Industrial Waste Heat Recovery: Potential

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Industrial Waste Heat Recovery: Potential ( industrial-waste-heat-recovery-potential )

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R&D Opportunities R&D opportunities are presented in three formats: by temperature range, by major industry, and by research category. R&D Opportunities for Various Temperature Ranges The following are lists of R&D opportunities categorized in temperature regimes at which waste heat is available. Opportunities for High-Temperature Waste Heat Sources This section includes two different categories of high temperatures: 1,200°–1,600°F (650°-870°C), and >1,600°F (or 870°C).  Heat recovery systems that can handle high-temperature gases with solids and condensable contaminants. These systems can also have internal cleaning systems that allow long-term continuous operation without major maintenance time for cleaning or rebuilding. The systems can be recuperative or regenerative.  Materials that can withstand high temperatures and chemical reactions with the waste heat source and the cyclic nature of waste heat in terms of mass flow rates, temperature, or composition.  Development of high-temperature phase change materials that can be used by high-temperature heat recovery systems to reduce the size of the system and allow tolerance of the cyclic nature of the waste heat source.  Development and testing of selective coatings or laminations that are compatible with base materials of construction and can withstand specific contaminants and combustibles in the waste gas streams.  Systems with smaller footprints that allow installation as a retrofit for existing systems, which are usually located in limited space in the plants.  Secondary heat recovery systems that can be used as supplementary or secondary recovery systems to enhance the performance of the existing systems. These systems should be compatible with the performance of the primary systems.  A hot gas cleaning system to remove particulates from high-temperature gases.  Electrical power generation systems integrated with high-temperature waste heat sources or existing primary heat recovery systems. The electric power generation system must be able to handle variations in heat sources and the cyclic nature of the waste heat source. In most cases, the system must be able to tolerate some contaminants present in the waste heat source.  Catalysts for reforming fuel gases or liquid fuel vapors for use in endothermic heat recovery units. Opportunities for Medium-Temperature Waste Heat Sources This section includes temperatures from 600°–1,200°F (315°-650°C).  Compact heat exchangers or micro-channel heat exchangers for clean gases that reduce the size or footprint of the heat recovery system.  High-performance heat recovery systems that integrate burners and eliminate the need for hot air piping and space for external heat recovery systems. This may require development and integration of micro-channel heat exchangers. Industrial Waste Heat Recovery Page 35

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