QUT ePrints

A new design of jigger system to improve vacuum pan performance

Rackemann, Darryn W. & Broadfoot, Ross (2008) A new design of jigger system to improve vacuum pan performance. International Sugar Journal, 110(1320).

[img] PDF (1MB)
Administrators only | Request a copy from author

Abstract

A new jigger system has been designed by SRI to boost circulation and heat transfer rates in vacuum pans. The jigger system injects and distributes numerous small bubbles of steam/incondensible gases at controllable rates into the base of the pan. Circulation is improved through a combination of the rising bubbles and the increased heat transfer that results from the increased velocity of massecuite through the tubes. The jigger system offers benefits to the pan's performance throughout the entire pan cycle. Trials were undertaken during the 2004 and 2005 seasons on batch and continuous pans in Australia to determine the performance during operation with and without the jigger system. The performance was assessed by taking circulation measurements using anemometer probes, measuring heat transfer from the calandria section of the pan, monitoring the calandria pressure and steam flow rate during operation and monitoring the production rate of massecuite. The installation of the jigger system shows substantial performance improvements including reduced calandria pressure, improved heat transfer coefficients, increased circulation velocities, shorter batch pan cycle times and production of massecuites at higher brix. Additional advantages of the jigger system include relatively cheap and low maintenance, reduced need for balance water and the use of surfactants, and the pipework system does not block with massecuite so non-return valves are not required. The jigger system can be retrofitted to existing batch and continuous pans of any design.

Impact and interest:

0 citations in Scopus
Search Google Scholar™
0 citations in Web of Science®

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

ID Code: 15525
Item Type: Journal Article
Additional Information: For more information, please refer to the journal's website (see hypertext link) or contact the author.
Additional URLs:
Keywords: circulation, heat transfer, steam jigger, vacuum pan
ISSN: 0020-8841
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Fluidisation and Fluid Mechanics (091504)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400) > Chemical Engineering Design (090403)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Research Centres > Centre for Tropical Crops and Biocommodities
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2008 Darryn W. Rackemann and Ross Broadfoot
Deposited On: 07 Nov 2008
Last Modified: 25 Oct 2013 12:06

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page