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Title: Temperature Mapping on the Effectiveness of Heat Exchanger Submersion on Controlling Spontaneous Combustion of Coal Piles // Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. Vol. 1: 21-26 April 2019, Saint Petersburg, Russia
Creators: Nugroho Y. S.; Fathia S. H.; Kolang I. F.; Wicaksono R. P. S.; Widiani A. S.; Zhafira H. K.; Nirbito W.; Saleh M.; Muharam Y.
Organization: Universitas Indonesia; BPPT; University of Indonesia
Imprint: Saint Petersburg, 2019
Collection: Общая коллекция
Document type: Article, report
File type: PDF
Language: English
DOI: 10.18720/SPBPU/2/k19-85
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)

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Self-ignition of low-rank coals leading to spontaneous combustion accidents remain a great challenge in coal transportation and storage for power generation. Piles compaction and removal of the hot spots are considered to be effective actions to control the hot spots during coal storage if the heavy equipment is available in stockpile area. However, more complex situations arise during coal transportation using coal barges for inter-island transports. Typical coal barges are not equipped with heavy equipment for removal of hot spots in coal self-heating situations. This work continues exploring the possibility of heat exchanger submersion in coal piles as a mean of reducing the temperature of coal piles to prevent the spontaneous combustion accident. Cylindrical reactors with different oven temperatures are used, and the temperature is mapped inside the coal bed. The effectiveness of submerging the heat exchanger in delaying and preventing heat accumulation (leading to spontaneous combustion of coal) is assessed. The method is found to be effective to prevent self-heating, which causes smoldering combustion in subcritical and slightly super-critical conditions. Numerical modeling is undertaken, and the simulation results are compared with the experimental data. Cooling by the heat exchanger could be feasible for preventing smoldering fire accidents in coal barges.

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