Icon class icon_class far fa-sticky-note icon_class_computed far fa-sticky-note Note kind ASSERTION Keywords SysPhS volumetric heat capacity thermodynamics Related: Webel vs SysPhS-1.1: Annex A.5: Humidifier: Dimensional analysis of VaporPressureCalculationConstraint implies each 1 mL of water is equated with EXACTLY 1 g of produced vapor. Relates to BDD & PD: TemperatureIncrease BDD & PD: EvaporationCalculation Related notes [ISSUE] Webel vs SysPhS-1.1: Annex A.5: Humidifier: Dimensional analysis of VaporPressureCalculationConstraint implies each 1 mL of water is equated with EXACTLY 1 g of produced vapor. [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: In EvaporationCalculation the specificHeat value 1.996 is off by a factor of about 2. It seems to have used the steam (gas) per gram value instead of the liquid water value per gram (or per mL volumetric) value. [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: In the Webel version it will be tentatively assumed we are in fact dealing with a large humidified space like an office building NOT a single "humidified room" - despite the block name HumidifiedRoom in the spec [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: It is assumed that "radiation" is a rate (equivalent to a power). [ASSERTION]{STRONG} Webel vs SysPhS-1.1: Annex A.5: Humidifier: It is assumed that "vapor" is a volume rate corresponding to the rate of consumption OF HEATED LIQUID WATER (from a tank) used to create the vapor. [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: It is assumed that "waterVolume" in TemperatureIncreaseConstraint is a rate litres per second (L/s), so it is named 'waterVolumeRate' in the Webel trail version. [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: It is assumed that 'HumidityBalance::volume = 25,000' and 'VaporPressureCalculation::volume = 25,000' are the same fixed SpaceVolume in cubic metres (m^3). [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: It is NOT assumed that the specification example is completely realistic (but an attempt is made to indeed interpret it as realistic using dimensional analysis and quantity magnitude checks). Related notes (backlinks) [ASSERTION] Webel vs SysPhS-1.1: Annex A.5: Humidifier: In EvaporationCalculation the specificHeat value 1.996 is off by a factor of about 2. It seems to have used the steam (gas) per gram value instead of the liquid water value per gram (or per mL volumetric) value. Related snippets (extracts) Visit also SysPhS-1.1 Visit also (backlinks) Flags
