• Login
    View Item 
    •   Home
    • Massey Documents by Type
    • Theses and Dissertations
    • View Item
    •   Home
    • Massey Documents by Type
    • Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Performance evaluation of a prototype flat-bed grain dryer : a thesis presented in partial fulfilment of the requirements for the degree of Master of Applied Science in Postharvest Technology at Massey University

    Icon
    View/Open Full Text
    01_front.pdf (2.812Mb)
    02_whole.pdf (31.95Mb)
    Export to EndNote
    Abstract
    The performance of a new prototype flat-bed grain dryer designed for experimental research was evaluated using yellow dent maize grain of two hybrids ("Clint" and "Raissa" which are hard and soft, respectively) in three separate experiments. In experiment I, grain samples at three initial moisture contents (approx. 20, 25 and 30% w.b.) were dried at three air temperatures (58, 80 and 110°C). Dryer performance parameters such as drying time, drying rate, capacity, efficiencies and energy consumption were determined and the dried grain quality attributes were also evaluated. A thin layer drying model for predicting dried grain moisture ratio was proposed. In experiments II and III, grain samples were dried at 80°C air temperature from 25% to 14.5% moisture content, cooled or tempered before assessment of grain quality attributes. Overall, the dryer performance was good in terms of its operation and effects on quality of dried grain. Both dryer operational performance and dried grain physico-mechanical properties were affected by drying air temperature, grain initial moisture content, and the post-drying treatments. Low initial grain moisture content and high drying temperatures increased dryer capacity and reduced total energy consumption for drying. However, both high drying air temperature and high initial grain moisture content increased the incidence of grain damage. Slow cooling and/or tempering of the dried grain increased grain bulk density and reduced breakage susceptibility, especially when cooled or tempered in an airtight and well insulated container. However, these two post-drying treatments did not affect grain hardness significantly. Finally, a conceptual model for evaluating and optimising the performance of mechanical grain dryer is proposed.
    Date
    1999
    Author
    Meas, Pyseth
    Rights
    The Author
    Publisher
    Massey University
    Description
    Publication arising from this thesis – Performance Evaluation of a Prototype Flat-bed Grain Dryer and Drying Characteristics of Soft and Hard Maize Hybrids can be viewed in the print copy held at the Library.
    URI
    http://hdl.handle.net/10179/14641
    Collections
    • Theses and Dissertations
    Metadata
    Show full item record

    Copyright © Massey University
    Contact Us | Send Feedback | Copyright Take Down Request | Massey University Privacy Statement
    DSpace software copyright © Duraspace
    v5.7-2020.1
     

     

    Tweets by @Massey_Research
    Information PagesContent PolicyDepositing content to MROCopyright and Access InformationDeposit LicenseDeposit License SummaryTheses FAQFile FormatsDoctoral Thesis Deposit

    Browse

    All of MROCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Copyright © Massey University
    Contact Us | Send Feedback | Copyright Take Down Request | Massey University Privacy Statement
    DSpace software copyright © Duraspace
    v5.7-2020.1