor ◽  
High Temperature Creep ◽  
Cycle Fatigue ◽  
Term Operation ◽  
Start Up

Linear damage method is widely used to calculate low-cycle fatigue damage of turbine rotor in the long-term operation without fully considering the interaction between creep and low cycle fatigue. However, with the increase of steam turbine pressure and temperature, the influence of high-temperature creep on the strain distribution of turbine rotor becomes significant. Accordingly, the strain for each start-up or shut-down process is different. In the present study, the stress and strain during 21 iterations of continuous start-up, running and shut-down processes was numerically investigated by using the finite element analysis. The influence of high-temperature creep on low cycle fatigue was analyzed in terms of equivalent strain, Mises stress and low cycle fatigue damage. The results demonstrated that the life consumption of turbine rotor due to low cycle fatigue in the long-term operation of startup, running and shutdown should be determined from the full-time coverage of the load of turbine rotor.

Long Term Operation of Rechargeable High Temperature Solid Oxide Batteries

2014 ◽  
Vol 161 (9) ◽  
pp. A1297-A1301 ◽  
Author(s):  
André Leonide ◽  
Wolfgang Drenckhahn ◽  
Horst Greiner ◽  
Harald Landes
Keyword(s):  
High Temperature ◽  
Solid Oxide ◽  
Term Operation

Durability of bends in high-temperature steam lines under the conditions of long-term operation

2015 ◽  
Vol 62 (4) ◽  
pp. 260-270 ◽  
Author(s):  
N. A. Katanakha ◽  
A. S. Semenov ◽  
L. B. Getsov
Keyword(s):  
High Temperature ◽  
Term Operation ◽  
High Temperature Steam

Nonvolatile Bistable Resistive Switching in Polyimide Bearing Trifluoromethyl Film

NANO ◽  
2017 ◽  
Vol 12 (05) ◽  
pp. 1750055
Author(s):  
Enming Zhao ◽  
Hui Li ◽  
Fengjuan Miao ◽  
Yanmei Sun
Keyword(s):  
Active Layer ◽  
Thermionic Emission ◽  
Memory Device ◽  
Term Operation ◽  
Current Voltage ◽  
Voltage Stress ◽  
Characteristics Analysis ◽  
Device Applications ◽  
Operation Stability

A functional polyimide (CF3 PI) was used as the active layer in our present work for electrical resistive memory device applications. Current–voltage ([Formula: see text]–[Formula: see text]) characteristics analysis on the polyimide memory devices indicates that the polyimide possesses a nonvolatile rewritable flash characteristic with an ON/OFF current ratio of about 104 at the threshold voltage of around [Formula: see text][Formula: see text]V and 3.8[Formula: see text]V. In addition, the device using the CF3 PI as the active layer reveals excellent long-term operation stability with the endurance of reading cycles up to 108 under a voltage pulse and retention times for at least 106[Formula: see text]s under constant voltage stress (1[Formula: see text]V). The conduction mechanisms are elucidated on the basis of the thermionic emission theory and filament conduction.

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