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Assessment of the thermal performance and energy conservation opportunities of a cement industry in Indonesia

journal contribution
posted on 06.12.2017, 00:00 by Mohammad Rasul, W Widianto, B Mohanty
A simple model is presented to assess the thermal performance of a cement industry with an integrated view to improve the productivity of the plant. The model is developed on the basis of mass, energy and exergy balance and is applied to an existing Portland cement industry in Indonesia. The data obtained from industry show that the burning efficiency and the second law efficiency of the kiln system are 52.07% and 57.07% respectively. Cooler efficiency and heat recovery efficiency are 47.75% and 51.2% respectively. The unaccounted loss at kiln system was found to be 1.85% and that of cooler system was 19%. The high loss at cooler was mainly due to the convection and radiation losses from the uninsulated cooler. Irreversibility of the system was found to be about 20%, which is due to the conversion from chemical to thermal energy. The thermal energy conservation opportunities are identified. This study show that by replacing industrial diesel oil (IDO) with waste heat recovery from kiln and cooler exhaust for drying of raw meal and fuel, and preheating of combustion air, a cement industry in Indonesia can save about 1.264 x 10 5 US dollars per year.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

25

Issue

17-18

Start Page

2950

End Page

2965

Number of Pages

16

ISSN

1359-4311

Location

Netherlands

Publisher

Elsevier

Language

en-aus

Peer Reviewed

Yes

Open Access

No

Era Eligible

Yes

Journal

Applied thermal engineering.