乾湿計の原理による沸点温度以上での湿度測定方法

(精度検証のための湿度発生装置の開発)

抄録

Superheated steam/high-humidity air over boiling point temperature is used as a heating media for food heating machineries, such as steamers and ovens. However, there is no suitable humidity measuring equipment under high temperature and humidity air. Therefore, we have developed a measuring device using porous ceramics based on the principle of the psychrometer. In this study, we have developed a humidity generator of calibrate the humidity measuring device. Standard humidity is generated by mixing of hot air and superheated steam. We have verified the accuracy by comparing values in steam mole fraction measured by the calibrated dew-point instrument and by the flow meters as well as by the psycrometer using porous ceramics. We have analyzed uncertainty of the generated humidity to evaluate the reliability.