A maior geradora de energia limpa e renovável do planeta

Press Office
At the heart of Itaipu: the water course
Tamanho da letra
31/03/2009

Not all water that arrives at a generating unit turns into energy. While a large part of it enters the turbine’s spinning system, the rest has a different destination: it is used for cooling machine equipment and transformers.  

Not all water that arrives at a generating unit turns into energy. While a large part of it enters the turbine’s spinning system, the rest has a different destination: it is used for cooling machine equipment and transformers.

 

 

 

 

In order for this small amount to fulfill its role, a network of pipes spread throughout the power station to the generating unit, with the spiral casing as the starting point. 

 

Keeping this water web in operation is the role of the Auxiliary Service Mechanic Maintenance Division (SMMA.DT). In the U07 shutdown, the team led by mechanical engineer Gerson Pretti inspected the piping, valves, filters and reservoirs and carried out the necessary maintenance.

 

After passing through the spiral casing, part of the water is caught and taken to a filter called cuno-flo, on elevation 92, where an average flow of 38,000 liters of water passes per minute.  The job is to trap particles larger than 1 millimeter in diameter in water that continues on to cool the unit and the transformers. 

 

“We cleaned the filter completely”, said Gerson.  According to him, when the unit is in operation, the filter undergoes constant automatic cleaning.  The maintenance confirmed whether this automatic system was working well.  It was.

 

Refresher for the transformers

 

After passing through the filter, part of the water continues on to the generating unit. Another part is stored in a reservoir on elevation 111, RWR, and from there it goes to the transformers' heat exchangers.  There are 28,000 liters stored, which run through the piping at an average flow of 4.800 liters per minute in the direction of the transformers.

 

Three floating valves maintain the reservoir level constant.  The SMMA.DT team dealt with recovering the valves and their rods, worn out by water corrosion.  The reservoir also underwent repairs carried out by staff from Civil Maintenance.

 

Talking about transformers, look out for the maintenance carried out in the transformers on elevation 108, coming soon.