High-Pressure Gelatinization of Barley Starch at Low Moisture Levels and Elevated Temperature

1993 ◽  
Vol 45 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Jukka Vainionpää ◽  
Pirkko Forssell ◽  
Teija Virtanen
Keyword(s):  
High Pressure ◽  
Elevated Temperature

Sufficiency of Reference Stress Solutions for FFS Evaluation of Crack-Like Flaws

2017 ◽  
Author(s):  
Kenji Oyamada ◽  
Naoki Miura
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
Comparative Study ◽  
Assessment Procedure ◽  
Bending Stress ◽  
Draft Guideline ◽  
Membrane Stress ◽  
Reference Stress ◽  
Standard Development

In Japan, a new standard of an assessment procedure for crack-like flaws in pressure equipment at elevated temperature is now under development in the High Pressure Institute of Japan (HPI). In this standard development, it is needed to adopt reference stress solutions for crack-like flaws in pressure equipment being subjected to membrane stress and/or bending stress. Such reference stress solutions have been proposed in various references such as ASME FFS-1/API579-1, BS7910, R5, FBR draft guideline, HPIS Z101-2, etc. A comparative study of those reference stress solutions was conducted in order to select appropriate one. As a result, reference stress solutions in HPIS Z101-2 were adopted. The sufficiency of adopted reference stress solutions was introduced in this paper. Also, the reference stress solutions for axially and circumferentially through-wall rectangular flawed cylinders, which were not provided in the HPIS Z101-2 standard but were utilized to derive those solutions adopted in the standard, were introduced in this paper. These solutions should be adopted in a new HPI standard for crack-like flaws in pressure equipment at elevated temperature.

Hydrogen Storage in Small Size Hollow Microspheres

2012 ◽  
Vol 512-515 ◽  
pp. 1395-1399 ◽  
Author(s):  
Zhan Wen Zhang ◽  
Su Fen Chen ◽  
Yi Yang Liu ◽  
Lin Su ◽  
Mei Fang Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
Hydrogen Storage ◽  
Vapor Deposition ◽  
Mass Fraction ◽  
Hoop Stress ◽  
Hydrogen Gas ◽  
Hollow Microspheres ◽  
Hydrogen Mass ◽  
Pressure Hydrogen

Hollow microspheres with less than 1 millimeter in diameter and several micrometers in wall thickness are attractive for hydrogen storage and transportation. The hollow microspheres can be made by drop tower technique, microencapsulation and vapor deposition methods. By immersion in high pressure hydrogen for a period of time at elevated temperature, the hollow microspheres can be filed with hydrogen gas at pressures up to one hundred MPa. The hydrogen mass fraction can be varied from 1% to 10% for hollow microspheres with different membrane hoop stress at failure.

Advances in Computation of Temperature-Pressure Phase Diagrams of High-Pressure Nitrides

2008 ◽  
Vol 403 ◽  
pp. 77-80 ◽  
Author(s):  
Peter Kroll
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Elevated Temperature ◽  
Total Energy ◽  
Phase Diagrams ◽  
High Pressures ◽  
First Principle ◽  
Energy Calculations ◽  
High Pressure High Temperature ◽  
Pressure Phase

A combination of first-principle and thermochemical calculations is applied to compute the phase diagrams of rhenium-nitrogen and of ruthenium-nitrogen at elevated temperature and high pressure. We augment total energy calculations with our approach to treat the nitrogen fugacity at high pressures. We predict a sequential nitridation of Re at high-pressure/high-temperature conditions. At 3000 K, ReN will form from Re and nitrogen at about 32 GPa. A ReN2 with CoSb2-type structure may be achieved at pressures exceeding 50 GPa at this temperature. Marcasite-type RuN2 will be attainable at 3000 K at pressures above 30 GPa by reacting Ru with nitrogen.

Injection of Liquid Kerosene Into a High-Pressure Subsonic Air Crossflow From Normal Temperature to Elevated Temperature

2012 ◽  
Author(s):  
Lin Li ◽  
Yuzhen Lin ◽  
Xin Xue ◽  
Wei Gao ◽  
Chih-Jen Sung
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
Room Temperature ◽  
Imaging Technique ◽  
Flux Ratio ◽  
Independent Variables ◽  
Air Temperatures ◽  
Jet Penetration ◽  
Temperature Liquid ◽  
Jet Structure

In the present work, injection of liquid kerosene into a high-pressure subsonic air crossflow was investigated experimentally. Tests were conducted at air pressures up to 2.0 MPa and at air temperatures from normal temperature to elevated temperature. Liquid kerosene was injected at room temperature through a 0.5 mm diameter plain orifice. Schlieren imaging technique was used for jet structure visualization, from which the jet penetration trajectory was determined by the image processing. For the conditions tested, a correlation of jet penetration trajectory was developed, with momentum flux ratio, Weber number and crossflow temperature ratio as independent variables. Upper surface trajectories of kerosene spray under different test conditions were compared. Experimental and analytical results showed that the penetration trajectory of liquid kerosene under higher air temperature was greater than that under normal temperature, while momentum ratios were the same.

General Considerations

2021 ◽  
pp. 11-15
Author(s):  
Charles Becht
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
High Purity ◽  
Normal Category ◽  
Piping Systems ◽  
Lower Hazard

The Code includes six categories of fluid service, which provides a means of discriminating among possible degrees of hazard. Less stringent design, examination, and testing are permitted for fluid service of lower hazard (Category D) and more stringent requirements are applied for more hazardous fluid service (Normal, Category M, Elevated Temperature and High Pressure). High Purity fluid service provides requirements needed for piping systems requiring a certain level of cleanness.

scholarly journals CO 2 separation with carbon membranes in high pressure and elevated temperature applications

2018 ◽  
Vol 190 ◽  
pp. 177-189 ◽  
Author(s):  
Shamim Haider ◽  
Arne Lindbråthen ◽  
Jon Arvid Lie ◽  
Ingerid Caroline Tvenning Andersen ◽  
May-Britt Hägg
Keyword(s):  
High Pressure ◽  
Elevated Temperature ◽  
Carbon Membranes ◽  
Temperature Applications
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