NDLI: Design Considerations and Heat Transfer Enhancement of CFB Heat Exchangers for Flue Gas Heat Recovery

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Jun, Yong-Du Lee, Kum-Bae Ko, Seok-Bo Islam, Sheikh Zahidul
Copyright Year	2005
Abstract	Now-a-day’s energy recovery process in the industry is a common practice for improving the production process while major concern goes to environment. The performance of the heat exchangers, used for the purpose of recovering energy, decreases continuously with time due to fouling depending on surface temperature, surface condition, construction material, fluid velocity, flow geometry and fluid composition. To overcome the fouling of fly ash on the heat transfer surface and erosion and periodical cleaning which are the major drawbacks in conventional heat exchangers for flue gas heat recovery, a no-distributor-circulating-fluidized-bed (NDCFB) heat exchanger with automatic particle controlling is devised. One of the main advantages of this model is the reduced pressure drop through the entire heat exchanger system, while increasing heat transfer performance. The research started with a single riser system with multiple down comers and multi-riser system is also studied. The heat transfer performance and pressure drop have been evaluated through experiments for these gas-to-water lab scale heat exchanger systems. However, due to the operational complexity, these two models are not readily applicable to real applications. As a derivation of the previous studies regarding the no-distributor CFB heat exchangers, third generation model of the heat exchanger is now under investigation.
Sponsorship	Heat Transfer Division and Electronic and Photonic Packaging Division
Starting Page	757
Ending Page	763
Page Count	7
File Format	PDF
ISBN	0791847322
DOI	10.1115/HT2005-72184
e-ISBN	0791837629
Volume Number	Heat Transfer: Volume 2
Conference Proceedings	ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
Language	English
Publisher Date	2005-07-17
Publisher Place	San Francisco, California, USA
Access Restriction	Subscribed
Subject Keyword	Circulating fluidized bed (cfb) Fouling Heat transfer coefficient Heat exchanger Design Flue gases Heat exchangers Heat recovery Heat transfer
Content Type	Text
Resource Type	Article

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FOULING REDUCTION CHARACTERISTICS OF A CIRCULATING FLUIDIZED BED HEAT EXCHANGER

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Design Considerations and Heat Transfer Enhancement of CFB Heat Exchangers for Flue Gas Heat Recovery

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