Exercise III: circular energy transition

The planned energy transition in the Netherlands means that most buildings have to undergo an expensive renovation to meet new standards. To reduce costs, one can adopt a circular approach to both components or materials released from existing buildings and the new components and subsystems that will be added to the buildings. Organize the following tasks for a typical Dutch single-family house:

  • Document the existing situation in a model appropriate for renovation, i.e. including realization phases, distinction between existing and planned, what should remain and what should be removed
  • Identify in the model components and materials that should be extracted (e.g. radiators: the house will have underfloor heating), explaining how identification takes place (preferably automatically) in the model
  • Estimate the expected circularity form for these components and materials (recycle, remanufacture, repurpose, re-use etc.), explaining which factors play a role (weathering, wear, interfacing with other elements etc.) and how these factors can be detected in the model
  • Identify which elements should be upgraded and specify what this entails in the model (paying attention to phasing and element type changes)
  • Specify how new elements (for the renovation) should be added to the model to support the above in the remaining lifecycle of the house
  • Make a time schedule for the renovation in 4D BIM


  1. Process and information diagrams, accompanied by short explanatory comments
  2. Incomplete model in a BIM editor containing demonstrations of your solutions
  3. Schedules for circularity analyses in BIM
  4. Short overview and table of contents (two A4 sheets)


If the exercise is a group assignment, consider roles for the following aspects:

  • Process management
  • Information management
  • BIM modelling
  • Analyses in BIM (using schedules – probably more than one group member)
  • Legal and technical aspects of the energy transition
  • Building documentation (emphasis on how to deal with incompleteness and uncertainty)
  • Subsystem integration
  • Circularity in design (technical aspects)


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