แบบจำลองของการอบแห้งจิ้งหรีดด้วยเครื่องอบแห้งแบบสเปาเต็ดฟลูอิดเบด (DRYING MODEL OF CRICKET DRIED USING THE SPOUTED FLUID BED DRYER)
Abstract
บทความนี้ดำเนินการเพื่อหาแบบจำลองทางคณิตศาสตร์ที่เหมาะสมที่สุดในการทำนายการเปลี่ยนแปลงอัตราส่วนความชื้นของจิ้งหรีดด้วยเครื่องอบแห้งแบบสเปาเต็ดฟลูอิดเบด ซึ่งมีเงื่อนไขการอบแห้ง ดังนี้ อุณหภูมิอบแห้ง 3 ระดับ (65, 75 และ 85oC) ความเร็วลมสเปาต์ 2 ระดับ (14 และ 16 m/s) ความเร็วฟลูอิดไดซ์คงที่เท่ากับ 12 m/s และความสูงเบดเท่ากับ 10 cm พิจารณาแบบจำลองที่เหมาะสมด้วยค่าทางสถิติ ได้แก่ ค่าสัมประสิทธิ์การตัดสินใจ (R2) และค่ารากที่สองของค่าคลาดเคลื่อนกำลังสองเฉลี่ย (RMSE) ผลการศึกษาพบว่า แบบจำลองของ Logarithmic สามารถทำนายคุณลักษณะการอบแห้งของจิ้งหรีดได้เหมาะสมที่สุด เพราะว่าค่า R2 มีค่าสูงสุด และ RMSE มีค่าต่ำที่สุด ค่าสัมประสิทธิ์การแพร่ความชื้นของจิ้งหรีดมีค่าอยู่ระหว่าง 7.63×10-8- 11.4×10-8 m2/s และค่าพลังงานกระตุ้นมีค่าเท่ากับ 17.98 kJ/mol. และ 18.16 kJ/mol. ที่ความเร็วลมสเปาต์ 14 m/s และ 16 m/s ตามลำดับ คำสำคัญ: สเปาต์ฟลูอิดเบด แบบจำลองการอบแห้ง จิ้งหรีด This research aimed to determine the most appropriate mathematical model for predicting the moisture ratio of cricket dried by a Spouted fluid bed dryer. The drying operations were: three levels of drying temperature (65, 75 and 85oC), two levels of spout air velocity (14 and 16 m/s), constant fluidized velocity of 12 m/s, and bed height of 10 cm. Two statistical indices which are the coefficient of determination (R2) and root mean square error (RMSE) were applied for finding the optimum model. The results showed that, the Logarithmic model could represent the drying characteristics of cricket most satisfactorily with the highest R2 values and the lowest RMSE values. The calculation of moisture diffusivity values achieved in the ranged from 7.63x10-8 to 11.4x10-8 m2/s. The activation energies were 17.98 and 18.16 kJ/mol. at spout velocity of 14 and 16 m/s, respectively. Keywords: Spout Fluid Bed, Drying Model, CricketDownloads
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