Waste-heat utilization – The sustainable technologies to minimize energy consumption in Bangladesh textile sector

Waste-heat utilization holds great potential for cleaner production by improving energy efficiency, reducing energy usage and enhancing engineering functionality of an industry. Utilization of waste-heat is highly neglected in textile industries of the developing countries. This study quantified the...

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Bibliographic Details
Published in:Journal of cleaner production 2017-01, Vol.142, p.1867-1876
Main Authors: Rakib, Muhammad Iftekharul, Saidur, R., Mohamad, Edzrol Niza, Afifi, Amalina Muhammad
Format: Article
Language:English
Subjects:
Energy conservation
Energy cost
Exhaust gas
Heat recovery system
Waste-heat
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Summary:Waste-heat utilization holds great potential for cleaner production by improving energy efficiency, reducing energy usage and enhancing engineering functionality of an industry. Utilization of waste-heat is highly neglected in textile industries of the developing countries. This study quantified the energy and cost saving potential of waste-heat utilization in textile industries with several case studies. It focused on the common waste-heat sources and readily implementable technologies considering both technical and economic aspects. A waste-heat recovery boiler with a capacity of 2.70 t/h ran by hot exhaust from onsite electricity generators was estimated to save annually 15,094 MWh of energy and energy cost of USD 141,280. Installing economizer reduced 4.9% of boiler fuel consumption. Approximately 10% of energy used in stenter-setting machines was saved by installing a heat-exchanger that extracted waste-heat of stenter exhaust to preheat fresh air supplied to stenter operations. A counter-flow heat-exchanger was set up for utilizing waste-heat of dyed waste water. The yearly energy saving potential was 5716 MWh along with minimizing annual energy cost of USD 47,100. A proper stem-condensate recovery system reduced water loss and 10.50% of energy saving was achieved for steam production. •The prospects of utilizing waste-heat in textile sector are presented.•Common waste heat sources of textile industries are focused.•Promising and readily applicable waste-heat recovery technologies are studied.•Necessary investment, savings and payback period are revealed.
ISSN:0959-6526
1879-1786
DOI:10.1016/j.jclepro.2016.11.098