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

Russul Mohammed,Hashim Hussein,Ali Numan

doi:10.30684/etj.v39i9.1998

Russul Mohammed, Hashim Hussein + Show 1 more

Open Access

https://doi.org/10.30684/etj.v39i9.1998

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Abstract

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.

Highlights

Boilers are closed containers in which water is transferred to steam under pressure and through the application of heat
The Low-level water in the drum makes increasing in the steam, and when the water level high that causes carryover water into the steam header and decreasing the steam in the drum [3]
The experimental process of this work was applied to the steam generator of the boiler in Baghdad / Iraq (AlQuds power plant) model

Summary

Introduction

Boilers are closed containers in which water is transferred to steam under pressure and through the application of heat. The furnace of a boiler can convert the chemical energy in the fuel to heat, and it is the function of the boiler to transfer this heat to the contained water in the most efficient technique. This heat is transferred by radiation, conduction, and convection to the water in the boiler [1]. The relative percentage of each depends on the type of boiler, the heat transfer surface built for, and the type of fuel. The level controller sensing an elevation in the level of the pressure cycles of the drum will be caused variation in drum level [5]

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Conclusion