.Buildings.DHC.Plants.Cooling.Examples.StoragePlantDualSource

Information

The modelled system is described in the documentation of Buildings.DHC.Plants.Cooling.StoragePlant.

The source blocks give the system the following operation schedule during simulation:

• At time = 0, the system is all off.
• At time = 200, the system is commanded to charge the tank. The chiller is available and charges the tank locally. After some time, the charging stops when the tank status signal returns that the tank is charged.
• At time = 1800, load appears at the district network. The storage plant starts producing CHW to the system. Currently the tank is not commanded to charge or discharge, therefore it functions like a common pipe and the CHW is supplied by the chiller.
• At time = 3500, the load increases and there is no more overflow through the tank.
• At time = 4000, the system is commanded to have the tank take priority for CHW production. After some time, the cooling in the tank is empty and the tank stops producing. Now the chiller takes over.
• At time = 7000, there is no longer load in the district system. The system is back to the all-off state.
• At time = 7500, the system is once again commanded to charge the tank, but the chiller in the storage plant is not enabled. The tank is therefore charged remotely by the district. This stops once the tank is charged again.

Implementation

The chiller is implemented as an ideal temperature source using Buildings.Fluid.Sources.PropertySource_T. Its outlet temperature is always at the prescribed value.

Contents

Name	Description
Medium	Medium model for CHW

Revisions

• July 31, 2023, by Michael Wetter:
  Revised implementation, removed unused parameter.
• January 11, 2023 by Hongxiang Fu:
  First implementation. This is for #2859.