An Experimental Investigation of The Dynamic Effects in Upper Drum Boiler Under Steam Mass Flow Rate Variation

Abstract

 Rapid rise in the steam mass flow rate causes the increase in dynamic effects.  The pressure disturbance in the boiler's upper drum cause mechanical effects.  Drum level fluctuations cause interactions with the controls of boiler combustion.  Interactions with the controls, resulting inefficient and dangerous operations.The dynamic effects in the "upper" drum of the boiler (mechanical's effects) are very complex problems and critical due to the pressure disturbance in the upper drum of the boiler. This work deals with an experimental investigation of the dynamic behavior of the boiler drum level system is reported from plant data (Al-Quds power plant) in Baghdad / Iraq under a particular condition of operating, and the mathematical equations of the boiler model variables explained and defined. The dynamic effects are investigated with increasing steam mass flow rate (10% and 20%) at the outlet of the boiler. The results showed that the rapid rise in the rate of steam mass flow causes the dynamic effects to increase (shrink and swell) by 15%, rates of evaporation and thus causes an increase in the volume of water inside the upper drum boiler that causes overheating in the tubes.