.DisHeatLib.Substations.BaseStations.StorageTankHex

Information

This is a model for a district heating substation storage tank with an internal heat exchanger. Its main components are the storage tank with internal heat exchanger, a flow regulating valve/pump, an expansion vessel and a controller that maintains the temperature in the selected tank layer by setting the position of the flow regulating valve/pump to open or closed.

A mismatch between the setpoint and the actual value of the secondary supply temperature can have different reasons:

• The differential pressure at the station is too low, resulting in a too low mass flow at the primary side even if the valve is completely open.
• The nominal mass flow rate at the primary side is too low, leading to a too low secondary supply temperature even with a fully opend valve.
• The supply temperature at the primary side is too low, i.e., lower than the tank temperature setpoint, leading to a fully opened valve