Optimum quantity of steam injected as radiant fluid in contraflow regenerators

Radiant fluids like CO₂ and H₂O, present in the flue gases, improve the heat transfer coefficient of hot gas in regenerator practice. On the same lines it has been suggested that the heat transfer coefficient of cold fluid (generally air) could be improved by steam injection. Some promising results have been published in this field. The additional steam goes to the combustion chamber and flue gases. Steam has higher specific heat and picks up heat from the process work. This fact requires the reassessment of hot gas inlet temperature (t_h,in) to the regenerator.

The results are represented in this paper taking care of the above fact. In earlier papers the process temperature was kept constant and heat picked up by steam ignored, for calculation of effectiveness.