Unresolved include directive in modules/ROOT/pages/fmod-ma-elements/controlled-reservoir-ma.adoc - include::ROOT:partial$localization-en/blocks/AcausalFoundation.MoistAir.Elements.ControlledReservoir.adoc[]

{blockLibraryPP_blocksPP_FF_PhysicalSS_ModelingFF_FundamentalFF_MoistSS_AirFF_ElementsFF_ControlledSS_ReservoirSS_OO_MALL_PP_label}

Boundary conditions for a humid air network with time-varying pressure, temperature, humidity, and level of impurity gases.

blockType: AcausalFoundation.MoistAir.Elements.ControlledReservoir

Path in the library:

/Physical Modeling/Fundamental/Moist Air/Elements/Controlled Reservoir (MA)

Description

Block {blockLibraryPP_blocksPP_FF_PhysicalSS_ModelingFF_FundamentalFF_MoistSS_AirFF_ElementsFF_ControlledSS_ReservoirSS_OO_MALL_PP_label} sets controlled boundary conditions in the humid air network. The volume of moist air inside the tank is assumed to be infinite. Therefore, the flow is considered quasi-stationary. Moist air leaves the tank at the specified pressure, temperature, specific humidity and mass fraction of impurity gas. The humid air enters the tank with the pressure of the tank, but the temperature, specific humidity and mass fraction of the impurity gas are determined by the humid air network located upstream.

The pressure, temperature, amount of moisture and impurity gas in the tank are set by control signals on the ports P, T, W/Tw and G, respectively. The input signals are limited by their permissible ranges. For the amount of moisture, the permissible range is from zero to saturation or 100% water vapor. For the amount of impurity gas, the permissible range is from zero to either the fraction remaining after water vapor or 100% of the impurity gas.

You can specify humidity as one of the options:

Relative humidity, ;
Specific humidity, ;
Molar fraction of water vapor, ;
Humidity coefficient, ;
Wet thermometer temperature, .

You can specify impurity gas as one of the options:

Mass fraction of impurity gases, ;
Molar fraction of impurity gases, .

The amount of moisture and impurity gases are related to each other as follows:

Where

— pressure;
— universal gas constant.

Indexes , and indicate the properties of dry air, water vapor and residual gases, respectively. Lower index indicates the level of saturation with water vapor.

The unit implicitly calculates the temperature of the wet thermometer using the following equation:

Where

— temperature;
— the temperature of the wet thermometer;
— specific humidity;
— mass fraction of impurity gases;
— specific saturation humidity at the temperature of a wet thermometer;
— specific enthalpy of dry air;
— specific enthalpy of dry air at the temperature of a wet thermometer;
— specific enthalpy of impurity gas;
— specific enthalpy of impurity gases at the temperature of a wet thermometer;
— specific enthalpy of water vapor;
— specific enthalpy of water vapor at the temperature of a wet thermometer;
— specific enthalpy of evaporation of water vapor at the temperature of a wet thermometer.

Ports

Input

# r_d_in — description missing

Details

Description missing

Data types	Description missing
Complex numbers support	Description missing

# T_wb_in — description missing

Details

Description missing

Data types	Description missing
Complex numbers support	Description missing

# trace_gas_in — description missing

Details

Description missing

Data types	Description missing
Complex numbers support	Description missing

# P — pressure, Pa
scalar

Details

An input port that determines the pressure value in the tank.

Data types	`Float64`.
Complex numbers support	No

# moisture_in — description missing

Details

Description missing

Data types	Description missing
Complex numbers support	Description missing

# T — temperature, K
scalar

Details

An input port that determines the temperature value in the tank.

Data types	`Float64`.
Complex numbers support	No

Conserving

# A — humid air port
humid air

Details

Moist air port, corresponds to the tank inlet.

Program usage name

port

Parameters

Main

# Inputs outside valid range — description missing
Limit to valid values | Error

Details

description missing

Values	`Limit to valid values` \| `Error`
Default value	`Error`
Program usage name	`assert_action`
Evaluatable	No

# Reservoir temperature specification — description missing
Atmospheric temperature | Specified temperature

Details

description missing

Values	`Atmospheric temperature` \| `Specified temperature`
Default value	`Atmospheric temperature`
Program usage name	`temperature_type`
Evaluatable	No

# Provide input signal for trace gas — description missing

Details

description missing

Default value	`true (switched on)`
Program usage name	`controlled_trace_gas`
Evaluatable	No

# Reservoir specific humidity — description missing

Details

description missing

Default value	`0.01`
Program usage name	`x_w_const`
Evaluatable	Yes

# Provide input signal for humidity — description missing

Details

description missing

Default value	`true (switched on)`
Program usage name	`controlled_humidity`
Evaluatable	No

# Reservoir mass ratio of water droplets to moist air — description missing

Details

description missing

Default value	`0`
Program usage name	`r_d_const`
Evaluatable	Yes

# Reservoir water vapor mole fraction — description missing

Details

description missing

Default value	`0.01`
Program usage name	`y_w_const`
Evaluatable	Yes

# Reservoir relative humidity — description missing

Details

description missing

Default value	`0.5`
Program usage name	`RH_const`
Evaluatable	Yes

Details

description missing

Units	`K` \| `degC` \| `degF` \| `degR` \| `deltaK` \| `deltadegC` \| `deltadegF` \| `deltadegR`
Default value	`287 K`
Program usage name	`T_wb_const`
Evaluatable	Yes

# Cross-sectional area at port A — area normal to the flow direction at the tank inlet
m^2 | um^2 | mm^2 | cm^2 | km^2 | in^2 | ft^2 | yd^2 | mi^2 | ha | ac

Details

The cross-sectional area of the tank inlet in the direction normal to the wet air flow path.

Units	`m^2` \| `um^2` \| `mm^2` \| `cm^2` \| `km^2` \| `in^2` \| `ft^2` \| `yd^2` \| `mi^2` \| `ha` \| `ac`
Default value	`0.01 m^2`
Program usage name	`port_area`
Evaluatable	Yes

# Reservoir humidity ratio — description missing

Details

description missing

Default value	`0.01`
Program usage name	`HR_const`
Evaluatable	Yes

# Provide input signal for pressure — description missing

Details

description missing

Default value	`true (switched on)`
Program usage name	`controlled_pressure`
Evaluatable	No

# Reservoir humidity specification — moisture measurement method
Relative humidity | Specific humidity | Mole fraction | Humidity ratio | Wet-bulb temperature

Details

Sets the measurement method:

{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_moisture_typePP_optionsPP_RelativeSS_humidity} - W port signal equals relative humidity.
{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_moisture_typePP_optionsPP_SpecificSS_humidity} - The signal on the W port equals the specific humidity.
{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_moisture_typePP_optionsPP_WaterSS_vaporSS_moleSS_fraction} - signal at port W is equal to molar fraction of humidity.
{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_moisture_typePP_optionsPP_HumiditySS_ratio} - the signal on the W port is equal to the moisture content ratio.
{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_moisture_typePP_optionsPP_Wet-bulbSS_temperature} - signal on the W port sets the temperature of the moisture thermometer.

Values	`Relative humidity` \| `Specific humidity` \| `Mole fraction` \| `Humidity ratio` \| `Wet-bulb temperature`
Default value	`Relative humidity`
Program usage name	`moisture_type`
Evaluatable	No

# Relative humidity at saturation — description missing

Details

description missing

Default value	`1`
Program usage name	`RH_ws`
Evaluatable	Yes

# Provide input signal for temperature — description missing

Details

description missing

Default value	`true (switched on)`
Program usage name	`controlled_temperature`
Evaluatable	No

# Reservoir trace gas mole fraction — description missing

Details

description missing

Default value	`0.001`
Program usage name	`y_g_const`
Evaluatable	Yes

# Reservoir pressure — description missing
Pa | uPa | hPa | kPa | MPa | GPa | kgf/m^2 | kgf/cm^2 | kgf/mm^2 | mbar | bar | kbar | atm | ksi | psi | mmHg | inHg

Details

description missing

Units	`Pa` \| `uPa` \| `hPa` \| `kPa` \| `MPa` \| `GPa` \| `kgf/m^2` \| `kgf/cm^2` \| `kgf/mm^2` \| `mbar` \| `bar` \| `kbar` \| `atm` \| `ksi` \| `psi` \| `mmHg` \| `inHg`
Default value	`0.101325 MPa`
Program usage name	`p_const`
Evaluatable	Yes

Details

description missing

Units	`K` \| `degC` \| `degF` \| `degR` \| `deltaK` \| `deltadegC` \| `deltadegF` \| `deltadegR`
Default value	`293.15 K`
Program usage name	`T_const`
Evaluatable	Yes

# Reservoir trace gas specification — method of measuring the amount of impurity gases
Mass fraction | Mole fraction

Details

Sets the method for measuring the composition of impurity gases:

{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_trace_gas_typePP_optionsPP_MassSS_fraction} - the signal on the G port is equal to the mass fraction of impurity gases.
{blockLibraryPP_blockTypesPP_AcausalFoundationBB_PP_MoistAirBB_PP_ElementsBB_PP_ControlledReservoirPP_BasePP_paramsPP_PP_ParametersPP_trace_gas_typePP_optionsPP_MoleSS_fraction} - The signal on the G port is equal to the molar fraction of impurity gases.

Values	`Mass fraction` \| `Mole fraction`
Default value	`Mass fraction`
Program usage name	`trace_gas_type`
Evaluatable	No

# Reservoir pressure specification — description missing
Atmospheric pressure | Specified pressure

Details

description missing

Values	`Atmospheric pressure` \| `Specified pressure`
Default value	`Atmospheric pressure`
Program usage name	`pressure_type`
Evaluatable	No

# Provide input signal for water droplets — description missing

Details

description missing

Default value	`true (switched on)`
Program usage name	`controlled_droplets`
Evaluatable	No

# Reservoir trace gas mass fraction — description missing

Details

description missing

Default value	`0.001`
Program usage name	`x_g_const`
Evaluatable	Yes