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Technical Brief

Energy- and Exergy-Based Analysis for Reducing Energy Demand in Heat Processes for Aluminum Casting

[+] Author and Article Information
Manuela Neri

Department of Industrial and Mechanical Engineering,
University of Brescia,
Brescia 25121, Italy
e-mail: manuela.neri@unibs.it

Adriano M. Lezzi

Department of Industrial and Mechanical Engineering,
University of Brescia,
Brescia 25121, Italy
e-mail: adriano.lezzi@unibs.it

Gian P. Beretta

Department of Industrial and Mechanical Engineering,
University of Brescia,
Brescia 25121, Italy
e-mail: gianpaolo.beretta@unibs.it

Mariagrazia Pilotelli

Department of Industrial and Mechanical Engineering,
University of Brescia,
Brescia 25121, Italy
e-mail: mariagrazia.pilotelli@unibs.it

Contributed by the Advanced Energy Systems Division of ASME for publication in the Journal of Energy Resources Technology. Manuscript received November 9, 2018; final manuscript received April 1, 2019; published online April 17, 2019. Assoc. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 141(10), 104501 (Apr 17, 2019) (10 pages) Paper No: JERT-18-1829; doi: 10.1115/1.4043389 History: Received November 09, 2018; Accepted April 02, 2019

In this paper, energy- and exergy-based analysis is used to analyze a factory with high energy demand for the production of aluminum discs. The analysis is focused on heat processes that take place in a melting furnace, a casting machine, a heat treatment oven, and a drying oven. Energy and exergy efficiencies are computed to assess the room for the improvement of the energy efficiency processes. The analysis shows that a large amount of energy is lost due to heat losses to the environment, and solutions for reducing energy demand and emissions have been identified. Instead of changing the equipment of a factory, significant improvements and consequent reduction of fossil fuels consumption can be obtained by increasing the thermal insulation of some components and by means of waste heat recovery performed by heat exchangers, with a consequent energy demand reduction of 15%.

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References

EN 16247-1, 2012, “Energy Audits—Part 1: General Requirements.”
EN 16247-2, 2014, “Energy Audits—Part 2: Buildings.”
EN 16247-3, 2014, “Energy Audits—Part 3: Processes.”
EN 16247-4, 2014, “Energy Audits—Part 4: Transport.”
EN ISO 50001, 2011, “Energy Management Systems—Requirements With Guidance for Use.”
Gyftopoulos, E. P., and Beretta, G. P., 2005, Thermodynamics. Foundations and Applications, Dover, Mineola, NY.
Beretta, G. P., 2004, “Steepest Entropy Ascent Model for Far-Non-Equilibrium Thermodynamics. Unified Implementation of the Maximum Entropy Production Principle,” Phys. Rev., E90, p. 042113.
Duflou, J. R., Sutherland, J. W., Dornfeld, D., Herrmann, C., Jeswiet, J., Kara, S., Hauschild, M., and Kellens, K., 2012, “Towards Energy and Resource Efficient Manufacturing: A Processes and Systems Approach,” CIRP Ann., 61, pp. 587–609. [CrossRef]
Gaggioli, R. A., 1983, Efficiency and Costing, American Chemical Society, Washington, DC, pp. 3–13.
Hepbasli, A., and Akdemir, O., 2004, “Energy and Exergy Analysis of a Ground Source (Geothermal) Heat Pump System,” Energy Convers. Manage., 45, pp. 737–753. [CrossRef]
Hepbasli, A., 2008, “A Key Review on Exergetic Analysis and Assessment of Renewable Energy Resources for a Sustainable Future,” Renew. Sustain. Energy Rev., 12, pp. 593–661. [CrossRef]
Petela, R., 2003, “Exergy of Undiluted Thermal Radiation,” Solar Energy, 74, pp. 469–488. [CrossRef]
Pons, M., 2012, “Exergy Analysis of Solar Collectors, From Incident Radiation to Dissipation,” Renew. Energy, 47, pp. 194–202. [CrossRef]
Neri, M., Luscietti, D., and Pilotelli, M., 2017, “Computing the Exergy of Solar Radiation From Real Radiation Data,” J. Energy Resour. Technol., 139, pp. 0612011–0612017. [CrossRef]
Jian, Q., and Luo, L., 2018, “The Improvement on Efficiency and Drying Performance of a Domestic Venting Tumble Clothes Dryer by Using a Heat Pipe Heat Recovery Heat Exchanger,” Appl. Therm. Eng., 136, pp. 560–567. [CrossRef]
Unal, C., and Murat, T., 2003, “Exergy Analysis and Efficiency in an Industrial AC Electric ARC Furnace,” Appl. Therm. Eng., 23, pp. 2255–2267. [CrossRef]
Rosen, M. A., and Lee, D. L., “Exergy-Based Analysis and Efficiency Evaluation for an Aluminum Melting Furnace in a Die-Casting Plant,” IASME/WSEAS International Conference on Energy and Environment, Cambridge, UK, Feb. 24–26, 2009.
Lee, D., 2003, “Exergy Analysis and Efficiency Evaluation for an Aluminum Melting Furnace in a Die Casting Plant,” thesis and dissertation, Ryerson University, Toronto.
Martinez-Patiño, J., Serra, L., Verda, V., Picón-Núñez, M., and Rubio-Maya, C., 2016, “Thermodynamic Analysis of Simultaneous Heat and Mass Transfer Systems,” J. Energy Resour. Technol., 138, p. 062006. [CrossRef]
Caglayan, H., and Caliskan, H., 2018, “Energy, Exergy and Sustainability Assessment of a Cogeneration System for Ceramic Industry,” Appl. Therm. Eng., 136, pp. 504–515. [CrossRef]
Mehdizadeh-Fard, M., Pourfayaz, F., Mehrpooya, M., and Kasaeian, A., 2018, “Improving Energy Efficiency in a Complex Natural Gas Refinery Using Combined Pinch and Advanced Exergy Analyses,” Appl. Therm. Eng., 137, pp. 341–355. [CrossRef]
Kanoglu, M., and Dincer, I., 2009, “Performance Assessment of Cogeneration Plants,” Energy Convers. Manage., 50, pp. 76–81. [CrossRef]
Rosen, A., 1998, “Reductions in Energy Use and Environmental Emissions Achievable With Utility-Based Cogeneration: Simplified Illustrations for Ontario,” Appl. Energy, 61, pp. 163–174. [CrossRef]
Mokheimer, E. M. A., and Dabwan, Y. N., 2018, “Performance Analysis of Integrated Solar Tower With a Conventional Heat and Power Co-Generation Plant,” J. Energy Resour. Technol., 141, p. 021201. [CrossRef]
Yoshitsugu, H., Takeyoshi, K. H., Suzuoki, Y., and Kaya, Y., 1999, “Minimizing Energy Consumption in Industries by Cascade Use of Waste Energy,” IEEE Trans. Energy Convers., 14, pp. 795–801. [CrossRef]
Valero, A., Serra, L., and Uche, J., 2005, “Fundamentals of Exergy Cost Accounting and Thermoeconomics Part II: Applications,” J. Energy Resour. Technol., 128, pp. 9–15. [CrossRef]
Wong, K., 2015, “Sustainable Engineering in the Global Energy Sector,” ASME J. Energy Resour. Technol., 138, pp. 02470.
Torres, V. A., Lerch, C., Royo, F., and Serra, L., 2002, “Structural Theory and Thermoeconomic Diagnosis. Part I: On Malfunction and Dysfunction Analysis,” Energy Convers. Manage., 43, pp. 1518–1535. [CrossRef]
Szega, M., and Żymełka, P., 2017, “Thermodynamic and Economic Analysis of the Production of Electricity, Heat, and Cold in the Combined Heat and Power Unit With the Absorption Chillers,” J. Energy Resour. Technol., 140, pp. 052002. [CrossRef]
Kanoglu, M., Dincer, I., and Rosen, M. A., 2007, “Understanding Energy and Exergy Efficiencies for Improved Energy Management in Power Plants,” Energy Policy, 35, pp. 3967–3978. [CrossRef]
Cornellissen, R. L., 1997, “Thermodynamics and Sustainable Development: The Use of Exergy Analysis and the Reduction of Irreversibility,” Ph.D. thesis, University of Twente, Enschede.
Szargut, J., Morris, D. R., and Steward, F. R., 1987, Exergy Analysis of Thermal, Chemical, and Metallurgical Processes, Hemisphere Publishing, New York.
Rosen, M. A., 2009, “Indicators for the Environmental Impact of Waste Emissions: Comparison of Exergy and Other Indicators,” Trans. Can. Soc. Mech. Eng., 33, pp. 145–159. [CrossRef]
Rosen, M. A., and Dincer, I., 1997, “On Exergy and Environmental Impact,” Int. J. Energy Res., 21, pp. 575–681. [CrossRef]
Dincer, I., and Rosen, M. A., 2012, Exergy: Energy, Environment and Sustainable Development, Elsevier, Oxford.
Beretta, G. P., Iora, P., and Ghoniem, A. F., 2012, “Novel Approach for Fair Allocation of Primary Energy Consumption Among Cogenerated Energy-Intensive Products Based on the Actual Local Area Production Scenario,” Energy, 44, pp. 1107–1120. [CrossRef]
ISO 10211: 2017, “Thermal Bridges in Building Construction—Heat Flows and Surface Temperatures—Detailed Calculations.”
Incropera, F. P., and De Witt, P. D., 1985, Fundamentals of Heat and Mass Transfer, John Wiley and Sons, Hoboken, NJ.

Figures

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Fig. 1

Illustration of the factory: according to Ref. [8], the rectangles represent the facilities or areas, and for each of them one or more utilities are shown

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Fig. 2

Factory energy consumption

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Fig. 3

Illustration of the utilities analyzed: (a) melting furnace, (b) casting machine, (c) heat treatment oven, and (d) drying oven

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Fig. 4

Energy consumption distribution for the melting furnace

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Fig. 5

The oven of the casting machine: (a) scheme of the oven where dimensions are in centimeters and (b) temperatures measured on the oven surface

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Fig. 6

Energy use distribution for the casting machine oven in the current configuration and in the new configuration with an additional insulating layer

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Fig. 7

Details of the heat treatment oven: (a), (b), and (c) layers of the heat treatment oven wall in the current configuration; (d), (e), and (f) new configuration with the additional insulating layer

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Fig. 8

Comparison between the energy use in the actual configuration and with an additional layer of insulating material for the heat treatment oven

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Fig. 9

Comparison between the energy use in the actual configuration and with heat recovery for the drying oven in the painting department

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Fig. 10

Comparison between consumption of current and modified configurations

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