Open AccessExergy Criteria of Performance of Waste Heat Recovery Applied for Marine Auxiliary Boiler
Author(s) -
Jitendra Singh Pal,
S. N. Sapali,
Anil Tumkur Ramakrishna,
Niyaj Dilavar Shikalgar,
Ajit Shinde
Publication year - 2022
Publication title -
heat and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.283
H-Index - 29
ISSN - 0392-8764
DOI - 10.18280/ijht.400135
Subject(s) - exergy , boiler (water heating) , nozzle , combustor , combustion , exergy efficiency , waste management , waste heat recovery unit , nuclear engineering , environmental science , engineering , process engineering , mechanical engineering , heat exchanger , chemistry , organic chemistry
Auxiliary boilers onboard motor ships are the subject of ongoing research. Steam is produced by an auxiliary boiler for fuel heating and cargo oil pumping turbines. This marine boiler is a pressure jet burner water tube auxiliary boiler with a 70-80% efficiency rating. The goal of determining the process and components of irreversibility loss in a system is to identify the process and components of exergy losses. The second law of thermodynamics and the concept of irreversible entropy production are the foundations of this study's exergy technique of analysis. This concept of considering entropy at a given steady-state condition rather than as a change in a process is also one of the features of this exergy analysis of the marine oil-fired boiler. The exergy loss in the combustion chamber was calculated and determined to be 35024 kJ, which is the maximum irreversibility in this maritime auxiliary boiler. A numerical analysis of the current nozzle jet burner is undertaken to evaluate the enhancement of the combustion process. The temperature and velocity contour of the fuel stream passing through the nozzle of this auxiliary boiler's burner depicts atomization.