Articles Open Access 2026-10-12

What Transformer Early-Replacement Models Teach Us: Functional and Communicative Design Principles for Impact-Assessment Tools

Jana Hack , Robin Barkhausen

Abstract

Transformers play a key role in the European energy transition by reducing network losses and enabling the integration of renewable electricity. Early replacement of inefficient transformers can contribute significantly to energy savings, but its net impact depends on local conditions and needs to be quantified with suitable decision-support tools. This paper reviews seven existing tools that address transformers or closely related products, assessing them with a combined framework covering general characteristics (target group, granularity, scope, implementation), functional design (task-fit, user-fit, context-fit) and multimodal understanding (localisation, orientation, hierarchisation, navigation, framing, sequencing).

The analysis reveals two main user groups—industry stakeholders and policymakers—and shows that there is no transformer-specific tool to estimate the impacts of early replacement policies at EU stock level. Good practices include the use of IEC and Ecodesign standards, dynamic and context-specific data, minimal mandatory inputs, layered complexity and clear visual framing (e.g. consistent shading of input cells and error highlighting). Common pitfalls include limited methodological transparency, over-aggregated outputs and multimodal weaknesses such as inconsistent colour schemes, poorly labelled graphs and unclear sequencing.

Based on these findings, we identify a gap in the tool landscape, the absence of a transformer-specific tool to estimate impacts of early replacement policies at EU stock level and derive general recommendations for user-centred tool development. These include anchoring calculations in recognised standards, combining layered inputs with scenario comparison, and embedding multimodal design principles from the outset. The study demonstrates how functional and multimodal perspectives can jointly guide the assessment and development of more robust decision support tools.

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Published 2026-10-12
Issue Vol. 1 No. 1 (2026): Issue 1
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References

  1. ABB Customer support. 2026. E-Mail Robin Barkhausen, 27 February.
  2. Search in Google Scholar
  3. Back to article
  4. ABB Transformers. 2016. A Quick Guide: Total Cost of Ownership calculator (ver. 2.0) [Online]. Available at: https://de.scribd.com/document/335951706/A-Quick-Guide-TCO-Tool-2-0.
  5. Search in Google Scholar
  6. Back to article
  7. Bucher, H-J. 2010. ‘Multimodalität–eine Universalie des Medienwandels: Problemstellungen und Theorien der Multimodalitätsforschung’. In: Bucher, H-J, Gloning, T and Lehnen, K (eds.) Neue Medien – neue Formate [Online]. Campus Verlag. Available at: https://library.oapen.org/handle/20.500.12657/86537.
  8. Search in Google Scholar
  9. Back to article
  10. Bucher, H-J. 2025. ‘Insights into the black box of multimodal meaning-making: investigating the reception of multimodality empirically’. Visual Communication, 24(3): 543–569. DOI: 10.1177/14703572251335833
  11. Search in Google Scholar
  12. Back to article
  13. CLASP. 2026. Mepsy: The Appliance & Equipment Climate Impact Calculator (1.15.2) [Computer program]. Available at: https://clasp.shinyapps.io/mepsy (Accessed 5 March 2026).
  14. Search in Google Scholar
  15. Back to article
  16. EU-MORE. 2024. EU-MORE Motor Model (1.4) [Computer program]. Available at: https://eu-more.eu/2276-2/.
  17. Search in Google Scholar
  18. Back to article
  19. European Commission. 2024. Energy Efficient Products: Power Transformers [Online]. Available at: https://energy-efficient-products.ec.europa.eu/product-list/power-transformers_en (Accessed 11 February 2026).
  20. Search in Google Scholar
  21. Back to article
  22. Galimshina, A, McCarty, J, Abu-Ghaida, H, Waibel, C, Schlueter, A and Hollberg, A. 2025. ‘Replace or retain? Timing PV panel replacement for maximum life cycle carbon savings’. IOP Conference Series: Earth and Environmental Science, 1554(1): 12119 [Online]. DOI: 10.1088/1755-1315/1554/1/012119
  23. Search in Google Scholar
  24. Back to article
  25. Gertsman, E and Kyllo, P. (eds.) 2012. The Challenge of AC Early Replacement [Online]. Available at: https://www.aceee.org/files/proceedings/2012/data/papers/0193-000045.pdf.
  26. Search in Google Scholar
  27. Back to article
  28. Gluckman, PD, Bardsley, A and Kaiser, M. 2021. ‘Brokerage at the science–policy interface: from conceptual framework to practical guidance’. Humanities and Social Sciences Communications, 8(1): 84 [Online]. DOI: 10.1057/s41599-021-00756-3
  29. Search in Google Scholar
  30. Back to article
  31. Green Transfo. 2025. Total Cost of Ownership Calculator [Online]. Available at: https://green-transfo.com/total-cost-of-ownership/ (Accessed 6 March 2026).
  32. Search in Google Scholar
  33. Back to article
  34. Liu, L, Keoleian, GA and Saitou, K. 2017. ‘Replacement policy of residential lighting optimized for cost, energy, and greenhouse gas emissions’. Environmental Research Letters, 12(11): 114034 [Online]. DOI: 10.1088/1748-9326/aa9447
  35. Search in Google Scholar
  36. Back to article
  37. OECD. 2026. Evaluation Criteria [Online]. Available at: https://www.oecd.org/en/topics/sub-issues/development-co-operation-evaluation-and-effectiveness/evaluation-criteria.html (Accessed 11 February 2026).
  38. Search in Google Scholar
  39. Back to article
  40. U4E (United for Efficiency). 2021. U4E Total Cost of Ownership Calculation Spreadsheet (1.1) [Computer program]. Available at: https://united4efficiency.org/wp-content/uploads/2022/01/UNEP-U4E_TCOCalculator_v1.1.xlsx.
  41. Search in Google Scholar
  42. Back to article
  43. UNEP U4E. 2025. UNEP Calculator – Copenhagen Centre on Energy Efficiency [Online]. Available at: https://toolbox.unepccc.org/transformer (Accessed 5 March 2026).
  44. Search in Google Scholar
  45. Back to article
  46. Wierda, L and Zanuttini, A. 2024. Ecodesign Impact Accounting: Overview Report 2024 [Online]. Available at: https://circabc.europa.eu/ui/group/418195ae-4919-45fa-a959-3b695c9aab28/library/e2a752ef-c365-41df-8e50-98376e6ca756/details.
  47. Search in Google Scholar
  48. Back to article

Authors

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Jana Hack

R

Robin Barkhausen

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Vol. 1 No. 1 (2026): Issue 1

Issue 1

Published: 2026-10-31

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