scholarly journals High temperature high velocity direct power extraction using an open-cycle oxy-combustion system

2017 ◽  
Author(s):  
Norman Love
Keyword(s):  
High Temperature ◽  
High Velocity ◽  
Combustion System ◽  
Direct Power ◽  
Power Extraction ◽  
Open Cycle

scholarly journals Heat Transfer Characterization Methodology for an Oxy-Fuel Direct Power Extraction Combustion System

2018 ◽  
Vol 34 (5) ◽  
pp. 1313-1322
Author(s):  
Luisa Cabrera Maynez ◽  
Ahsan Choudhuri ◽  
Norman Love
Keyword(s):  
Heat Transfer ◽  
Combustion System ◽  
Direct Power ◽  
Power Extraction

scholarly journals Effect of SiO2 Dispersion on Chlorine-Induced High-Temperature Corrosion of High-Velocity Air-Fuel Sprayed NiCrMo Coating

CORROSION ◽  
10.5006/2802 ◽  
2018 ◽  
Vol 74 (9) ◽  
pp. 984-1000 ◽  
Author(s):  
Esmaeil Sadeghi ◽  
Nicolaie Markocsan ◽  
Tanvir Hussain ◽  
Matti Huhtakangas ◽  
Shrikant Joshi
Keyword(s):  
High Temperature ◽  
Oxide Scale ◽  
Corrosion Product ◽  
Weight Change ◽  
High Velocity ◽  
Short Circuit ◽  
High Temperature Corrosion ◽  
Lower Weight ◽  
Short Circuit Diffusion ◽  
Highly Porous

NiCrMo coatings with and without dispersed SiO2 were deposited using high-velocity air-fuel technique. Thermogravimetric experiments were conducted in 5% O2 + 500 vppm HCl + N2 with and without a KCl deposit at 600°C for up to 168 h. The SiO2-containing coating showed lower weight change as a result of formation of a protective and adherent Cr-rich oxide scale. SiO2 decelerated short-circuit diffusion of Cr3+ through scale’s defects, e.g., vacancies, and promoted the selective oxidation of Cr to form the protective Cr-rich oxide scale. Furthermore, the presence of SiO2 led to less subsurface depletion of Cr in the coating, and accordingly less corrosion of the substrate. The formed corrosion product on the SiO2-free coating was highly porous, non-adherent, and thick.

Component and System Modeling of a Direct Power Extraction System

2016 ◽  
Author(s):  
Omar Vidana ◽  
Mariana Chaidez ◽  
Brian Lovich ◽  
Jad Aboud ◽  
Manuel J. Hernandez ◽  
...  
Keyword(s):  
System Modeling ◽  
Extraction System ◽  
Direct Power ◽  
Power Extraction

Performance Results With ALSTOM’s Circulating Moving Bed Combuster™

2003 ◽  
Author(s):  
Glen Jukkola ◽  
Armand Levasseur ◽  
Dave Turek ◽  
Bard Teigen ◽  
Suresh Jain ◽  
...  
Keyword(s):  
High Temperature ◽  
Test Facility ◽  
Working Fluid ◽  
Massachusetts Institute Of Technology ◽  
Combustion System ◽  
Moving Bed ◽  
Program Cost ◽  
Capital Costs ◽  
Institute Of Technology ◽  
Performance Results

ALSTOM is developing and testing a new and more efficient coal combustion technology, including a new type of steam generator known as a “circulating moving bed (CMBTM) combustion system combustor.” The CMBTM combustion system technology involves a novel method of solid fuel combustion and heat transfer. In this design, a heat exchanger will heat the energy cycle working fluid, steam or air, to the high temperature levels required for advanced power generation systems. This will produce a step change in both performance and capital costs relative to today’s pulverized coal and fluid bed boiler designs. In addition to high temperature Rankine cycles, the CMBTM combustion system is an enabling technology for hydrogen production and CO2 capture from combustion systems utilizing innovative chemical looping airblown gasification and syngas decarbonization. ALSTOM’s 3MWth Multi-Use Combustion Test Facility has been modified to allow operation in CMBTM combustion system mode. This paper summarizes the results of this program, which includes performance results from pilot plant testing. Participants include the U.S. DOE, ALSTOM, the University of Massachusetts, and the Massachusetts Institute of Technology. The total program cost is $2,485,468 with the DOE’s National Energy Technology Laboratory (NETL) providing 60% of the funding under Cooperative Agreement No. DE-FC26-01NT41223.

High Temperature Erosion Properties of Thermal Barrier Coatings Produced by Acetylene Sprayed High Velocity Oxygen Fuel Process

2000 ◽  
Author(s):  
M.A. Cole ◽  
R. Walker
Keyword(s):  
High Temperature ◽  
Thermal Barrier Coatings ◽  
High Velocity ◽  
Thermal Barrier ◽  
High Velocity Oxygen Fuel ◽  
Hvof Spraying ◽  
Powder Morphology ◽  
Fuel Gas ◽  
Barrier Coatings ◽  
Oxygen Fuel

Abstract Over the past 30 years, there has been considerable interest in the development of thermally sprayed thermal barrier coatings (TBCs) for aerospace and land based turbine applications. The use of TBCs enables higher operating temperatures, resulting in significant fuel efficiency savings. This paper reports on the development of dense Yttria Stabilised Zirconia (YSZ) thermal barrier coatings produced by High Velocity Oxygen Fuel (HVOF) spraying using acetylene as the fuel gas. The use of a high temperature gas erosion rig allowed the controlled evaluation of erodent size, velocity, impact angle, and temperature on coating performance. The work also covers the optimization of process parameters, including powder morphology, stand-off distance, oxygen to fuel ratio, gas pressures, and flowrates, and their effect on coating characteristics such as deposition efficiency, microhardness, and surface roughness.

A High Velocity, High Temperature Injection Injury

1993 ◽  
Vol 18 (2) ◽  
pp. 249-250 ◽  
Author(s):  
M. ALMIND ◽  
L. BROENG
Keyword(s):  
High Temperature ◽  
High Velocity ◽  
Index Finger ◽  
Injection Injury ◽  
The Right

A case of high velocity, high temperature injection injury to the right index finger during welding is reported.

Sign in / Sign up

Export Citation Format

Share Document