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Best Practice

Energy simulation assisted district planning

Helsinki sub-region, Espoo, Finland (2022)
Scale: District level
3D city models contain a lot of data about buildings. This information may be used to carry out building and block energy simulation and assess different improvement scenarios for achieving energy positiveness of city blocks. Visualization of results using concise indicators saves planners’ time.

Affordable And Clean Energy

Sustainable Cities And Communities

Challenge / Goal

Identifying suitable technologies supporting improved district energy planning. There exist various solutions to improve the energy efficiency and self-sufficiency of districts. These increasingly include integration of local energy sources at individual buildings, or massive implementation of energy efficiency measures e.g., certain products, or in cases with large housing companies even renovation packages in groups of buildings. Changes in energy use and balances of individual buildings and districts may be notable and require assessment. Also relative sizes, consumption intensity and distances matter.

  • What degree of self-sufficiency may be achieved with certain solution packages?
  • Are there solar energy surpluses within the area?
  • Which buildings or building groups to prioritize?
  • How much peak load may be decreased if indoor temperature set point is lowered by 1 degree?

Answering these types of questions requires work-intensive modelling and collection of various data.

Solution

Use existing 3D city models to collect up-to-date basic information about buildings in the district and to construct simplified energy models of individual buildings automatically.

Calculate the effect of improvement measures:

  • Define sets of measures by building groups
  • Simulate resulting hourly energy load and generation profiles for individual buildings

Summarize and display results:

  • Absolute and relative summaries for individual buildings (table, map-based visualization)
  • Performance indicators for the district (table)

Images


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Time period

Planning time: Less than 6 months

Implementation time: 6 months to 1 year

Implementers

VTT and City of Espoo

Service providers

Not decided

End users

Nobody is using the system at the moment, but it's intented for block planners in the city organisation or in consult companies

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