Analysis for Recovering Energy from Industrial Waste Heat

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Analysis for Recovering Energy from Industrial Waste Heat ( analysis-recovering-energy-from-industrial-waste-heat )

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4 SUMMARY Waste Heat Recovery Opportunities – from Energetics [34] Item # 1 4 10 18 19 Description of Opportunity Heat recovery from drying processes (chemicals, forest products, food processing) Area Waste heat recovery from gases and liquids in chemicals, petroleum, and forest products, including hot gas cleanup and dehydration of liquid waste streams Waste heat recovery from gases in metals and non-metallic minerals manufacture (excluding calcining), including hot gas cleanup Waste heat recovery from calcining (not flue gases) Heat recovery from metal quenching/cooling processes Total Estimated Energy Available (TBtu) ~7,000 (7400 PJ) ~3700 (3900 PJ) ~1600 (1700 PJ) >10,000 (10,500 PJ) Estimated Recovery Efficiency ~12% ~10% ~15% Estimated Recovery Opportunity (TBtu) 851 ( 898 PJ) 377 (400 PJ) 235 (250 PJ) 74 (78 PJ) 57 (60 PJ) 1594 (1680 PJ) Economic Benefit if Realized, $ billion (2005) $2.15B $1.24B $1.23B $0.16B $0.28B $5.06B The pathways to recovering the chemical and thermal emissions include research, development, and demonstration of high-efficiency, low-cost devices to recover chemical and thermal emissions. These pathways also include developing technologies to mitigate waste heat and emissions through better materials and process technologies. See Figure 4 for a consolidated view of the opportunities, barriers, and pathways associated with the chemical and thermal emissions from U.S. industry. This report also discussed advanced materials (e.g., thermoelectric, thermionic, and piezoelectric) that might be employed to help recover thermal emission as well as solid oxide fuel cells and other technologies that appear to be the most promising technology to recover chemical emissions. Additional research and development as well as industry education may be required in order to make these technologies sufficiently cost-effective and widely commercialized. 78

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