OCR Text |
Show AIRFLOW CONTROL There are several methods of controlling airflow in multiple burner applications. Three such methods are: 1) Air diffusion local to the burner inlets. 2) Individual air ducts supplying air to each burner. 3) Model investigation. Methods 1 and 2 do not ensure an ability to achieve optimum airflow and must, by nature of their application, absorb energy; consequently, they add a continuing operating expense through wasted fan power. Method 3, on the other hand, ensures optimum airflow, and, although it requires additional capital outlay, it offers ongoing savings in operating expenses through low excess air operation. 12-14 |