DryCoolingTower

Use

A dry cooling tower can cool a medium with the help of outside air. The medium remains in a closed circuit. To increase the heat transfer to the surrounding air a ventilator is used to increase the air volume over the heat exchanger. This raises the heat transfer coefficient of the system.

Parameters and Connectors

The cooling medium (defined by cpMedCooling and rhoMedCooling) is transferred to the cooling tower via the ▶FlowCooling and ▶ReturnCooling pipes. The target temperature that the cooling medium should reach in the cooling tower can be transferred via the ▶TRefCooling connection. ▶EnvironmentConditions must also be connected to define the outside air temperature.

The parameter dialog can be used to characterize the dry cooling tower model. To adapt the cooling tower to higher cooling power (i.e. imitation of higher heat exchanger surfaces) only the heat transmission coefficient alphaHeatTrans needs to be modified. Parameters such as the heat transfer rate during downtimes (QLossRate) and the volumes of the cooling medium (VCooling) and the air (VAir) can be used to validate and fine-tune the model.

Input ▶EnableVent can be used to enable the fan. With the parameters of the pressure drop (deltaP), efficiency (etaVent) and power factor (cosphiVent) the power requirement (▶LVGrid3) of the fan can be calculated. Different connections like one- or three-phase (Phase) and voltage levels (GridType) are possible.

If ventilation is enabled, the air volume flow (qvVent) is determined based on the ▶TRefCooling and the current TReturnCooling of the cooling medium and the maximum air volume flow (qvVentMax). The system settings deltaTCoolingMin and deltaTCoolingMax have to be set as well.

Model Background