modelCWbulk

Condensation in the bulk
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Extends from BondLib.Interfaces.TwoPort (Partial model invoking two bondgraphic connectors).

Information

This model computes the condensation in the bulk of the air. It uses the generic condensation model together with an internal modulation computing the conductance of condensation.

An if statement is used to check whether the current humidity is above that of the dew point. If this is not the case, no condensation takes place. 

Parameters:

  vai:     Air volume of Biosphere (default value = 35000 m3)

  hai:     Convection coefficient equation intercept (default value = 39.6 kJ/(h.m2.K))

  pao:     Atmospheric pressure (default value = 87.848 kPa)

References:

  1. American Society of Heating, Refrigerating and Air-Conditioning Engineers (1997), ASHRAE Handbook of Fundamentals.
  2. Air Psychrometrics

Parameters

TypeNameDefaultDescription
Reallambda2501Latent heat of vaporization
Modelica.SIunits.Volumevai35000.0Air volume of Biosphere
Realhai39.6Convection coefficient equation intercept
Realpao87.848Atmospheric pressure

Connectors

TypeNameDefaultDescription
BondLib.Interfaces.BondConBondCon1 (from TwoPort)Left bond graph connector
BondLib.Interfaces.BondConBondCon2 (from TwoPort)Right bond graph connector

Components

TypeNameDefaultDescription
Reale1 (from TwoPort)Bondgraphic primary effort
Realf1 (from TwoPort)Bondgraphic primary flow
Reale2 (from TwoPort)Bondgraphic secondary effort
Realf2 (from TwoPort)Bondgraphic secondary flow
RealcaSpecific heat capacity of moist air
RealG0Specific boundary layer conductance of condensation in the bulk
RealGBoundary layer conductance of condensation
RealG2Bondgraphic conductance
RealsvpSaturation vapor pressure of air
RealhumHumidity ratio of air at saturation
mGScomGSco1