Neue Simulation
Parameter
°
°
System-Diagramm
Das Diagram des TTES-Systems
  1. 1) a heat sink: the demand. Note the small pipe icon embedded into the sink’s icon. This is the network side pump.
  2. 2) a “double pipe”, two parallel pipes, one for the hot supply and one for the cold return, insulated against each other and against the ground. This pipe models the DH network. It includes a model of the soil surrounding the two pipes to account for gains from, and losses to, the ground.
  3. 3) A valve for mixing the supply with the return. It used to ensure that the supply temperature does not get too high. The valve can assume any position between 0 and 1, inclusive. The positions 0 and 1 are indicated in the figure.
  4. 4) A “gas boiler”. There isn’t any proper model behind this component. It simply sets the supply tem- perature to at least the set point supply temperature and records the energy required to do that. The energy needed by this component represents the energy that could not be provided by either source 11) or 12) (see below)
  5. 5) A by-passing valve. Its position is either 0 or 1. The valve switches to 1 if the return temperature of the network is above the temperature of the mass flow at the “0” outlet of 6)
  6. 6) A stratifying valve (can be at 0 or 1) for switching between the storage inlets at 8) and 9) when charging the storage. The valve position will be chosen such that the temperature at the storage inlet is closer to the supply temperature going into the valve.
  7. 7) The TES tank
  8. 8) The tank inlet for charging with high temperatures / The tank outlet for discharging.
  9. 9) The tank inlet for charging with lower temperatures.
  10. 10) The cold tank inlet/outlet. Due to technical limitations of the simulation framework, storage ports must come in pairs. In reality, only one port would be needed instead of the two used at 10). Therefore, there immediately combined using the T-piece.
  11. 11) The solar thermal collector field heat source
  12. 12) The user-defined heat source
  13. 13)The pump for the primary loop of the solar thermal system
  14. 14) The pump for the secondary loop of the solar thermal system
  15. 15) The pump for the secondary loop of the user-defined source (the pump for the primary loop is “built into” the source as is indicated by the small pump inside the source’s icon)