The internal cooling circuit 113
The internal cooling circuit
What this chapter contains
This chapter describes the internal cooling circuit.
Hardware description
General
The cooling system of a liquid-cooled wind turbine converter consists of two circuits: firstly,
the internal cooling circuit that covers the heat-generating electrical components and
transfers the heat to the cooling unit, and the external cooling circuit that is usually part of
a larger external cooling system. This chapter deals with the internal cooling circuit. Liquid
cooling unit is not included in the ABB deliveries (the liquid cooling system of the converter
does not include eg, pump, expansion tank etc.).