ISSN Online: 2688-7231
ISBN Online: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Assessment of Exergy Loss Rate in Marine Boiler to Analyze the Performance of Waste Heat Plant by the Exergy Method
The current research is for auxiliary boilers on board motorships. An auxiliary boiler produces steam for fuel heating and cargo oil pumping turbines. This marine boiler is a water tube auxiliary boiler with a pressure jet burner and a 70-80% efficiency rating. Assessment of exergy loss aims to identify the process and components of exergy losses in a system. The irreversible creation of entropy induced by the nonideal performance inherent in the auxiliary boiler systems and components causes these exergy losses throughout the system. The approach adopted evaluates the existing boiler system, and exergy is calculated based on a final heat-sink reference. The maximum work available is in the initial energy source of the system. The highest irreversibility is found at the combustion chamber and the exergy loss is 32010 kJ. A computational fluid dynamic study of the existing pressure jet burner is performed to investigate the enhancement of the combustion process. Atomization is visualized by the thermal and velocity contour of the fuel stream through the nozzle of the burner of this auxiliary boiler.