An investigation of milk powder deposition on parallel fins

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dc.contributor.authorWalmsley, Timothy Gordon
dc.contributor.authorWalmsley, Michael R.W.
dc.contributor.authorAtkins, Martin John
dc.contributor.authorNeale, James R.
dc.coverage.spatialWellington, NZ
dc.date.accessioned2014-12-16T21:14:32Z
dc.date.available2012-09-23
dc.date.available2014-12-16T21:14:32Z
dc.date.issued2012-09-23
dc.description.abstractOne method to reduce the energy consumption of industrial milk spray dryers is to recover waste heat from the exhaust dryer air. A significant challenge associated with this opportunity is the air contains a small amount of powder that may deposit on the face and surfaces of a recuperator. This paper introduces a novel lab based test that simulates powder deposition on a bank of parallel plate fins at exhaust dryer air conditions. The fin bank acts like the face of a typical finned tube row in a recuperator. The aim of this study is to look at how deposition on the front of fins is affected by the air conditions. Results show similar characteristics to other milk powder deposition studies that exhibit a dramatic increase in deposition once critical stickiness levels are reached. As powder deposits on the face of the fins, the pressure drop across the bank increases until eventually an asymptote occurs, at which point the rates of deposition and removal are similar. For very sticky conditions, deposition on the face of the fins can cause a rise in the pressure drop by as much as 65%. The pressure drop has also been successfully related to the percentage of open frontal area of the fins with and without deposition. Deposition inside and at the rear of the fin bank was found to be minimal.
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dc.format.mimetypeapplication/pdf
dc.identifier.citationWalmsley, T. G., Walmsley, M. R. W., Atkins, M. J., & Neale, J. R. (2012). An investigation of milk powder deposition on parallel fins. Presented at the Annual Conference of Australian and NZ Chemical Engineers, Wellington, NZ, 23- 26 September 2012.en
dc.identifier.urihttps://hdl.handle.net/10289/9010
dc.language.isoen
dc.relation.urihttp://www.chemeca2012.com/
dc.rights© 2012 copyright with the authors.
dc.sourceAnnual Conference of Australian and NZ Chemical Engineers
dc.titleAn investigation of milk powder deposition on parallel fins
dc.typeConference Contribution
pubs.elements-id23342
pubs.finish-date2012-09-26
pubs.organisational-group/Waikato
pubs.organisational-group/Waikato/FSEN
pubs.organisational-group/Waikato/FSEN/Engineering
pubs.organisational-group/Waikato/FSEN/School of Science
pubs.organisational-group/Waikato/FSEN/School of Science/Earth & Ocean Sciences
pubs.start-date2012-09-23
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