Heat transfer coefficient of flowing wood pulp fibre suspensions to monitor fibre and paper quality

Kazi, S.N. and Duffy, G.G. and Chen, X.D. (2015) Heat transfer coefficient of flowing wood pulp fibre suspensions to monitor fibre and paper quality. Applied Thermal Engineering, 78. pp. 172-184. ISSN 1359-4311

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Abstract

Heat transfer measurements were obtained for a range of suspensions of wood pulp fibre flowing through a pipeline. Data were generated over a selected range of flow rates and temperatures from a specially built flow loop. It was found that the magnitude of the heat transfer coefficient was above water at equivalent experimental conditions at very low fibre concentrations, but progressively decreased until it was below water at slightly higher concentrations. It was found that the heat transfer was affected by varying fibre properties, such as fibre length, fibre flexibility, fibre chemical and mechanical treatment, the variation of fibres from different parts of the tree as well as the different pulping methods used to liberate the fibres from the wood structure. Heat transfer coefficient was decreased with the increasing of fibre flexibility as found by previous workers. In the present investigation properties of fibre and paper are correlated with heat transfer to suspensions of fibres. Variations in fibre characteristics can be monitored in flowing suspension of fibres by measuring heat transfer coefficient and using those measurements to adjust the degree of fibre refining treatment so that papers made from those fibres are more uniform, more consistent and within product specification. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: ISI Document Delivery No.: CC1JJ Times Cited: 0 Cited Reference Count: 37 Cited References: BOBKOWIC.AJ, 1965, CAN J CHEM ENG, V43, P87 Chaouche M, 2001, J RHEOL, V45, P369, DOI 10.1122/1.1343876 Colebrook C.R., 1939, J I CIVIL ENG, V11, P133, DOI 10.1680/ijoti.1939.13150, DOI 10.1680/IJOTI.1939.13150 DINH SM, 1984, J RHEOL, V28, P207, DOI 10.1122/1.549748 Duffy G. G., 2000, P 54 ANN APP C MELB, V2, P605 Duffy G. G., 2002, P 56 ANN APP C ROT N, P119 Duffy G. G., 1978, APPITA, V25, P363 Duffy G.G., 2011, APPL THERM ENG, P1 DUFFY GG, 1978, APPITA, V31, P280 Eissa Y.Z., 1983, FLOW RESISTANCE ROTA HEIKKURINEN A, 1991, PAP PUU-PAP TIM, V73, P411 Kazi S.N., 2001, THESIS U AUCKLAND AU Kazi SN, 1999, CHEM ENG J, V73, P247 Kazi S.N., 1998, IPENZ C AUCKL NZ Kazi SN, 2014, INT J THERM SCI, V79, P146, DOI 10.1016/j.ijthermalsci.2014.01.001, 10.1016/Mthermalsci.2014.01.001 KEREKES RJE, 1972, CAN J CHEM ENG, V50, P228 KIBBLEWH.RP, 1972, APPITA, V26, P196 Leena P., 1993, PAPERI JA PUU PAPER, V75, P689 Lin JZ, 2003, INT J MULTIPHAS FLOW, V29, P1355, DOI 10.1016/S0301-9322(03)00086-7 LIN JZ, 2004, AEROSOL SCI, V35, P63 Lin JZ, 2006, APPL MATH MODEL, V30, P1010, DOI 10.1016/j.apm.2005.08.005, 10.1016/j.apm.20050.08.005 Lu ZM, 2006, CHEM ENG SCI, V61, P4998, DOI 10.1016/j.ces.2006.03.051 Martinelli R.C., 1947, Transactions of the ASME, V69 Middis J, 1994, THESIS U AUCKLAND AU MIDDIS J, 1994, APPITA J, V47, P154 MOHLIN UB, 1975, SVEN PAPPERSTIDN, V78, P412 Olson JA, 1998, J FLUID MECH, V377, P47, DOI 10.1017/S0022112098002973 PAULAPURO H, 1976, PULP PAP-CANADA, V77, P103 Ramazani S.A., 2001, J RHEOL, V45, P945, DOI DOI 10.1122/1.1378026 Reynolds O., 1901, SCI PAPERS, V1 Ritala R., 1987, NORD PULP PAP RES J, V2, P15 Schniewind A. P., 1966, CONSOLIDATION PAPER Shallhorn P.M., 1981, J PULP PAP SCI, V7, P69 Strand B.C., 1989, INT MECH PULP C HELS TamDoo P.A., 1982, PULP PAP-CANADA, V83, P46 Wahjudi U., 1999, 52 APP ANN GEN C MEL You ZJ, 2004, FLUID DYN RES, V34, P251, DOI 10.1016/j.fluiddyn.2004.01.002 Kazi, S. N. Duffy, G. G. Chen, X. D. High Impact Research Grant UM.C/625/1/HIR/MOHE/ENG/45; UMRG Grant RP012D-13AET; Faculty of Engineering, University of Malaya, Malaysia; University of Auckland, New Zealand The authors gratefully acknowledge High Impact Research Grant UM.C/625/1/HIR/MOHE/ENG/45 and UMRG Grant RP012D-13AET, Faculty of Engineering, University of Malaya, Malaysia and The University of Auckland, New Zealand for support to conduct this research work. 0 PERGAMON-ELSEVIER SCIENCE LTD OXFORD APPL THERM ENG
Uncontrolled Keywords: Pressure drop, Heat transfer, Wood pulp fibre, Fibre concentration, Fibre flexibility, TURBULENT-FLOW, DRAG REDUCTION, MOTION,
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 22 Sep 2015 00:20
Last Modified: 22 Sep 2015 00:20
URI: http://eprints.um.edu.my/id/eprint/14007

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