Analytical Calculation of the Outdoor Air Enthalpy in the Warm Period of the Year Using Data SP 131.13330.2018

The relevance of the research is related to the need to have information about the calculated parameters of the outdoor climate in the design of systems for providing microclimate of civil buildings and the lack of such data in the main regulatory document of the Russian Federation in this area – SP 131.13330.2018. The research is based on the principles of choosing the enthalpy of outdoor air in the warm season for the calculation of air conditioning systems. The purpose of the study is to obtain a method for calculating the uniform enthalpy of outdoor air in the warm period of the year, taking into account only the data in table 4.1 of SP 131 without using graphical interpolation on the map in The Appendix to the SP 131. The task of the study is to identify correlations for climate parameters that are essential for the method under consideration, and to construct a calculation formula for the outdoor air enthalpy according to parameters «B». A combination of probabilistic and statistical approach with basic relations of thermodynamics of humid air is used, which allows us to obtain an analytical expression for the enthalpy of outdoor air, which is valid within the main part of the territory of the Russian Federation. Correlations between the relative humidity of outdoor air and temperature for parameters «B» are given, as well as for the correction coefficient to the calculation formula obtained by comparing its results with the map data in The Appendix to the SP 131, and the accuracy of this coefficient is estimated.

O.D. SAMARIN, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

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