Dear all,
I want to know the clarification regarding IBH function related to DLN systems.

During shutdown of GT we are reducing the load from base load to minimum load

IBH will open below 60% of load when DLN is changing the mode secondary to lean lean mixture if ibh is not opend then fault is indicating.

So my question what is the relation between IBH and DLN SYSTEM.

 

The IBH and the IGV work together to achieve DLN. All this is also tied to exhaust temp. Very sensitive process.