# 4.4: Exercise III- circular energy transition

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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

## Deliverables

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

## Roles

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)

This page titled 4.4: Exercise III- circular energy transition is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Alexander Koutamanis (TU Delft Open Textbooks) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.