Inside...

Looking at the tubing plate of the glycol heater of unit EC 4.
This heat exchanger heats up glycol which is circulated through huge radiators in our air intake for the gasturbine.
When the ambient temperature drops below appr. 5° C a pump starts circulating the glycol so warming up the air. (the dewpoint of the air is involved in it too but that will be a bit boring to you).
Now we also use the exchanger to increase the efficiency of the gasturbine because it works the best at ambient temperatures of ± 15°C.

But: it's heated with steam and the condensated steam (condensate) is lead to the main condenser of the unit.
The conductivity of that water became too high and the search for a leak begun...
It appears that some pipes in the bundle are porous. So now experts have to find out how that can happen...

Here in LARGE....