Syntactic Foam Thermal Insulation for Ultradeep High Temperature Applications

2002 ◽  
Author(s):  
Wen-Tsuen Wang ◽  
Lou Watkins
Keyword(s):  
High Temperature ◽  
Laboratory Test ◽  
Continuous Flow ◽  
Oil And Gas ◽  
Syntactic Foam ◽  
New Materials ◽  
The Past ◽  
Long Term Performance ◽  
Term Performance

This paper addresses a major challenge facing deepwater production of oil and gas: how to assure continuous flow of product under the pressures and temperatures found on the ocean floor. Syntactic foam promises to overcome the limitations exhibited by conventional insulation materials in the past. New hybrid glass and polymer chemistries with improved “hot, wet” performance survive in conditions that were formerly thought impossible. This paper presents the latest laboratory test data on these new materials, and proposes models for predicting long-term performance.

A High Temperature and UV Stable Vapor Phase Polymer for Electronics Applications

2011 ◽  
Vol 2011 (HITEN) ◽  
pp. 000207-000214
Author(s):  
Rakesh Kumar
Keyword(s):  
High Temperature ◽  
Electronic Devices ◽  
Electronics Industry ◽  
Performance Requirements ◽  
Cell Components ◽  
Temperature Exposure ◽  
Electronic Parts ◽  
Long Term Performance ◽  
Term Performance

A recent development in the area of high temperature and UV stable polymers, which offers solutions to many existing packaging and reliability challenges of electronics industry, is described. Packaging, protection and reliability of various electronic devices and component, including PCB's, MEMS, optoelectronic devices, fuel cell components and nano-electronic parts are, becoming more challenging due to their long-term performance requirements. This high temperature polymer, named Parylene HT, offers solutions to many existing protective, packaging and reliability issues in the electronics and medical industries, in part because of its excellent electrical and mechanical properties, chemical inertness and long-term thermal stability at high temperature exposure (up to 350°C long-term and short-term at 450 °C). Experimental results and trial runs demonstrate the ability of Parylene HT coating to meet the growing requirements of higher dielectric capabilities, higher temperature integrity, mechanical processing, etc. of a dynamic electronics industry. In addition, Parylene HT polymer coating truly conforms to parts due to its molecular level deposition characteristics. Its suitability and biocompatibility encourage researchers to explore Parylene HT's role in sensors and in active electronic devices for various industries.

Metallurgy and Behavior of Alloys for Reformer Furnaces

2007 ◽  
Author(s):  
Carl E. Jaske
Keyword(s):  
High Temperature ◽  
Material Properties ◽  
Material Behavior ◽  
High Temperature Creep ◽  
Centrifugally Cast ◽  
Resistance To Oxidation ◽  
Long Term Performance ◽  
And Behavior ◽  
Term Performance

This paper reviews the metallurgy and behavior of centrifugally cast heat-resistant alloys for ammonia, methanol, and hydrogen reformer furnaces. The alloys include HK and HP, as well as proprietary versions of these materials produced by various foundries. Alloying and metallurgical factors that affect resistance to oxidation, carburization, and high temperature creep are discussed. Examples of the effects of environment and temperature on material behavior are provided. Finally, the use of material properties to predict the long-term performance of reformer furnace components is reviewed.

scholarly journals Fragmentation, Centralisation and Policy Learning: An Example from China's Wind Industry

2014 ◽  
Vol 43 (3) ◽  
pp. 175-205 ◽  
Author(s):  
Marius Korsnes
Keyword(s):  
Rapid Growth ◽  
High Speed ◽  
Policy Learning ◽  
Institutional Conditions ◽  
The Past ◽  
Policy Experimentation ◽  
Governing System ◽  
Long Term Performance ◽  
Term Performance

This paper seeks to understand what government mechanisms have allowed China's wind industry to grow as fast as it has over the past ten years. Instead of formal rules and regulations, this paper focuses on specific sets of institutional conditions that have been crucial in the process of high-speed implementation of wind energy in China. Specifically, fragmentation and centralisation, together with policy experimentation and policy learning, have been fundamental for policy flexibility and institutional adaptability. The paper illustrates that there are benefits and disadvantages to these characteristics, and that inherent qualities of China's governing system that lead to rapid growth overlap with those that lead to challenges in terms of quality and long-term performance.

Thermodynamic Modeling of Cement/Groundwater Interaction as a Tool For Long-Tern Performance Assessment

1989 ◽  
Vol 176 ◽  
Author(s):  
Louise J. Criscenti ◽  
R. Jeff Serne
Keyword(s):  
Radioactive Waste ◽  
Performance Assessment ◽  
Natural Environment ◽  
Chemical Behavior ◽  
Geochemical Model ◽  
The Past ◽  
Long Term Performance ◽  
Term Performance ◽  
Low Level Radioactive Waste

ABSTRACTThe chemical behavior of cement in the natural environment is of interest because cement has been suggested as a means of containing low-level radioactive waste and as a barrier between radioactive-waste containers and the surrounding soil or rock. In the past, either experiments or computer modeling have been used independently to predict how cement will leach in the natural environment. In this study, a geochemical model for cement leaching was developed, and predictions by the model were compared to results from a static leach test. Calcium concentrations and pH were adequately predicted by the model; however, other major leachate constituents, such as Al, Si, and S04, were poorly predicted. Additional experimental data and refinement of the model are both required to better predict the observed leachate concentrations. Accurate prediction of experimental results by a geochemical model would increase confidence in the model for use in long-term performance assessment.

Improved Long Term Performance Stability of Sr-Fe-O Infiltrated LSM/YSZ Solid Oxide Fuel Cells under High Steam and High Temperature

2018 ◽  
Vol 85 (13) ◽  
pp. 1277-1287 ◽  
Author(s):  
Yueying Fan ◽  
Yun Chen ◽  
Harry Abernathy ◽  
Richard Pineault ◽  
Xueyan Song ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Long Term Performance ◽  
Term Performance

scholarly journals Development of mRNA Vaccines: Scientific and Regulatory Issues

Vaccines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 81
Author(s):  
Ivana Knezevic ◽  
Margaret A. Liu ◽  
Keith Peden ◽  
Tiequn Zhou ◽  
Hye-Na Kang
Keyword(s):  
Vaccine Development ◽  
Rapid Development ◽  
Current Status ◽  
Safety And Efficacy ◽  
The Past ◽  
Core Function ◽  
International Convergence ◽  
Long Term Performance ◽  
Term Performance

The global research and development of mRNA vaccines have been prodigious over the past decade, and the work in this field has been stimulated by the urgent need for rapid development of vaccines in response to an emergent disease such as the current COVID-19 pandemic. Nevertheless, there remain gaps in our understanding of the mechanism of action of mRNA vaccines, as well as their long-term performance in areas such as safety and efficacy. This paper reviews the technologies and processes used for developing mRNA prophylactic vaccines, the current status of vaccine development, and discusses the immune responses induced by mRNA vaccines. It also discusses important issues with regard to the evaluation of mRNA vaccines from regulatory perspectives. Setting global norms and standards for biologicals including vaccines to assure their quality, safety and efficacy has been a WHO mandate and a core function for more than 70 years. New initiatives are ongoing at WHO to arrive at a broad consensus to formulate international guidance on the manufacture and quality control, as well as nonclinical and clinical evaluation of mRNA vaccines, which is deemed necessary to facilitate international convergence of manufacturing and regulatory practices and provide support to National Regulatory Authorities in WHO member states.

Materials Research in Nuclear Waste Management: Reflections on Twenty-Five MRS Symposia

2002 ◽  
Vol 713 ◽  
Author(s):  
Rodney C. Ewing
Keyword(s):  
Waste Management ◽  
Nuclear Waste ◽  
Scientific Basis ◽  
Nuclear Waste Management ◽  
The Past ◽  
Materials Research ◽  
Long Term Performance ◽  
Term Performance ◽  
Selection Of

ABSTRACTThe MRS symposium, “Scientific Basis for Nuclear Waste Management” was first held in Boston, November 28th to December 1st, 1978. This symposium marks the twenty-fifth in a series that now rotate to meeting sites around the world. During the past 24 years, there has been considerable progress in the development and understanding of the behavior of materials that are used in the processing, transport, containment and disposal of radioactive waste. The design and selection of materials for long-term performance has required a uniquely interdisciplinary effort. Over the same period, there have been important developments in the regulatory framework that guides the scientific and engineering needs of nuclear waste management. This paper provides a subjective commentary on the major developments and innovations during the past 25 symposia. The future challenge will be the proper and constructive integration of the science into the development of nuclear waste disposal strategies.

Sign in / Sign up

Export Citation Format

Share Document