High temperature corrosion of advanced ceramic materials for hot gas filters and heat exchangers. Final report

The recent developments in the energy industry have kindled renewed interest in producing energy more efficiently. This has motivated the development of higher temperature cycles and their associated equipment. In this paper we will discuss several design configurations coupled with the inherent properties of preferred ceramic materials to assess the viability and design reliability of ceramic heat exchangers for next generation high temperature heat exchangers. These analyses have been extended to conceptually compare the traditional shell and tube heat exchanger with shell and plate heat exchangers. These analyses include hydrodynamic, heat transfer, mechanical stress and reliability models applicable to an Intermediate Heat Exchanger (IHX) and Process Coupling Heat Exchangers. It was found that ceramic micro-channel heat exchanger designs proved to have the greatest reliability due to their inherent mechanical properties, minimal thermo-mechanical stresses while improving the performance efficiency in a compact footprint.

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Development of high temperature, corrosion resistant polymer concrete for use in the steam distribution system of the Consolidated Edison Company of New York. Final report

10.2172/10117620 ◽

1994 ◽

Author(s):

R.P. Webster ◽

L.E. Kukacka ◽

W. Reams ◽

C.A. Miller

Keyword(s):

New York ◽

High Temperature ◽

Distribution System ◽

High Temperature Corrosion ◽

Polymer Concrete ◽

Final Report ◽

Corrosion Resistant

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Design and Development of a Low-Cost, High Temperature Silicon Carbide Micro-Channel Recuperator

Volume 1: Turbo Expo 2005 ◽

10.1115/gt2005-69143 ◽

2005 ◽

Cited By ~ 5

Author(s):

Merrill A. Wilson ◽

Kurt Recknagle ◽

Kriston Brooks

Keyword(s):

Heat Transfer ◽

Silicon Carbide ◽

High Temperature ◽

Heat Exchanger ◽

Thermal Efficiency ◽

Heat Exchangers ◽

Ceramic Materials ◽

Micro Channel ◽

Micro Channels ◽

Micro Turbine

Typically, ceramic micro-channel devices are used for high temperature heat exchangers, catalytic reactors, electronics cooling, and processing of corrosive streams where the thermomechanical benefits of ceramic materials are desired. These benefits include: high temperature mechanical and corrosion properties and tailorable material properties such as thermal expansion, electrical conductivity and thermal conductivity. In addition, by utilizing Laminated Object Manufacturing (LOM) methods, inexpensive ceramic materials can be layered, featured and laminated in the green state and co-sintered to form monolithic structures amenable to mass production. In cooperation with the DOE and Pacific Northwest National Labs, silicon carbide (SiC) based micro-channel recuperator concepts are being developed and tested. The performance benefits of a high temperature, micro-channel heat exchanger are realized from the improved thermal efficiency of the high temperature cycles and the improved effectiveness of micro-channels for heat transfer. In designing these structures, the heat and mass transfer within the micro-channels are being analyzed with heat transfer models, computational fluid dynamics models and validated with experimental results. As an example, a typical micro-turbine cycle was modified and modeled to incorporate this ceramic recuperator and it was found that the overall thermal efficiency of the micro-turbine could be improved from about 27% to over 40%. Process improvements require technical advantages and cost advantages. These LOM methodologies have been based on well-proven industry standard processes where labor, throughput and capital estimates have been tested. Following these cost models and validation at the prototype scale, cost estimates were obtained. For the micro-turbine example, cost estimates indicate that the high-temperature SiC recuperator would cost about $200 per kWe. The development of these heat exchangers is multi-faceted and this paper focuses on the design optimization of a layered micro-channel heat exchanger, its performance testing, and fabrication development through LOM methodologies.

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Advanced Ceramic Materials for Use in High-Temperature Particulate Removal Systems

Industrial & Engineering Chemistry Research ◽

10.1021/ie960128i ◽

1996 ◽

Vol 35 (10) ◽

pp. 3384-3398 ◽

Cited By ~ 23

Author(s):

M. A. Alvin

Keyword(s):

High Temperature ◽

Ceramic Materials ◽

Advanced Ceramic ◽

Particulate Removal

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Advanced Ceramics for Environmental Protection

MRS Proceedings ◽

10.1557/proc-344-3 ◽

1994 ◽

Vol 344 ◽

Cited By ~ 1

Author(s):

Jeffrey A. Chambers

Keyword(s):

Silicon Carbide ◽

Thermal Shock ◽

Thermal Shock Resistance ◽

Ceramic Materials ◽

Environmental Applications ◽

Fiber Reinforced ◽

Gas Filtration ◽

Advanced Ceramic ◽

Hot Gas ◽

Shock Resistance

AbstractAdvanced ceramic materials offer significant thermodynamic efficiency advantages over metals and alloys because of their higher use temperatures. Using ceramic components results in higher temperature industrial processes which convert fuels to energy more efficiently, reducing environmental emissions. Ceramics have always offered high temperature strength and superior corrosion and erosion resistance. However, brittleness, poor thermal shock resistance and catastrophic failure have slowed industrial adoptions of ceramics in environmental applications.This paper will focus on environmental applications of three new advanced ceramic materials that are overcoming these barriers to industrial utilization through improved toughness, reliability, and thermal shock performance. PRD-66, a layered oxide ceramic with outstanding thermal shock resistance and high use temperature with utility in catalyst support, insulation, and hot gas filtration applications, is discussed. Tough silicon carbide fiber reinforced silicon carbide (SiC/SiC) and carbon fiber reinforced silicon carbide (C/SiC) ceramic composites made by chemical vapor infiltration, and silicon carbide particulate reinforced alumina (SiCp/A12O3) composites made through Lanxide Corporation's DIMOX™ directed metal oxidation process are described. Applications of these materials to pollution reduction and energy efficiency in medical and municipal waste incineration, heat management, aluminum remelting, pyrolysis, coal combustion and gasification, catalytic pollution control, and hot gas filtration, will be discussed.

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