Presentation on theme: "Tutorial for Psyc0226 Wei Fang, Ph.D., Professor"— Presentation transcript:
1Tutorial for Psyc0226 Wei Fang, Ph.D., Professor Dept. of Bio-Industrial Mechatronics EngineeringNational Taiwan UniversitySoftware last updated: 2002/02/26Tutorial last updated: 2003/11/28
2Capability of Psyc0226 Allow alteration on atmospheric pressure Provide handy PsyTablesTotally 11 tables are availableProvide PsyChartsState calculation: besides AtmP, values of 2 independent states are required to calculate othersProcess calculation: find differences between 2 statesMore process calculation:Evaporative coolingVapor pressure deficit on leaf
3More message of the selected cell Abbreviations of thermodynamic properties of moist air used in Psyc0226Tdb: dry bulb Temp.RH : relative humidityTwb: Wet bulb Temp.Tdp: dew point Temp.AH : absolute humiditySV : specific volumeHfg: SaturatedDOS: degree of SaturationPws: saturated vapor pressurePw: vapor pressureMore message of the selected cell
15VPD’=Pw@Twb – Pw@Tdb AHD’=Sat.AH@Twb – Sat.AH@Tdp VPD’/AHD’ of air
16Psycharts Evaporative cooling process calculation Besides atmospheric pressure, values of 2 independent states are required to derive othersfind differences between 2 statesEvaporative cooling process calculationVapor pressure deficit on leaf
21Use mouse to define 2 states To define 2nd state, change from ‘Inactive’ to ‘Active’ first.Click in the Psychart window at the selected state or click on the crosshair region to move along constant lines or curves.Click on ‘Cal.’ to calculate the difference.
22Move along prefix lines or Curves Constant TwbConstant TdbConstant RHConstant Tdp, Pw, AHConstant Tdp, Pw, AHConstant RHConstant TdbConstant Twb
33Labels in Psychart window can be hidden by de-select the Unit label icon
34The state user defined in the psychart window using left button of the mouse will be placed in the center of the psychart window if the Centralize icon was selected. This option is set inactive by default.
35Enjoy playing with Digital Psychart Please send us information regarding found bugs.Mail to :