Moist Air Properties (MA)

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

The ratio of the universal gas constant to the molar mass of dry air.

A vector of temperature values used to find other properties as a function of temperature. The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

The value by default is [-56.55, -50 : 10 : -10, -5 : 1 : 5, 10 : 10 : 350] °C.

A vector of dry air specific enthalpy values used for a one-dimensional table search based on the corresponding temperature value. The size of the vector should be the same as the size of the vector of temperature values .

By default value: [342.416126230579, 349.005511058471, 359.063577249119, 369.119948684177, 379.175469465129, 389.230944678417, 394.258910928084, 395.264534937366, 396.27017101329, 397.275819932805, 398.281482472874, 399.287159410541, 400. 292851523015, 401.298559587728, 402.304284382408, 403.310026685143, 404.315787274435, 409.34489180313, 419.404921755863, 429.468036401264, 439.535033154839, 449.606720928652, 459.683919949603, 469.767460521911, 479.858181001348, 489. 956925196484, 500.064539372946, 510.181869006204, 520.309755403634, 530.449032296018, 540.60052248087, 550.765034584465, 560.943359995745, 571.136270013102, 581.344513234296, 591.568813210327, 601.809866375885, 612.068340261954, 622.344871990218, 632. 640067043998, 642.95449830646, 653.288705353699, 663.643193987949, 674.018435994423, 684.414869104228, 694.832897145098, 705.272890361557, 715.735185886199, 726.220088344236, 736.727870574087, 747.258774447567, 757.813011774199] kJ/kg.

A vector of dry air dynamic viscosity values used for a one-dimensional table search based on the corresponding temperature value. The size of the vector must be the same as the size of the vector of temperature values .

By default value: [14.2568883320012, 14.6140127728333, 15.1517277055779, 15.6806860159119, 16.2012351072083, 16.7137043125028, 16.9670071730589, 17.017438062815, 17.0677930842452, 17.1180725309876, 17.1682766951315, 17.2184058672268, 17.2684603362935, 17.3184403898301, 17.3683463138234, 17.4181783927569, 17.4679369096204, 17.7156358640698, 18.2056751785154, 18.68879035749, 19.1652344664982, 19.6352478927873, 20.099059103658, 20.5568853601578, 21.0089333871663, 21. 4554000014051, 21.8964726992323, 22.3323302062775, 22.7631429910631, 23.1890737447833, 23.6102778293792, 24.0269036959922, 24.4390932757886, 24.8469823450548, 25.2507008663546, 25.6503733074314, 26.0461189394339, 26.4380521159325, 26.8262825340948, 27.2109154792923, 27.5920520543128, 27.969789394274, 28.3442208682439, 28.7154362685068, 29.0835219883356, 29.4485611890712, 29.8106339572472, 30.1698174524429, 30.5261860464955, 30.8798114546565, 31.2307628592324, 31.5791070262086] s*uPa.

A vector of dry air thermal conductivity values to be used for a one-dimensional table search by the corresponding temperature value. The size of the vector must be the same as the size of the vector of temperature values .

By default value: [19.8808489374933, 20.4162454629695, 21.2248743590758, 22.0232452890903, 22.8117314495857, 23.5906913619588, 23.9767075412237, 24.053639990175, 24.1304826682191, 24.2072359051629, 24.2839000294007, 24.3604753679152, 24.4369622462801, 24.5133609886625, 24.5896719178249, 24.6658953551279, 24.7420316205333, 25.1214164701832, 25.8738283029331, 26.6180150229276, 27.3542674377332, 28.0828634735341, 28.8040686837224, 29.5181367785657, 30.2253101618423, 30. 9258204644224, 31.6198890677835, 32.3077276126633, 32.9895384896798, 33.6655153099498, 34.33584335461, 35.0007000027879, 35.6602551380254, 36.3146715334901, 36.9641052165342, 37.6087058133173, 38.248616874307, 38.8839761815308, 39.5149160384798, 40.1415635435708, 40.7640408480637, 41.3824653993118, 41.9969501701893, 42.6076038755117, 43.2145311762238, 43.8178328720941, 44.4176060836121, 45.013944423749, 45.6069381602018, 46.1966743687041, 46.783237077953, 47.3667074066625] mW/(K*m).

The lowest valid pressure in a wet air network.

The highest pressure allowed in a wet air network.

The lowest temperature allowed in a humid air network.

The highest temperature allowed in a humid air network.

Absolute ambient pressure.

Absolute ambient temperature.

Universal gas constant divided by the molar mass of water vapour.

A vector of water vapour saturation values as a function of as a function of temperature for use in one-dimensional tables.

Humid air becomes saturated when the partial pressure of water vapour equals the saturation pressure of water vapour. Therefore, condensation can occur. The size of the vector should be the same as the size of the vector of temperature values .

The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

By default value: [1.71168953425982e-06, 3.93770601979424e-06, 1.28411717710344e-05, 3.80051394873809e-05, .00010323902900209, .000259873810798063, .000401741022116384, .000437454836117844, .000476040820618202, .000517704666185737, .000562664883741207, .000611212677444345, .000657088049117899, .000705987905898279, .000758082381149132, .000813549384183233, .000872574861129522, .00122818386934022, .0023392147667769, .00424668834054807, .00738442748706953, .0123512704340234, .0199458019246787, . 0312006356960619, .0474147199263783, .0701823607447713, .10141797792131, .143375967241115, .198665399739302, .270259606559999, .361500961984849, .476101381081492, .618139196722055, .792053183687694, 1.0026345688121, 1.25501792086105, 1.55467186826983, 1.90739066433297, 2.31928772772542, 2.79679245576864, 3.34665187151016, 3.97593907083533, 4.69207105435535, 5.5028394740883, 6.41645928168037, 7.4416425436169, 8.58770832955728, 9.86474556030261, 11.2838558865497, 12.8575218898034, 14.6001810568052, 16.5291642526045] MPa.

A vector of values of the difference between the specific enthalpy of saturated water vapour and the specific enthalpy of saturated liquid water as a function of temperature, used for a one-dimensional table search. The size of the vector should be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

The value by default is [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. 55329907119, 2496.17495082036, 2493.79885912205, 2491.42474723191, 2489.05236104642, 2477.20875029194, 2453.54955988604, 2429.83856603313, 2406.00136954922, 2381.97406342174, 2357.69101156389, 2333.08088387814, 2308.06565480412, 2282. 56034405021, 2256.47287422313, 2229.70428017508, 2202.14968030993, 2173.69998896199, 2144.24368406447, 2113.66758247452, 2081.85585110571, 2048.68725710494, 2014.03141249899, 1977.7449923284, 1939.66849592886, 1899.62342931686, 1857. 40930169838, 1812.79975416601, 1765.53721731251, 1715.32525772152, 1661.81700477787, 1604.59703745016, 1543.1534616334, 1476.83692476464, 1404.80240352424, 1325.92091736114, 1238.61667822208, 1140.5102987018, 1027.62017777647, 892.733785613825] kJ/kg.

A vector of water vapour specific enthalpy values used for one-dimensional table lookup based on the corresponding temperature value. The size of the vector should be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

The value by default is [2396.55944251649, 2408.68643343608, 2427.1988031141, 2445.702165897, 2464.18429108356, 2482.62529466839, 2491.82135326629, 2493.6580151792, 2495.49372578218, 2497.32843835745, 2499.16210446923, 2500.99462758899, 2502. 83092214066, 2504.6665223621, 2506.50140563013, 2508.335548891, 2510.16892865793, 2519.32352241995, 2537.56068088674, 2555.67742615292, 2573.6403223998, 2591.4109179101, 2608.9455037701, 2626.19492016262, 2643.10444358428, 2659. 61377634497, 2675.58278696023, 2696.1846256545, 2716.49989553741, 2736.6235210957, 2756.61216047011, 2776.50561773853, 2796.33378922508, 2816.11979583049, 2835.88181423877, 2855.63430574511, 2875.38889327595, 2895.15500577172, 2914.94035964689, 2934. 75132290228, 2954.59319330244, 2974.47041285505, 2994.38673458964, 3014.34535328009, 3034.34900867103, 3054.40006755764, 3074.50058946898, 3094.65237953784, 3114.85703128106, 3135.11596137801, 3155.43043805905, 3175.80160435813] kJ/kg.

A vector of water vapour dynamic viscosity values used for a one-dimensional table search based on the corresponding temperature value. The size of the vector must be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

By default value: [6.81365662228272, 7.04953750742707, 7.40970098298307, 7.76991278093907, 8.13017290129507, 8.49048134405107, 8.67065368632907, 8.70668960445667, 8.74272600580827, 8.77876289038387, 8.81480025818347, 8.85083810920707, 8.88687644345467, 8.92291526092627, 8.95895456162187, 8.99499434554147, 9.03103461268507, 9.21124319676307, 9.57169660671907, 9.93219833907507, 10.2927483938311, 10.6533467709871, 11.0139934705431, 11.3746884924991, 11.7354318368551, 12. 0962235036111, 12.4570634927671, 12.8179518043231, 13.1788884382791, 13.5398733946351, 13.9009066733911, 14.2619882745471, 14.6231181981031, 14.9842964440591, 15.3455230124151, 15.7067979031711, 16.0681211163271, 16.4294926518831, 16.7909125098391, 17.1523806901951, 17.5138971929511, 17.8754620181071, 18.2370751656631, 18.5987366356191, 18.9604464279751, 19.3222045427311, 19.6840109798871, 20.0458657394431, 20.4077688213991, 20.7697202257551, 21.1317199525111, 21.4937680016671] s*uPa.

A vector of water vapour thermal conductivity values used for one-dimensional table lookup based on the corresponding temperature value. The size of the vector must be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

By default value: [11.46288215976, 11.941997488935, 12.676358586935, 13.414208884935, 14.155548382935, 14.900377080935, 15.274099879935, 15.348949115735, 15.423833243535, 15.498752263335, 15.573706175135, 15.648694978935, 15.723718674735, 15.798777262535, 15.873870742335, 15.948999114135, 16.024162377935, 16.400502076935, 17.155798374935, 17.914583872935, 18.676858570935, 19.442622468935, 20.211875566935, 20.984617864935, 21.760849362935, 22. 540570060935, 23.323779958935, 24.110479056935, 24.900667354935, 25.694344852935, 26.491511550935, 27.292167448935, 28.096312546935, 28.903946844935, 29.715070342935, 30.529683040935, 31.347784938935, 32.169376036935, 32.994456334935, 33.823025832935, 34.655084530935, 35.490632428935, 36.329669526935, 37.172195824935, 38.018211322935, 38.867716020935, 39.720709918935, 40.577193016935, 41.437165314935, 42.300626812935, 43.167577510935, 44.038017408935] mW/(K*m).

Coefficient for water vapour diffusive flow in a humid air mixture due to water vapour concentration differences. When reversing the mixture flow, the mass flow rate of water vapour at the ports smoothly transitions from an upstream value to a downstream value based on the diffusion coefficient.

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

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

Dependencies

Used when Trace gas model is set to Track mass fraction only or Track mass fraction and gas properties.

A vector of specific enthalpy values of impurity gases to be used for a one-dimensional table search based on the corresponding temperature value. The size of the vector should be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

The value by default is [439.555216260064, 444.670268200251, 452.538618847003, 460.487124258496, 468.522588768941, 476.649415958793, 480.74798538725, 481.57054318762, 482.394052398751, 483.218514288831, 484.043930029015, 484.870300696555, 485. 697627277859, 486.525910671489, 487.355151691079, 488.185351068185, 489.016509455051, 493.186704139431, 501.599194953048, 510.107689961685, 518.711611080182, 527.410026793075, 536.201764778798, 545.085474203452, 554.059675505208, 563. 122805485367, 572.27325096919, 581.509373027928, 590.829525105886, 600.232066705818, 609.715373581392, 619.277845178105, 628.917909922924, 638.634028838794, 648.424697859328, 658.288449140109, 668.223851601449, 678.229510889093, 688.304068901113, 698. 44620299875, 708.654624994591, 718.928079991818, 729.265345132425, 739.665228299475, 750.126566808087, 760.648226111439, 771.229098541268, 781.868102096908, 792.564179292476, 803.316296068366, 814.123440770426, 824.984623198037] kJ/kg.

Dependencies

Used when Trace gas model is set to Track mass fraction and gas properties.

A vector of impurity gas dynamic viscosity values used for a one-dimensional table search based on the corresponding temperature value. The size of the vector should be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

By default value: [10.8921054191698, 11.2215357085649, 11.7233300740382, 12.2234238147811, 12.7215124453467, 13.2173328890673, 13.4643203184773, 13.5136406274989, 13.562934752385, 13.6122025024997, 13.6614436900741, 13.7106581301692, 13.7598456406398, 13.8090060420983, 13.8581391578796, 13.9072448140062, 13.9563228391538, 14.2012926853717, 14.6890687376044, 15.1738428124161, 15.6554929043332, 16.1339159800463, 16.6090257998657, 17.0807510097148, 17.5490334645512, 18. 0138267508952, 18.4750948814453, 18.9328111390399, 19.3869570507278, 19.8375214755778, 20.2844997922255, 20.7278931741254, 21.1677079421287, 21.6039549853963, 22.036649242835, 22.4658092382469, 22.8914566632375, 23.3136160026627, 23.7323141980278, 24.1475803447965, 24.5594454200432, 24.9679420372927, 25.3731042257492, 25.774967231431, 26.1735673380029, 26.5689417053362, 26.9611282240413, 27.350165384404, 27.73609215832, 28.118947892972, 28.4987722151178, 28.8756049449796] s*uPa.

Dependencies

Used when Trace gas model is set to Track mass fraction and gas properties.

A vector of impurity gas thermal conductivity values to be used for a one-dimensional table search by the corresponding temperature value. The size of the vector should be the same as the size of the vector of temperature values . The properties of dry air, water vapour and impurity gases have the same vector of temperature values .

By default value: [10.489430678843, 10.9507672150864, 11.666197960308, 12.392559739764, 13.1299519771612, 13.8778409888416, 14.2554325416312, 14.3312274189707, 14.4071122346908, 14.4830860227061, 14.5591478179508, 14.6352966574703, 14.7115315815553, 14.787851634907, 14.8642558678259, 14.9407433374142, 15.0173131087819, 15.401364480906, 16.1751373988038, 16.9558134611595, 17.7432208682398, 18.5366976599676, 19.3360988502003, 20.1412225692689, 20.9517507672929, 21. 7672310558863, 22.5871115634685, 23.4107980865695, 24.2377021890869, 25.0672663781241, 25.8989689893876, 26.732318357514, 27.5668446164644, 28.4020933015927, 29.2376215872816, 30.0729965057542, 30.9077942826816, 31.7416001931033, 32.5740086297993, 33.4046232539953, 34.2330571812868, 35.0589331874899, 35.8818839295189, 36.701552179391, 37.5175910702657, 38.3296643536716, 39.1374466671854, 39.9406238119064, 40.7388930391313, 41.5319633456945, 42.3195557774861, 43.1014037407076] mW/(K*m).

Dependencies

Used when Trace gas model is set to Track mass fraction and gas properties.

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

Dependencies

Used when Trace gas model is set to Track mass fraction only or Track mass fraction and gas properties.