As CPD increases, exhaust temperature decreases

As CPD increases at the same Firing Temp. the Exhaust Temp will become slightly lower due to the increased cooling flow. As Exhaust Temp. is the basis for Temperature Control, this would allow us to increase load to come back to the same Exhaust Temp. point. but the increase in load would allow the firing temp to increase. We don't want this to happen as we would be over firing the machine. so, as the CPD increase, we reduce the Exhaust Temp. control setpoint to maintain a constant Firing temp.

If this is correct then how load is increased with higher CPD in winter???