Technical terms

Flow rate
Q_min [I/min]

Coolant flow rate required for nominal operation or continuous
operation of the component to be cooled. This information is contained in the documentation of the respective product.

Pressure drop
Δp [bar]

Necessary pressure difference of the coolant between the coolant inlet and coolant outlet in order to achieve the minimum flow rate in the component to be cooled. This information is contained in the documentation of the respective product.

Power loss
P_L [W]

Power loss occurring during nominal operation or continuous operation that must be dissipated by the cooling system. The cooling unit can be dimensioned based on the sum of the power losses of all components in the cooling circuit. This information is contained in the documentation of the respective product.

Operating pressure
p_max [bar]

Permanently permissible maximum pressure in the cooling system during operation.

Coolant inlet temperature
T_I [°C]

Inlet temperature of the coolant to operate the component to be cooled with the data specified in the respective documentation in nominal operation or continuous operation. A higher coolant inlet temperature may cause a reduction in the performance of the
product in nominal operation or continuous operation. A coolant inlet temperature below the dew point temperature promotes the formation of condensation on and in the cooled component, which must be avoided.

Dew point temperature
T_D [°C]

Temperature at which the humidity contained in the ambient air condenses and precipitates on solid surfaces.

Coolant temperature increase
ΔT_max [bar]

Permissible increase in coolant temperature during nominal operation or continuous operation with power loss P_L. This information can be found in the documentation of the respective product.

Relative air humidity
φ [%]

Relative air humidity is the ratio of the current amount of water vapor in the air to the maximum amount of water vapor possible at a given temperature, expressed as a percentage. 100 % indicates full saturation, lower values indicate that the air can still absorb more humidity.