2026-09-20T04:22:33Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/552722022-01-13T07:54:36Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
John G. Brisson II.
Lopez, David M
Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
Massachusetts Institute of Technology. Department of Mechanical Engineering
2010-05-25T21:13:31Z
2010-05-25T21:13:31Z
2009
2009
http://hdl.handle.net/1721.1/55272
613220395
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 122-124).
This document details the conception, design, and testing of a series of prototype powder-pelletizing devices for use with an ice confection powder produced using a CO2 spray freezing process. The device must function at a temperature of 233 K and at pressures of up to 12 bar(a) and must produce at least 500 pellets for use in consumer testing. Design considerations include stress analysis for critical parts, minimization of powder flow path length, formulation of requirements of thermal management system, implementation of the powder compression methods, examination of various agitation methods, and the testing of the prototype apparatus. Trials proved the concept sound as several dozen pellets could be produced using the final prototype. However, ensuring sufficient powder flow for the consistent and continuous production of full-sized pellets is the key difficulty in the implementation of this device. As such, further work should be devoted toward understanding and quantifying the flow properties of the CO2 flash freezing powder.
by David M. Lopez.
S.M.
140 p.
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by
copyright. They may be viewed from this source for any purpose, but
reproduction or distribution in any format is prohibited without written
permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Mechanical Engineering.
Development of a pressurized low-temperature tablet press for a carbon dioxide flash frozen ice confection
Thesis
application/pdf
Publication
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<Abstract>This document details the conception, design, and testing of a series of prototype powder-pelletizing devices for use with an ice confection powder produced using a CO2 spray freezing process. The device must function at a temperature of 233 K and at pressures of up to 12 bar(a) and must produce at least 500 pellets for use in consumer testing. Design considerations include stress analysis for critical parts, minimization of powder flow path length, formulation of requirements of thermal management system, implementation of the powder compression methods, examination of various agitation methods, and the testing of the prototype apparatus. Trials proved the concept sound as several dozen pellets could be produced using the final prototype. However, ensuring sufficient powder flow for the consistent and continuous production of full-sized pellets is the key difficulty in the implementation of this device. As such, further work should be devoted toward understanding and quantifying the flow properties of the CO2 flash freezing powder.</Abstract>
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