การศึกษาลักษณะการไหลและการทำแห้งกุ้งในเจตสเปาท์เตคเบด

Study of Hydrodynamics and Drying Characteristics of a Jet Spouted Bed of Shrimp

Name: รุ่งทิพย์ ตปนียศิลป์

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Rungtip Tapaneyasin

keyword: Dried Shrimp

; Jet Spouted Bed

Abstract: Dried shrimp is one of the most important exported marine products of Thailand. The price of driedshrimp depends largely on its quality viz. color, dryness and size. The objective of this research wastherefore to investigate the feasibility of using a jet spouted bed dryer to increase the efficiency ofthe shrimp drying process. In addition, the effects of various operating parameters, i.e., size ofshrimp, bed height and nozzle diameter, on the bed hydrodynamic characteristics viz. minimumspouting velocity as well as maximum and steady spouting pressure drops were studiedexperimentally. Experiments were also performed to study the effects of various parameters, i.e.,size of shrimp and temperature of inlet drying air, on the drying kinetics and various qualityattributes of dried shrimp viz. shrinkage, rehydration, texture and color.Based on the hydrodynamic study, it was observed that all variables that represented the bedhydrodynamic behavior decreased as the shrimp moisture content decreased. It was also found thatthe minimum spouting velocity and steady spouting pressure drop were affected mostly by thenozzle diameter while the maximum pressure drop was affected mostly by the static bed height.This effect of moisture content on the various hydrodynamic quantities has also been incorporatedin the newly developed empirical correlations that enable the prediction of these quantities.Furthermore, the effects of various operating parameters viz. size of shrimp and inlet drying airtemperature on the drying kinetics and quality of shrimp were also investigated. It was found thatthe use of a constant inlet air temperature of 100o C yielded the dried shrimp of best quality in termsof low percentage of shrinkage, high percentage of rehydration, low maximum shear force and highvalue of redness. A simple mathematical model that enables prediction of the drying behavior ofshrimp in a jet spouted bed dryer has also been developed. Although the model cannot predict wellthe drying results of some cases, it forms the basis for the development of a more sophisticatedmodel in the future. Results obtained from this study can be used as a guideline to scale up the driedshrimp production process to an industrial scale.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: ผศ.ดร. อัมพวัน ตั๊นสกุล

Role: อาจารย์ที่ปรึกษา

Created: 2546

Issued: 2005-08-04

Modified: 2006-05-10

วิทยานิพนธ์/Thesis

ISBN: 9744563486

CallNumber: FDE177

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: วิศวกรรมอาหาร

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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3	FDE177ab.txt	2.65 KB	16	2018-05-13 02:52:39

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