Testing the performance of drying herbs by heat exchange method Shell and tube model

Abstract

This research was to test the performance of drying herbs using the heat exchange method. Shell and tube type The objective is to study the variables of time and temperature suitable for drying herbs in order to obtain herbs that have moisture according to the standards for dried herbs, MCU 480/2547, as follows.

          A study of the appropriate drying temperatures: 45, 55, and 65   and drying air speeds of 1, 2, and 3 m/s, averaged for all 3 times, found that the herbs had an initial moisture content of 39%. It was found that the drying rate Using the fastest average drying temperature of 65 , the average drying time was 8 hours. It was found that the herbs had an average final moisture content of 12%, the average drying temperature was 55, and the average drying time was 9 hours. It was found that the herbs had an average final moisture content of 12%, and the average drying temperature was 45 with an average drying time of 12 hours. It was found that the herbs had an average final moisture content of 12%.

          The results of the study of wind speed, temperature and optimum time for drying herbs are The average air speed was 2 m/s, the temperature was 45 , and the average drying time was 12 hours, resulting in herbs with the same uniform drying rate. and maintains color and odor according to dry herb standards