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Optimizing Lifespan of Circular Products: A Generic Dynamic Programming Approach for Energy-Using Products

Author

Listed:
  • Torsten Hummen

    (Bosch Thermotechnology GmbH, Junkersstraße 20, 73249 Wernau (Neckar), Germany
    Institute of Environmental Engineering, ETH Zurich, 8093 Zurich, Switzerland
    Current address: Robert Bosch GmbH, Robert-Bosch-Campus 1, 71272 Renningen, Germany.)

  • Stefanie Hellweg

    (Institute of Environmental Engineering, ETH Zurich, 8093 Zurich, Switzerland)

  • Ramin Roshandel

    (Department of Energy Engineering, Sharif University of Technology, Tehran 1458889694, Iran)

Abstract

Slowing down replacement cycles to reduce resource depletion and prevent waste generation is a promising path toward a circular economy ( CE ). However, an obligation to longevity only sometimes makes sense. It could sometimes even backfire if one focuses exclusively on material resource efficiency measures of the production phase and neglects implications on the use phase. The (environmental) lifespan of circular products should, therefore, be optimized, not maximized, considering all life cycle phases. In this paper, a generic method for determining the optimal environmental lifespan ( OEL ) of energy-using products ( EuPs ) in a CE is developed, allowing the simultaneous inclusion of various replacement options and lifetime extension processes, like re-manufacturing, in the assessment. A dynamic programming approach is used to minimize the cumulative environmental impact or costs over a specific time horizon, which allows considering an unordered sequence of replacement decisions with various sets of products. The method further accounts for technology improvement as well as efficiency degradation due to usage and a dynamic energy supply over the use phase. To illustrate the application, the OEL of gas heating appliances in Germany is calculated considering newly evolved products and re-manufactured products as replacement options. The case-study results show that with an average heat demand of a dwelling in Germany, the OEL is just 7 years for climate change impacts and 11 years for the aggregated environmental indicator, R e C i P e e n d p o i n t ( t o t a l ) . If efficiency degradation during use is considered, the OEL for both environmental impact assessment methods even lowers to 1 year. Products are frequently replaced with re-manufactured products to completely restore efficiency at low investment cost, resulting in higher savings potential. This not only implies that an early replacement before the product breaks down is recommended but also that it is essential to maintain the system and, thus, to prevent potential efficiency degradation. The results for cost optimization, as well as currently observed lifespans, vary considerably from this.

Suggested Citation

  • Torsten Hummen & Stefanie Hellweg & Ramin Roshandel, 2023. "Optimizing Lifespan of Circular Products: A Generic Dynamic Programming Approach for Energy-Using Products," Energies, MDPI, vol. 16(18), pages 1-27, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6711-:d:1243420
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    References listed on IDEAS

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    1. Tim Cooper, 2005. "Slower Consumption Reflections on Product Life Spans and the “Throwaway Society”," Journal of Industrial Ecology, Yale University, vol. 9(1‐2), pages 51-67, January.
    2. Esther Thiébaud (†Müller) & Lorenz M. Hilty & Mathias Schluep & Rolf Widmer & Martin Faulstich, 2018. "Service Lifetime, Storage Time, and Disposal Pathways of Electronic Equipment: A Swiss Case Study," Journal of Industrial Ecology, Yale University, vol. 22(1), pages 196-208, February.
    3. Rechberger, H. & Graedel, T. E., 2002. "The contemporary European copper cycle: statistical entropy analysis," Ecological Economics, Elsevier, vol. 42(1-2), pages 59-72, August.
    4. Graedel, T. E., 2002. "The contemporary European copper cycle: introduction," Ecological Economics, Elsevier, vol. 42(1-2), pages 5-7, August.
    5. Allwood, Julian M. & Ashby, Michael F. & Gutowski, Timothy G. & Worrell, Ernst, 2011. "Material efficiency: A white paper," Resources, Conservation & Recycling, Elsevier, vol. 55(3), pages 362-381.
    6. Graedel, T. E. & Bertram, M. & Fuse, K. & Gordon, R. B. & Lifset, R. & Rechberger, H. & Spatari, S., 2002. "The contemporary European copper cycle: The characterization of technological copper cycles," Ecological Economics, Elsevier, vol. 42(1-2), pages 9-26, August.
    7. De Kleine, Robert D. & Keoleian, Gregory A. & Kelly, Jarod C., 2011. "Optimal replacement of residential air conditioning equipment to minimize energy, greenhouse gas emissions, and consumer cost in the US," Energy Policy, Elsevier, vol. 39(6), pages 3144-3153, June.
    8. Marcel C. Hollander & Conny A. Bakker & Erik Jan Hultink, 2017. "Product Design in a Circular Economy: Development of a Typology of Key Concepts and Terms," Journal of Industrial Ecology, Yale University, vol. 21(3), pages 517-525, June.
    9. Truttmann, Nina & Rechberger, Helmut, 2006. "Contribution to resource conservation by reuse of electrical and electronic household appliances," Resources, Conservation & Recycling, Elsevier, vol. 48(3), pages 249-262.
    10. Kim, Hyung Chul & Keoleian, Gregory A. & Horie, Yuhta A., 2006. "Optimal household refrigerator replacement policy for life cycle energy, greenhouse gas emissions, and cost," Energy Policy, Elsevier, vol. 34(15), pages 2310-2323, October.
    11. Zhang, Xiaojin & Bauer, Christian & Mutel, Christopher L. & Volkart, Kathrin, 2017. "Life Cycle Assessment of Power-to-Gas: Approaches, system variations and their environmental implications," Applied Energy, Elsevier, vol. 190(C), pages 326-338.
    12. Bertram, M. & Graedel, T. E. & Rechberger, H. & Spatari, S., 2002. "The contemporary European copper cycle: waste management subsystem," Ecological Economics, Elsevier, vol. 42(1-2), pages 43-57, August.
    13. Spatari, S. & Bertram, M. & Fuse, K. & Graedel, T. E. & Rechberger, H., 2002. "The contemporary European copper cycle: 1 year stocks and flows," Ecological Economics, Elsevier, vol. 42(1-2), pages 27-42, August.
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