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| DOC9085G
SLP2100/2700/3100
3.3 Fan cooler
The fan cooler will increase the heat output from the construction and thereby stabilize the temperature
at a lower level. However, this cooler will use the air to cool down the water and therefore we will always
see that the temperature will be stabilized above the ambient temperature. It’s very simple to find the right
cooler based on the curves from the cooler manufacturer. Typically you will find the cooler capacity as kW/
Δt meaning for example 1.5 kW cooler capacity each °C in temperature difference between the water and
the air. Note that the water flow through the cooler will also affect the cooling capacity.
DOC1627392
Typical fan cooler characteristic.
Practical calculation example:
The truck is used mostly to work with an operation pressure around 70% vacuum. From the technical data
sheet, we find the heat input from the pump to be 68 kW.
The liquid separator is built inside the slurry tank with a good contact to the product and a radiator effect
estimated to 20 kW with a temperature difference of 20°C.
The truck will work with ambient temperature up to 28°C during the summer and we will accept a maximum
temperature on 40°C.
First, we have to reduce the radiator effect based on a temperature difference of 12°C.
Q
out Truck
= 20
x
12
= 12 kW
20
The total cooling effect required is thereby:
Q
out Pump
- Q
out Truck
= 68 - 12 = 56 kW
