Engee documentation

Moist Air Properties (MA)

Global humid air properties for units connected to the humid air network.

blockType: AcausalFoundation.MoistAir.Properties

moist air properties (ma)

Path in the library:

/Physical Modeling/Fundamental/Moist Air/Utilities/Moist Air Properties (MA)

Description

The unit Moist Air Properties (MA) defines humid air properties that act as global parameters for all units connected to the network. The humid air mixture consists of dry air, water vapour and an optional impurity gas. By default, carbon dioxide is used as the impurity gas.

The dry air, water vapour and impurity gas are assumed to be semi-ideal gases. Pressure, temperature, and density obey the ideal gas law. The other properties are functions of temperature. You specify them as one-dimensional arrays corresponding to the vector Temperature vector.

A block Moist Air Properties (MA) can be connected to each topologically distinct humid air network in the circuit. If no such block is connected to the circuit, the blocks in the circuit use the humid air properties corresponding to the parameters of the Moist Air Properties (MA) block by default.

Ports

Conserving

# A — connection port
`humid air

Details

The humid air port, connects the unit to the humid air network. You can connect it to any point on the circuit. When you connect a unit Moist Air Properties (MA), Engee automatically identifies the humid air units connected to a particular circuit and transfers the humid air properties to all units in the circuit.

Program usage name

port

Parameters

Dry Air

# Maximum valid pressure — maximum allowable pressure
Pa | uPa | hPa | kPa | MPa | GPa | kgf/m^2 | kgf/cm^2 | kgf/mm^2 | mbar | bar | kbar | atm | ksi | psi | mmHg | inHg

Details

The highest pressure allowed in a wet air network.

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

Inf MPa
Program usage name

p_max
Evaluatable

Yes

# Pressure and temperature outside valid range — description missing
None | Error

Details

description missing

Values

None | Error
Default value

Error
Program usage name

assert_action
Evaluatable

No

# Temperature vector — description missing
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR

Details

description missing

Units

K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Default value

[-56.55, -50.0, -40.0, -30.0, -20.0, -10.0, -5.0, -4.0, -3.0, -2.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0, 100.0, 110.0, 120.0, 130.0, 140.0, 150.0, 160.0, 170.0, 180.0, 190.0, 200.0, 210.0, 220.0, 230.0, 240.0, 250.0, 260.0, 270.0, 280.0, 290.0, 300.0, 310.0, 320.0, 330.0, 340.0, 350.0] degC
Program usage name

T_vector
Evaluatable

Yes

# Minimum valid pressure — lowest permissible pressure
Pa | uPa | hPa | kPa | MPa | GPa | kgf/m^2 | kgf/cm^2 | kgf/mm^2 | mbar | bar | kbar | atm | ksi | psi | mmHg | inHg

Details

The lowest permissible pressure in the humid air network.

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

1 kPa
Program usage name

p_min
Evaluatable

Yes

# Dry air dynamic viscosity vector — description missing
Pa*s | uPa*s | cP | P | N*s/m^2 | kgf*s/m^2 | reyn

Details

description missing

Units

Pa*s | uPa*s | cP | P | N*s/m^2 | kgf*s/m^2 | reyn
Default value

[14.2568884161326, 14.6140128551699, 15.151727785151, 15.6806860927178, 16.201235181264, 16.7137043838401, 16.9670072430524, 17.017438132541, 17.0677931537044, 17.1180726001803, 17.1682767640582, 17.2184059358881, 17.2684604046898, 17.318440457962, 17.3683463816913, 17.4181784603614, 17.467936976962, 17.7156359301048, 18.2056752419787, 18.6887904184394, 19.1652345249932, 19.6352479488881, 20.099059157425, 20.5568854116507, 21.008933436444, 21.4554000485251, 21.8964727442509, 22.3323302492491, 22.7631430320408, 23.1890737838183, 23.6102778665211, 24.0269037312887, 24.4390933092858, 24.8469823767971, 25.2507008963847, 25.6503733357905, 26.0461189661617, 26.438052141067, 26.8262825576728, 27.210915501349, 27.5920520748824, 27.969789413389, 28.3442208859359, 28.7154362848061, 29.0835220032714, 29.4485612026716, 29.8106339695395, 30.169817463453, 30.5261860562487, 30.8798114631771, 31.2307628665438, 31.5791070323335] uPa*s
Program usage name

mu_a_vector
Evaluatable

Yes

# Maximum valid temperature — highest permissible temperature
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR

Details

The highest temperature allowed in a humid air network.

Units

K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Default value

350 degC
Program usage name

T_max
Evaluatable

Yes

# Atmospheric 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_atm
Evaluatable

Yes

# Minimum valid temperature — lowest permissible temperature
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR

Details

The lowest temperature allowed in a humid air network.

Units

K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Default value

-56.55 degC
Program usage name

T_min
Evaluatable

Yes

# Atmospheric temperature — description missing
K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR

Details

description missing

Units

K | degC | degF | degR | deltaK | deltadegC | deltadegF | deltadegR
Default value

20 degC
Program usage name

T_atm
Evaluatable

Yes

# Dry air specific enthalpy vector — description missing
J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)

Details

description missing

Units

J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)
Default value

[342.414066793634, 349.003411914139, 359.061417476782, 369.117728274935, 379.173188407993, 389.228602960013, 394.256538873206, 395.262156814682, 396.26778682262, 397.27342967397, 398.279086145689, 399.284757014822, 400.290443058569, 401.296145054364, 402.301863779931, 403.307600013352, 404.313354533128, 409.342428711098, 419.402397945314, 429.465451846544, 439.532387826623, 449.604014793745, 459.68115297076, 469.764632657687, 479.855292205971, 489.953975419749, 500.06152856014, 510.178797098051, 520.306622336267, 530.445838000969, 540.597266885076, 550.761717610289, 560.939981561004, 571.132830031086, 581.341011613777, 591.565249855533, 601.806241186423, 612.064653132654, 622.341122810862, 632.636255698901, 642.95062467384, 653.284769304793, 663.639195385783, 674.014374692179, 684.410744943084, 694.828709951456, 705.268639943519, 715.730872029167, 726.215710805484, 736.723429076127, 747.254268670154, 757.808441344776] kJ/kg
Program usage name

h_a_vector
Evaluatable

Yes

# Dry air thermal conductivity vector — description missing
W/(m*K) | mW/(m*K) | Btu_IT/(hr*ft*deltadegR)

Details

description missing

Units

W/(m*K) | mW/(m*K) | Btu_IT/(hr*ft*deltadegR)
Default value

[19.8808491891482, 20.4162457047568, 21.2248745869044, 22.0232455041378, 22.8117316528767, 23.59069155438, 23.9767077285082, 24.0536401764626, 24.130482853517, 24.2072360894785, 24.2839002127411, 24.3604755502875, 24.4369624276914, 24.5133611691197, 24.5896720973349, 24.6658955336975, 24.7420317981691, 25.1214166432482, 25.8738284673185, 26.6180151791963, 27.3542675863918, 28.0828636150405, 28.8040688184917, 29.5181369069754, 30.2253102842368, 30.9258205811167, 31.6198891790667, 32.307727718801, 32.989538590917, 33.6655154065126, 34.3358434467079, 35.0007000906151, 35.6602552217624, 36.314671613305, 36.9641052925838, 37.6087058857479, 38.2486169432557, 38.8839762471259, 39.5149161008418, 40.1415636028127, 40.7640409042923, 41.3824654526272, 41.9969502206863, 42.6076039232795, 43.2145312213471, 43.8178329146528, 44.4176061236819, 45.0139444614019, 45.6069381955058, 46.1966744017242, 46.7832371087507, 47.3667074352967] mW/(m*K)
Program usage name

k_a_vector
Evaluatable

Yes

# Dry air specific gas constant — the ratio of the universal gas constant to the molar mass of dry air
J/(kg*K) | kJ/(kg*K) | cal/(kg*K) | kcal/(kg*K) | cal/(g*K) | kcal/(g*K) | Btu_IT/(lbm*deltadegR)

Details

Ratio of the universal gas constant to the molar mass of dry air.

Units

J/(kg*K) | kJ/(kg*K) | cal/(kg*K) | kcal/(kg*K) | cal/(g*K) | kcal/(g*K) | Btu_IT/(lbm*deltadegR)
Default value

287.047 J/(kg*K)
Program usage name

R_a
Evaluatable

Yes

Water Vapor

# Water vapor specific enthalpy vector — description missing
J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)

Details

description missing

Units

J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)
Default value

[2396.53078650168, 2408.65722023252, 2427.16766028467, 2445.66624034104, 2464.1379798878, 2482.5594701893, 2491.7412703989, 2493.57467660537, 2495.40699233755, 2497.23816944599, 2499.06815833272, 2500.89261781717, 2502.73123919979, 2504.56496564907, 2506.39800457704, 2508.23033644628, 2510.06194120626, 2519.20831890725, 2537.43340437276, 2555.54520329515, 2573.51032237465, 2591.28888786817, 2608.83487221908, 2626.09640083333, 2643.01588134754, 2659.53001419864, 2675.5827869577, 2696.18462565746, 2716.49989554204, 2736.6235211014, 2756.61216047677, 2776.50561774616, 2796.33378923373, 2816.11979584021, 2835.88181424959, 2855.6343057571, 2875.38889328914, 2895.15500578618, 2914.94035966265, 2934.75132291939, 2954.59319332093, 2974.47041287496, 2994.38673461102, 3014.34535330297, 3034.34900869544, 3054.40006758361, 3074.50058949656, 3094.65237956705, 3114.85703131193, 3135.11596141057, 3155.43043809331, 3175.80160439414] kJ/kg
Program usage name

h_w_vector
Evaluatable

Yes

# Enable entrained water droplets — description missing

Details

description missing

Default value

false (switched off)
Program usage name

enable_droplets
Evaluatable

No

# Water vapor dynamic viscosity vector — description missing
Pa*s | uPa*s | cP | P | N*s/m^2 | kgf*s/m^2 | reyn

Details

description missing

Units

Pa*s | uPa*s | cP | P | N*s/m^2 | kgf*s/m^2 | reyn
Default value

[6.9886414857741, 7.21462000349698, 7.55962537406626, 7.90463074463554, 8.24963611520482, 8.5946414857741, 8.76714417105874, 8.80164470811567, 8.8361452451726, 8.87064578222952, 8.90514631928645, 8.93964685634338, 8.97414739340031, 9.00294911497154, 9.0318980288863, 9.06099135942002, 9.09022638806001, 9.23843559844524, 9.5440595677542, 9.86015858692705, 10.1848429274122, 10.5164578096049, 10.8535319382781, 11.1947482575333, 11.5389294976352, 11.8850331780701, 12.2322493177351, 12.6188533568459, 13.0082793358938, 13.4003380262893, 13.7948421428098, 14.1916095618232, 14.590464747099, 14.9912394314964, 15.3937729006119, 15.7979120385447, 16.203511226482, 16.610432150303, 17.0185435533718, 17.4277209582061, 17.8378463726577, 18.2488079909412, 18.6604998963166, 19.0728217698535, 19.485678608085, 19.8989804512625, 20.3126421231677, 20.7265829829225, 21.1407266888906, 21.5550009745266, 21.969337435876, 22.3836713303269] uPa*s
Program usage name

mu_w_vector
Evaluatable

Yes

# Water vapor diffusivity in air — smoothing factor for reverse flows
m^2/s | mm^2/s | in^2/s | ft^2/s | St | cSt | newt

Details

Coefficient for diffusive water vapour flux in a moist air mixture due to differences in water vapour concentration. When the mixture flow is reversed, the mass flow rate of water vapour at the ports smooths from an upstream value to a downstream value based on the diffusion coefficient.

Units

m^2/s | mm^2/s | in^2/s | ft^2/s | St | cSt | newt
Default value

25 mm^2/s
Program usage name

D_w
Evaluatable

Yes

# Water specific enthalpy of vaporization vector — description missing
J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)

Details

description missing

Units

J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)
Default value

[2836.88241275372, 2837.81392500514, 2838.63937175807, 2838.7309929628, 2838.06905313927, 2836.62597341095, 2835.60023952573, 2835.37006381376, 2835.13143158077, 2834.88429145066, 2834.62859062897, 2500.93420564316, 2498.55452890293, 2496.17317793437, 2493.7941260618, 2491.41713708944, 2489.04199020767, 2477.18706302224, 2453.51925941961, 2429.81122987564, 2405.97728678685, 2381.94712654051, 2357.65452030374, 2333.03120800924, 2308.00352809267, 2282.49062771796, 2256.40372152657, 2229.64615315163, 2202.11407337172, 2173.6974807639, 2144.28128268553, 2113.74600964951, 2081.9678834089, 2048.81807129851, 2014.16109962579, 1977.85249331179, 1939.73572816654, 1899.63852389863, 1857.36838273035, 1812.70710332357, 1765.4037880462, 1715.16561416478, 1661.64526339623, 1604.4232249434, 1542.98206457018, 1476.66790089115, 1404.63083498414, 1325.72875296442, 1238.36212284382, 1140.16281350074, 1027.31658328826, 892.746804215825] kJ/kg
Program usage name

h_w_vaporization_vector
Evaluatable

Yes

# Water vapor specific gas constant — universal gas constant divided by the molar mass of water vapour
J/(kg*K) | kJ/(kg*K) | cal/(kg*K) | kcal/(kg*K) | cal/(g*K) | kcal/(g*K) | Btu_IT/(lbm*deltadegR)

Details

The universal gas constant divided by the molar mass of water vapour.

Units

J/(kg*K) | kJ/(kg*K) | cal/(kg*K) | kcal/(kg*K) | cal/(g*K) | kcal/(g*K) | Btu_IT/(lbm*deltadegR)
Default value

461.523 J/(kg*K)
Program usage name

R_w
Evaluatable

Yes

# Water vapor thermal conductivity vector — description missing
W/(m*K) | mW/(m*K) | Btu_IT/(hr*ft*deltadegR)

Details

description missing

Units

W/(m*K) | mW/(m*K) | Btu_IT/(hr*ft*deltadegR)
Default value

[12.4916816538045, 12.9847788176262, 13.737598915064, 14.4904190125018, 15.2432391099396, 15.9960592073774, 16.3724692560963, 16.4477512658401, 16.5230332755839, 16.5983152853277, 16.6735972950715, 16.7488793048152, 16.824161314559, 16.8886088206517, 16.9532779906513, 17.0181691764255, 17.083282769915, 17.4122036181723, 18.0870861656185, 18.7855813517187, 19.5093466408385, 20.2607864040347, 21.0430876297671, 21.8602068151121, 22.7168164077153, 23.6182141540994, 24.5698636875305, 25.4024944426483, 26.2458938647479, 27.1009155051916, 27.968142896353, 28.8479507975112, 29.7405485790829, 30.646029672269, 31.5643932662527, 32.4955693285114, 33.4394360046859, 34.3958329885356, 35.3645718140131, 36.3454437886179, 37.3382261129791, 38.3426866012072, 39.3585873185985, 40.3856873794121, 41.4237450915028, 42.4725195920623, 43.5317720862424, 44.6012667755489, 45.6807715437344, 46.7700584531355, 47.8689040929333, 48.9770898119082] mW/(m*K)
Program usage name

k_w_vector
Evaluatable

Yes

# Water vapor saturation pressure vector — 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

[1.71168953425982e-6, 3.93770601979424e-6, 1.28411717710344e-5, 3.80051394873809e-5, 0.00010323902900209, 0.000259873810798063, 0.000401741022116384, 0.000437454836117844, 0.000476040820618202, 0.000517704666185737, 0.000562664883741207, 0.000611212677444345, 0.000657085634113763, 0.000705985593917791, 0.00075808051438111, 0.000813548355379396, 0.000872575113841924, 0.00122819910164487, 0.00233931836947519, 0.00424697076171126, 0.00738493802968097, 0.012351945812707, 0.0199464343236764, 0.0312009300307261, 0.0474144740241604, 0.0701817658485933, 0.101417996663294, 0.143378712947169, 0.198674420476403, 0.270279976781692, 0.361539099388177, 0.476164537971214, 0.618234621423587, 0.792187006980199, 1.00281053608169, 1.25523615516845, 1.55492790046272, 1.90767499353199, 2.31958617020155, 2.79708749692822, 3.34692514426746, 3.97617493064794, 4.69226099229504, 5.50298678300951, 6.41658290952841, 7.44177834442093, 8.58790494083256, 9.86505121117553, 11.284292927457, 12.8580516000122, 14.6006773719404, 16.5294151389953] MPa
Program usage name

p_ws_vector
Evaluatable

Yes

Trace Gas

# Trace gas thermal conductivity vector — description missing
W/(m*K) | mW/(m*K) | Btu_IT/(hr*ft*deltadegR)

Details

description missing

Units

W/(m*K) | mW/(m*K) | Btu_IT/(hr*ft*deltadegR)
Default value

[10.7373095949238, 11.1772934980884, 11.862915506018, 12.5638333280734, 13.2785475592421, 14.005722199619, 14.3736017704762, 14.4475028211958, 14.5215096973787, 14.5956213250986, 14.6698366403414, 14.7441545888563, 14.8185741260114, 14.8930942166532, 14.9677138349692, 15.0424319643548, 15.1172475972825, 15.4927536712633, 16.2505237772467, 17.0165521650722, 17.7899991951805, 18.5700903932503, 19.3561099002839, 20.1473949639617, 20.9433312278214, 21.7433486448307, 22.5469178892132, 23.3535471729555, 24.1627793965491, 24.9741895799701, 25.7873825314493, 26.6019907190427, 27.4176723115859, 28.2341093347412, 29.0510055857402, 29.8680879651392, 30.6851034165693, 31.5018116707882, 32.3179924018673, 33.1334410491403, 33.9479677779769, 34.7613965127281, 35.5735640361829, 36.3843191504339, 37.1935218945334, 38.0010428147395, 38.80676228352, 39.6105698638057, 40.412363715274, 41.2120500397018, 42.0095425626597, 42.8047620490288] mW/(m*K)
Program usage name

k_g_vector
Evaluatable

Yes

# Trace gas dynamic viscosity vector — description missing
Pa*s | uPa*s | cP | P | N*s/m^2 | kgf*s/m^2 | reyn

Details

description missing

Units

Pa*s | uPa*s | cP | P | N*s/m^2 | kgf*s/m^2 | reyn
Default value

[10.9386626034033, 11.2618160869372, 11.7542862475187, 12.2454955799777, 12.7352208796158, 13.2232325321233, 13.4665248390743, 13.5151226761166, 13.5636997995993, 13.6122559954699, 13.6607910510226, 13.709304754931, 13.757796897279, 13.8062672695897, 13.8547156648526, 13.9031418775498, 13.9515457036801, 14.1932220047332, 14.6747828595747, 15.153802214283, 15.6301123398299, 16.1035631756244, 16.574022106427, 17.0413733976215, 17.5055174102327, 17.9663696812767, 18.4238599299346, 18.8779310322956, 19.3285379947687, 19.7756469471288, 20.2192341695255, 20.6592851629269, 21.0957937689132, 21.5287613421341, 21.9581959768344, 22.3841117874779, 22.8065282425078, 23.2254695495877, 23.6409640901974, 24.0530439011453, 24.4617442003854, 24.8671029544344, 25.269160484669, 25.6679591098169, 26.0635428220247, 26.4559569939835, 26.8452481147025, 27.2314635516519, 27.6146513371198, 27.9948599767665, 28.3721382784874, 28.74653519983] uPa*s
Program usage name

mu_g_vector
Evaluatable

Yes

# Trace gas diffusivity in air — smoothing factor for reverse flows
m^2/s | mm^2/s | in^2/s | ft^2/s | St | cSt | newt

Details

A coefficient for the diffusive flow of impurity gases in a moist air mixture due to differences in impurity gas concentration. When reversing the mixture flow, the mass flow rate of the impurity gas at the ports is smooth from an upstream value to a downstream value based on the diffusion coefficient.

Dependencies

To use this parameter, set the parameters Trace gas model to the value of Track mass fraction only or Track mass fraction and gas properties.

Units

m^2/s | mm^2/s | in^2/s | ft^2/s | St | cSt | newt
Default value

16 mm^2/s
Program usage name

D_g
Evaluatable

Yes

# Trace gas model — method of modelling impurity gases in an air mixture
None | Track mass fraction only | Track mass fraction and gas properties

Details

Select how the unit models the amount of impurity gases in the air mixture:

  • None - no impurity gas is present. A humid air mixture consists of only dry air and water vapour. Any non-zero impurity gas level values in the parameters and target variables of blocks connected to the circuit are ignored. All connections to impurity gas source blocks in the model are also ignored. Thus, you do not need to modify the model depending on your choice of impurity gas modelling.

  • Track mass fraction only - The level of impurity gases may be non-zero and may change during the modelling process. However, it is assumed that the amount of impurity gases is small enough to have negligible effect on the liquid properties of the moist air mixture.

  • Track mass fraction and gas properties - The level of impurity gas may be non-zero and may change during the simulation. The liquid properties of a moist air mixture depend on the amount of impurity gas in the mixture.

Values

None | Track mass fraction only | Track mass fraction and gas properties
Default value

None
Program usage name

trace_gas_model
Evaluatable

No

# Trace gas specific enthalpy vector — description missing
J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)

Details

description missing

Units

J/kg | kJ/kg | cal/kg | kcal/kg | mm^2/s^2 | cm^2/s^2 | m^2/s^2 | km^2/s^2 | km^2/hr^2 | in^2/s^2 | ft^2/s^2 | ft^2/min^2 | mi^2/s^2 | mi^2/hr^2 | Pa/(kg/m^3) | psi/(lbm/ft^3) | bar/(kg/m^3)
Default value

[439.555216276024, 444.670268214299, 452.538618857965, 460.487124266174, 468.522588773143, 476.64941595933, 480.747985385885, 481.570543185868, 482.394052396612, 483.218514286302, 484.043930026094, 484.87030069324, 485.697627274149, 486.525910667382, 487.355151686572, 488.185351063277, 489.016509449741, 493.186704132078, 501.599194941473, 510.107689945701, 518.711611059603, 527.410026767716, 536.20176474847, 545.085474167968, 554.059675464379, 563.122805439004, 572.273250917104, 581.509372969931, 590.829525041787, 600.232066635428, 609.715373504524, 619.277845094572, 628.91790983254, 638.634028741375, 648.424697754692, 658.288449028076, 668.22385148184, 678.229510761734, 688.30406876583, 698.446202855373, 708.654624842952, 718.928079831753, 729.265344963773, 739.665228122078, 750.126566621791, 760.648225916092, 771.229098336723, 781.86810188302, 792.564179069104, 803.316295835373, 814.123440527678, 824.984622945405] kJ/kg
Program usage name

h_g_vector
Evaluatable

Yes

# Trace gas specific gas constant — the ratio of the universal gas constant to the molar mass of the impurity gas
J/(kg*K) | kJ/(kg*K) | cal/(kg*K) | kcal/(kg*K) | cal/(g*K) | kcal/(g*K) | Btu_IT/(lbm*deltadegR)

Details

The ratio of the universal gas constant to the molar mass of the impurity gas.

Dependencies

To use this parameter, set the parameters Trace gas model to the value of Track mass fraction only or Track mass fraction and gas properties.

Units

J/(kg*K) | kJ/(kg*K) | cal/(kg*K) | kcal/(kg*K) | cal/(g*K) | kcal/(g*K) | Btu_IT/(lbm*deltadegR)
Default value

188.923 J/(kg*K)
Program usage name

R_g
Evaluatable

Yes

Examples