Oil Forced Water Forced Cooling of Transformers is a method of cooling Transformers in which oil is forced through the transformer by means of pumps. The oil which is thus forced through the transformer collects the heat from the transformer. This oil is then passed through a cooler (heat exchanger) which has water as the other medium. The water which collects the heat from the oil is pumped to a cooling tower where the heat is dissipated.
The OFWF method of cooling is similar to OFAF (Oil Forced Air Forced) method of cooling.