Analysis of the Passing Period of Tea Leaves in a Continuous Type Tea Steaming Machine

Abstract

The passing period of tea leaves in a continuous type tea steaming machine was surveyed by the activable tracer experiment which is one of the nuclear power technique. In this experiment, gold was used as a activable tracer.
The distribution of the passing period of tea leaves was analyzed statistically by the equation of the gamma distribution.
Among three angles (2.0°, 4.8°, 6.5°) of the steaming drum tested, the mean passing periods of tea leaves became shorter by increasing of the angle However, the variance of the distribution of the passing period showed the smallest value at 4.8° and became larger on the both sides of 4.8°.
The mumber of revolutions of the agitating hand in the steaming drum per minute did not affect the mean passing periods of tea leaves significantly when it was in the range of 320rpm to 560rpm. But the variance of the distribution showed the smallest value under the condition of 460rpm and became larger on the both sides of 460rpm.
The charging rate of tea leaves to the steaming machine influenced on the distribution of the passing period.
When the over or under amount of tea leaves for the optimum amount of the tested machine was charged, the variance of the distributions of the passing periods became larger.