scholarly journals Multifunctional Nanowire/film Composites based Bi-modular Sensors for In-situ and Real-time High Temperature Gas Detection

2013 ◽  
Author(s):  
Pu-Xian Gao ◽  
Yu Lei
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Gas Detection ◽  
High Temperature Gas ◽  
Film Composites

scholarly journals Tracing Phase Transformation and Lattice Evolution in a TRIP Sheet Steel under High-Temperature Annealing by Real-Time In Situ Neutron Diffraction

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 360 ◽  
Author(s):  
Dunji Yu ◽  
Yan Chen ◽  
Lu Huang ◽  
Ke An
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Neutron Diffraction ◽  
Real Time ◽  
Retained Austenite ◽  
Sheet Steel ◽  
Carbon Diffusion ◽  
Structure Evolution ◽  
In Situ Neutron Diffraction

Real-time in situ neutron diffraction was used to characterize the crystal structure evolution in a transformation-induced plasticity (TRIP) sheet steel during annealing up to 1000 °C and then cooling to 60 °C. Based on the results of full-pattern Rietveld refinement, critical temperature regions were determined in which the transformations of retained austenite to ferrite and ferrite to high-temperature austenite during heating and the transformation of austenite to ferrite during cooling occurred, respectively. The phase-specific lattice variation with temperature was further analyzed to comprehensively understand the role of carbon diffusion in accordance with phase transformation, which also shed light on the determination of internal stress in retained austenite. These results prove the technique of real-time in situ neutron diffraction as a powerful tool for heat treatment design of novel metallic materials.

La0.67Sr0.33MnO3 nanofibers for in situ, real-time, and stable high temperature oxygen sensing

RSC Advances ◽  
2012 ◽  
Vol 2 (9) ◽  
pp. 3872 ◽  
Author(s):  
Yixin Liu ◽  
Yu Ding ◽  
Haiyong Gao ◽  
Lichun Zhang ◽  
Puxian Gao ◽  
...  
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Oxygen Sensing

Adaptive Process Control and In-Situ Diagnostics for High Temperature PEM MEA Manufacturing

2010 ◽  
Author(s):  
Justin Gullotta ◽  
Lakshmi Krishnan ◽  
Dylan Share ◽  
Daniel Walczyk ◽  
Raymond Puffer
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Complex Impedance ◽  
Impedance Measurement ◽  
Proton Exchange ◽  
Unit Process ◽  
Adaptive Process ◽  
In Situ Diagnostics ◽  
High Temperature Pem

The most critical step in high temperature proton exchange membrane (PEM) MEA manufacturing is sealing of the membrane between the two electrodes. This sealing process is typically conducted using a precision hydraulic thermal press. In order to achieve cost-effective high-volume MEA manufacturing, it is important to reduce the variability in MEA performance due to variations in incoming material properties and dimensions, and to reduce the unit process cycle time. This paper explains the application of real time adaptive process controls (APC) combined with effective in-situ diagnostics during the MEA sealing process to achieve greater uniformity and performance of high temperature PEM MEAs. The in-situ impedance measurement is carried out in a precision thermal press using a milliohmmeter by reading the complex impedance of the MEA at 1 kHz as the components of the MEA are sealed. This signal is then used to adjust the pressing process parameters in real time to achieve more uniform MEA performance. An experiment was carried out in an attempt to identify the impedance parameter which correlated most closely with the MEA’s future performance. Using these impedance parameters during pressing, we are able to reliably produce MEAs using the real time APC technique that perform consistently in a single cell test fixture with more than a 50% reduction in pressing time.

An in situ x-ray absorption spectroscopic cell for high temperature gas-flow measurements

1998 ◽  
Vol 69 (7) ◽  
pp. 2618-2621 ◽  
Author(s):  
George Meitzner ◽  
Simon R. Bare ◽  
Deborah Parker ◽  
Hyung Woo ◽  
Daniel A. Fischer
Keyword(s):  
High Temperature ◽  
Gas Flow ◽  
Flow Measurements ◽  
X Ray ◽  
X Ray Absorption ◽  
High Temperature Gas

scholarly journals Integration of High Temperature Gas Reactors with in Situ Oil Shale Retorting

2012 ◽  
Vol 61 (1T) ◽  
pp. 452-457
Author(s):  
Eric P. Robertson ◽  
Michael G. McKellar ◽  
Lee O. Nelson
Keyword(s):  
High Temperature ◽  
Oil Shale ◽  
High Temperature Gas

Reduce Fuel Costs and NOx Emissions by Controlling Excess Oxygen in the Firebox

2005 ◽  
Author(s):  
Gary A. Lang ◽  
Brien Knight ◽  
Paul Barker
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Combustion Process ◽  
Radiant Heat ◽  
Oxygen Sensors ◽  
Excess Oxygen ◽  
Nox Emissions ◽  
Oxygen Measurement ◽  
Fuel Costs

The real time, in-situ measurement of excess oxygen and temperature in the radiant heat zone of a boiler or furnace provides a window for viewing combustion conditions closest to the source. Excess oxygen and temperature measurements, taken at strategic sample points around the firebox, provide timely information for optimal trim control of the combustion process. With fuel costs skyrocketing and a focus on reducing NOx emissions, it is essential that the excess oxygen measurement be fast and accurate. Commercially available in-situ, high temperature oxygen sensors have the potential to solve combustion control and burner management problems with short payback and high annual ROI in power applications.

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