Empirical Model to Calculate the Thermodynamic Wet-Bulb Temperature of Moist Air

Abstract

An equation model for calculating the adiabatic temperature of the wet-bulb thermometer has been obtained empirical fit through a meteorological database, specificly a trough relative humidity and air temperature. A comparison of the results of calculations with the use of this equation and from meteorological database was made. The model deducted of the comparison is valid for a dry bulb temperature range of 3°C to 35°C and for relative humidity percentage in a range of 7% to 97%. Normalized errors are less than 5.5%. It means a maximum variation of 0.55°C from data. However, this variation from error represents only 3.6% of the data sample. The equation model was satisfactory.

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Estrada-Jaramillo, M. , Vera-Romero, I. , Martínez-Reyes, J. , Ortíz-Soriano, A. and Barajas-Ledesma, E. (2014) Empirical Model to Calculate the Thermodynamic Wet-Bulb Temperature of Moist Air. Engineering, 6, 500-506. doi: 10.4236/eng.2014.69052.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] Xuan, Y.M., Xiao, F., Niu, X.F., Huang, X. and Wang, S.W. (2012) Research and Application of Evaporative Cooling in China: A Review (I)—Research. Renewable and Sustainable Energy Reviews, 16, 3535-3546.
http://dx.doi.org/10.1016/j.rser.2012.01.052
[2] Saudagar, R.T., Ingole, P.R., Mohod, T.R. and Choube, A.M. (2013) A Review of Emerging Technologies for Solar Air Conditioner. International Journal of Innovative Research in Science, Engineering and Technology, 2, 2356-2359.
[3] Farzaneh, G.M. and Deymi, D.M. (2011) Effect of Various Inlet Air Cooling Methods on Gas Turbine Performance. Energy, 36, 1196-1205. http://dx.doi.org/10.1016/j.energy.2010.11.027
[4] Rydstrand, M.C., Westermark, M.O. and Bartlett, M.A. (2004) An Analysis of the Efficiency and Economy of Humidified Gas Turbines in District Heating Applications. Energy, 29, 1945-1961.
http://dx.doi.org/10.1016/j.energy.2004.03.023
[5] Jonssona, M. and Yan, J. (2005) Humidified Gas Turbines—A Review of Proposed and Implemented Cycles. Energy, 30, 1013-1078. http://dx.doi.org/10.1016/j.energy.2004.08.005
[6] American Society of Heating, Refrigerating and Air-Conditioning Engineers (2001) ASHRAE Fundamentals Handbook (SI). Chapter 6. Psychrometrics. 6.1-6.17. Atlanta.
[7] Alliston, C.W. and Wolfe, S.A. (1973) Computation and Summary of Psychrometric Data from Dry Bulb and Dew Point Temperatures. Agricultural Metereology, 11, 169-176.
http://dx.doi.org/10.1016/0002-1571(73)90061-7
[8] Wilhelm, L.R. (1976) Numerical Calculation of Psychrometric Properties in SI Units. Transactions of the ASAE (American Society of Agricultural Engineers), 19, 318-321. National Agricultural Library Catalog (AGRICOLA), Beltsville.
[9] Singh, A.K., Singh, H., Singh, S.P. and Sawhney, R.L. (2002) Numerical Calculation of Psychrometric Properties on a Calculator. Building and Environment, 37, 415-419.
http://dx.doi.org/10.1016/S0360-1323(01)00032-4
[10] Wang, D.C., Fang, W. and Fon, D.S. (2002) Development of a Digital Psychrometric Calculator Using MATLAB. Acta Hort, 578, 339-344.
[11] Nelson, H.F. and Sauer, H.J. (2003) Thermodynamic Properties of Moist Air: -40 to 400°C. Proceedings of the 41st Aerospace Sciences Meeting and Exhibit, Reno Nevada, 6-9 January 2003, 1-11.
[12] Anguiano, J.C., Ruíz, J.C., Alcántar, J.R., Vizcaino, I.V. and González, I.A. (2006) Basic Climatological Statistics of Michoacán State (Period 1961-2003). Technical Book No. 3. INIFAP, México.

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