Document Details


Title:
Analysis/control of in-bed tube erosion phenomena in the fluidized bed combustion (FBC) system. Technical progress report number 10
Author(s):
(Lee, S.W.)
Subject Terms:
FLUIDIZED-BED COMBUSTORS/; EROSION/; PROGRESS REPORT; EROSION; MITIGATION; TUBES; DESIGN; PERFORMANCE; FLOW VISUALIZATION; SHAPE; DOCUMENT TYPES
Document Location:
U.S. Deptartment of Commerce, Technology Administration, National Technical Information Service, Springfield, VA, 22161, Phone:(703) 487-4650, Fax:(703) 321-8547
Document Categories:
Science and Technology\General
Document Type:
REPORT
Publication Date:
1995 Apr 30
Declassification Date:
1996 Feb 08
Declassification Status:
Declassified
Document Pages:
10
Accession Number:
OOLDE98050071
Document Number(s):
DOE/MT/92021-T8; 98020050DE98051943
Originating Research Org.:
Morgan State Univ., Baltimore, MD (United States). School of Engineering
OpenNet Entry Date:
1998 Sep 03
Description/Abstract:
Using the basic principle of flow disruption as a method of preventing erosion, different types of anti-erosion tubes were designed and tested. The main function of these protective devices was to decrease the bubble momentum and form a stagnant layer of bed material on the tube surface by changing the local flow pattern. The ball-studded tube with the in-line pattern was less effective in reducing weight loss than the ball-studded tube with the staggered pattern. The staggered, ball-studded tube had a erosion rate that was three times lower than that of a regular tube. It is believed that the flow drag of the in-line pattern was less than that of the staggered pattern, permitting a higher particle velocity and, therefore, a higher erosion. According to these results, the finned/ball-studded tube is considered a more effective protective device than either the finned tube or the ball-studded tube in terms of tube erosion in FBC.


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