NDLI: A Thermoelectric Waste-Heat-Recovery System for Portland Cement Rotary Kilns

Content Provider	Springer Nature Link
Author	Luo, Qi Li, Peng Cai, Lanlan Zhou, Pingwang Tang, Di Zhai, Pengcheng Zhang, Qingjie
Copyright Year	2014
Abstract	Portland cement is produced by one of the most energy-intensive industrial processes. Energy consumption in the manufacture of Portland cement is approximately 110–120 kWh ton$^{−1}$. The cement rotary kiln is the crucial equipment used for cement production. Approximately 10–15% of the energy consumed in production of the cement clinker is directly dissipated into the atmosphere through the external surface of the rotary kiln. Innovative technology for energy conservation is urgently needed by the cement industry. In this paper we propose a novel thermoelectric waste-heat-recovery system to reduce heat losses from cement rotary kilns. This system is configured as an array of thermoelectric generation units arranged longitudinally on a secondary shell coaxial with the rotary kiln. A mathematical model was developed for estimation of the performance of waste heat recovery. Discussions mainly focus on electricity generation and energy saving, taking a Φ4.8 × 72 m cement rotary kiln as an example. Results show that the Bi$_{2}$Te$_{3}$–PbTe hybrid thermoelectric waste-heat-recovery system can generate approximately 211 kW electrical power while saving 3283 kW energy. Compared with the kiln without the thermoelectric recovery system, the kiln with the system can recover more than 32.85% of the energy that used to be lost as waste heat through the kiln surface.
Starting Page	1750
Ending Page	1762
Page Count	13
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	44
Issue Number	6
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2014-12-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thermoelectric rotary kiln waste heat recovery energy saving mathematical model Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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