Tuesday August 27, 2019 from 13:30 to 15:10
Diagnosis of the freeze-drying process through the ultrasonic technology
Chin-Chi Cheng1, Yen-Hsiang Tseng2, Hong-Ping Cheng1.
1National Taipei University of Technology, Taipei, Taiwan; 2Tai Yiaeh Enterprise Co., Ltd., New Taipei City, Taiwan
In this paper, an ultrasonic transducer (UT) is integrated onto the bottom of a specially designed frozen bottle for the purpose of observing the freeze-drying process of water at varying amounts. The temperatures and visual observations made with a camera are then compared with the corresponding ultrasonic signatures. Among all of the diagnostic tools and technologies available, only ultrasonic and visual records are able to analyze the entire progression of the freeze-drying process, including the water-in, freezing/drying points, the phase change end of water and the cooling/freezing/drying periods. This study demonstrates how an innovative frozen bottle, an integrated ultrasonic sensor and diagnostic methods used to measure and optimize the freeze-drying process of water can save energy.