Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Energy and Environmental Research Emphasizing Low-rank Coal - Task 2.4, Air Toxic Fine Particulate Control
Author: Energy and Environmental Research Emphasizing Low-rank Coal: Task 3.7, Fuel Utilization Properties
Author: Energy and Environmental Research Emphasizing Low-rank Coal: Task 6.2. Joining of Advanced Structural Materials
Author: Energy and Environmental Research Emphasizing Low-rank Coal - Task 3.8, Pressurized Fluidized-bed Combustion
Author: Energy and Environmental Research Emphasizing Low-rank Coal: Task 3.4 - Hot-gas Cleaning. Topical Report (includes Semiannual Report for January-June 1995).
Author: Energy and Environmental Research Emphasizing Low-rank Coal
Author: Energy and Environmental Research Emphasizing Low-rank Coal
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 21
Book Description
In order to increase national energy self-sufficiency for the near future, energy systems will be required to fire low-grade fuels and use more efficient energy cycles than those available today. The steam cycle used at present is limited to a maximum steam temperature of 550°C and thus a conversion efficiency of 35%. To boost efficiency significantly, much higher working fluid temperatures are required, compelling subsystems to operate at much higher temperatures and, therefore, in much more corrosive environments than those currently used. Problems of special concern are corrosion and fatigue of direct-fired turbine blades, corrosion and blinding of hot-gas cleanup filters, catastrophic failure of high-temperature heat exchangers, and spalling and dissolution of refractory materials. The extreme conditions will require the use of advanced structural materials such as high-temperature ceramics for the construction of the subsystems. Unfortunately, little is known of the performance of these materials in actual coal combustion environments. Although some corrosion testing has been performed in the past, most has been done by groups experimenting with ash or slag stimulants composed of only one or two simple compounds. For this project performed at the Energy & Environmental Research Center (EERC), actual coal ash and slag will be used in simulated combustion conditions so that more realistic determinations of the mechanisms of corrosion can be made. The work includes three main research areas focusing on two fossil energy subsystems: high-temperature heat exchangers and hot-gas cleanup filters. The first area involves developing existing abilities in thermodynamic equilibrium calculations to determine the most appropriate corroding agents to include in the tests; the second area involves coal slag corrosion of high temperature heat exchangers; and the third, lower-temperature ash and gas corrosion hot-gas cleanup filters.
Low-rank Coal Study. Volume 5. RD and D Program Evaluation
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A national program is recommended for research, development, and demonstration (RD and D) of improved technologies for the enviromentally acceptable use of low-rank coals. RD and D project recommendations are outlined in all applicable technology areas, including extraction, transportation, preparation, handling and storage, conventional combustion and environmental control technology, fluidized bed combustion, gasification, liquefaction, and pyrolysis. Basic research topics are identified separately, as well as a series of crosscutting research activities addressing environmental, economic, and regulatory issues. The recommended RD and D activities are classified into Priority I and Priority II categories, reflecting their relative urgency and potential impact on the advancement of low-rank coal development. Summaries of ongoing research projects on low-rank coals in the US are presented in an Appendix, and the relationships of these ongoing efforts to the recommended RD and D program are discussed.
Government Reports Announcements & Index
Author: Our Common Future
Author: Publisher:
ISBN: 9780195531916
Category : Australia
Languages : en
Pages : 400
Book Description