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Primary Aluminum Productiona Offgas Waste Heat Estimate: 2,734,062 tons/year CO2 emissions per unit aluminumb CO2 Enthalpy at 1,292oF 1.22 tons CO2/ton aluminum 312 Btu/lb CO2 77oF Reference 300oF Reference Off-gas waste heat lossc 264 Btu/lb CO 2 77oF Reference 300oF Reference 2.6 TBtu/year 2.2 TBtu/year Table A2.15 - Estimate of Primary Aluminum Cell Waste Heat Primary Aluminum Melting Off-gas and Sidewall Waste Heat Estimate Sidewall Waste Heat Estimate: Energy Consumptiond Percent Sidewall Lossese 45% 61 TBtu/year Carnot 69% Sidewall Losses Work Potential a. Patricia A Plunkert, 2007. USGS Mineral Commodity Summaries 2007. Year 2006 estimate b. BCS, 2003., US Requirements for Aluminum Production: Historical Perspective, Theoretical Limits and New Opportunities, Table E-4 c. Calculated from aluminum production, CO2 emissions rate, and CO2 enthalpy d. Based on estimates in Table A 13 e. Burkin, A.R. 1987, Production of Alumina and Aluminum Chichester: John Wiley & Sons. p. 63. 42 TBtu/year A-18 134.6 TBtu/yearPDF Image | Waste Heat to Energy Tech Opportunities in US Industry
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