Their purpose is to maintain the ambient temperature of the water environment at the optimum level for fish growth and wellbeing. In a system of this type, because the volume of incoming cold water is low, there is a risk of the ambient temperature rising above the optimum. The standard unit is able to cool 40 cubic metres of water per hour. Depending on the outdoor temperature, the unit will reduce the water temperature by between 2 C and 6 C. Units can be delivered with a capacity ranging from 15 cubic metres and upwards to meet specific requirements.
Capacity is determined by the internal cooling area.
The cooling unit is built into a steel tank which stands vertically. Water is fed into the top of the unit and flows downwards through the cooling media. Air is sucked out upstream to ensure an effective contact area between air and the process water. The ventilator of a standard unit uses 5.5 kW of electricity. A pump for supplying water is also required.