Controlled Reservoir (TL)

A Reservoir (TL) unit is a vessel of unlimited volume with constant temperature and pressure. The reservoir can be open (atmospheric) or have a set constant pressure. Port A corresponds to the input to the reservoir. Port P receives the set pressure signal in the tank. Port T accepts the set temperature signal in the tank.

If the Controlled parameters are checked, the tank pressure and temperature are controlled by the scalar input signals at ports P and T. If Controlled is unchecked, the pressure and temperature are constant and are set using the Reservoir pressure and Reservoir temperature parameters, respectively.

The inlet temperature depends on the direction of fluid flow. If the liquid flows into the reservoir, the inlet temperature is equal to the upstream liquid temperature and the reservoir acts as a heat sink (heat sink). If the liquid flows out of the reservoir, the inlet temperature is equal to the reservoir temperature and the reservoir acts as a heat source.

To ensure that the temperature at the inlet of the reservoir changes smoothly as the flow direction changes, the block is modelled by heat conduction over a length equal to the effective diameter of the inlet cross-section. This diameter depends on the given cross-sectional area of the port A.