Silicon dew point hygrometer model

The paper presents a new complex model of silicon dew point hygrometer. Construction of fabricated hygrometer is briefly shown. Next the set of model equations is presented. The model describes: behavior of water vapor contained in measured gas (saturated vapor partial pressure, sub cooled water phenomenon), water mass transport (condensation and evaporation processes), heat transport across measurement head, silicon dew detector and regulator characteristics. The numerical dew point hygrometer model realized in SIMULINK environment is presented. Finally, comparison of measured data and model responses is discussed.