Changelogs

IDA Districts 1.0.1 – Changelog

New Components

• CarnotHpChillerIdealFlow
  Substation model for combined heating and cooling operation.
  • Includes two reversible pumps that draw flow either from the supply or return line depending on the operating mode (`hcmode`: heat pump / chiller).
  • The required mass flow is calculated automatically based on the current heating or cooling demand.
  • Performance is derived from the Carnot efficiency combined with a configurable real efficiency.
  • The component maintains the calculated mass flow under ideal flow conditions.
     
• Bi2UniSwitchValve
  Bidirectional-to-unidirectional flow adapter.
  • Converts bidirectional flow into a controlled unidirectional flow.
  • The valve control signal determines the active flow direction and flow path.
     
• HP_A2B
  Air-to-brine heat pump mode
  • Represents a heat pump using ambient air as the heat source and a brine circuit on the secondary side.
     
• pow
  Mathematical signal-processing component.
  • Raises the input signal to a configurable exponent.
  • Can be used for custom control functions and mathematical relationships within the model.
     
• GHX_Many – Borehole Field Model
  Three-dimensional ground heat exchanger model for arbitrary borehole field configurations.
  • Supports any combination of vertical or inclined boreholes with equal borehole length.
  • Based on the superposition of cylindrical 2D temperature fields around each borehole.
  • Includes a 1D vertical ground temperature field representing the undisturbed ground temperature and geothermal gradient.
  • Supports several symmetry options to reduce computational effort.
  • Includes Dirichlet boundary conditions at the top and bottom of the computational domain and an insulated outer boundary.

  • Accounts for ambient temperature, annual mean temperature and deep-ground temperature.

  • The model provides several temperature variables for detailed analysis, including:

    - **TUnDist** – Undisturbed ground temperature including the geothermal effect.
    - **DTref** – Ground temperature variation caused by climatic temperature variations.
    - **DT** – Temperature change caused by an individual borehole.
    - **DTSum** – Combined thermal influence of all surrounding boreholes on a specific borehole.
    - **TReal** – Actual ground temperature at the borehole locations.
    - **T** – Temperature field within a user-defined calculation plane.
     

Updated and New Templates

• Low-Temperature Network
  The existing low-temperature network template has been extended and updated.
  • PE pipes are now available from the database.
  • Three different network configurations are provided.
  • A new third configuration introduces a **meshed network topology with two energy plants**.
  • The two plants are controlled dynamically according to the network load.
  • Waste heat integration has been added.
  • The previous star-shaped network configuration has been extended to demonstrate a meshed network topology.
     
• Secondary Network
  New template demonstrating the interaction between a primary and secondary district energy network.
  • Includes two separate networks within the same simulation.
  • The primary and secondary networks are hydraulically separated by a heat exchanger.
  • Demonstrates energy transfer and interaction between two network levels.
     
• Heating & Cooling Network
  New template combining a district heating network and a district cooling network.
  • Includes separate heating and cooling distribution networks.
  • The cooling network is designed with a smaller capacity and network size than the heating network.
  • Demonstrates the simultaneous modelling of heating and cooling infrastructure within one district energy system.