Thank you very much for your quick answer.
We use to operate our machines in the lowest region of the allowed band,that is 95% H2 purity for us. This summer has been so hot and we have experienced some trouble to keep cold gas temperature within the recommended 46C, so we've had to lower power to meet the Temperature limit. Later on, we decided to increase H2 purity to a 98% and it worked fairly good, so, full power could be recovered. Some still think that such a small detail alone can be responsible for the cold gas temperature decrease we've obtained, and I'd like to know if anybody has experienced a similar situation to confirm or discard this fact.
> About the best answer for your turbine is to trend purity
> and cold gas temperature--presuming cooling water
> temperature/flow-rate is relatively constant as well as load
> (real and reactive).
This is what I've done in my unit and I've found a rough 0.8 C cold gas decrease for every 1% increase in H2 purity. I'd like to know if this figures could be right enough.