Selection of the Design Outdoor Temperature in a Warm Period with Arbitrary Security

The relevance of the study is the need to have information on the estimated parameters of the outdoor climate in the design of HVAC systems in civil buildings, and with the incompleteness of such data mainly normative document of the Russian Federation in this area – SP 131.13330.2018 that becomes significant when the observed climate warming. The subject of the study is the principles of choosing the outdoor air temperature in the warm period of the year with increased security for the calculation of air conditioning systems. The purpose of the study is to obtain a method for calculating the calculated temperature in the warm period of the year, taking into account only the data in Table 4.1 of SP 131, with any security required by the customer exceeding the one set for parameters “B”. The research objective is to construct approximate relations for the outdoor temperature depending on its required availability and to obtain the values of the parameters included in these relations for specific construction areas. Materials and research methods used. A combination of probabilistic-statistical approach to the theory of approximation of functions by generalized polynomials is used, which allows to obtain an analytical expression for the calculated ambient air temperature when security exceeding adopted for the parameters “B” are applicable to all settlements within the territory of the Russian Federation. The results of the research. The forms of dependence for settlement temperature of external air from its security in the form of the exponential function gives correct results when the limit values of parameters based on the analysis of data on the number of hours standing outside temperature in the area of construction. The results of the corresponding calculations for the climatic conditions of Moscow and some other Russian cities and their comparison with the author’s data obtained earlier on the basis of the probability-statistical model are presented. It is proved that the power dependence provides values that exactly correspond to the data in Table 4.1 of SP 131 at the normalized level of security, including for the absolute maximum temperature.

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)

1. Malyavina E.G., Samarin O.D. Stroitel’naya teplofizika i mikroklimat zdanii [Construction thermophysics and microclimate of buildings]. Moscow: MISI-MGSU. 2018. 288 p.
2. Umnyakova N.P. Climatic parameters of typical year for thermal engineering calculations. BST: Byulleten’ stroitel’noy tekhniki. 2016. No. 8 (984), pp. 48–51. (In Russian).
3. Kobysheva N.V., Klyuyeva M.V., Kulagin D.A. Climatic risks of city heat supply. Trudy Glavnoy geofizicheskoy observatorii im. A.I. Voeykova. 2015. No. 578, pp. 75–85. (In Russian)
4. Naji S., Alengaram U.J., Jumaat M.Z, Shamshirband S., Basser H., Keivani A., Petkoviс´ D. Application of adaptive neuro-fuzzy methodology for estimating building energy consumption. Renewable and Sustainable Energy Reviews. 2016. Vol. 53, pp. 1520–1528.
5. Wang X., Mei Y., Li W., Kong Y., Cong X. Influence of sub-daily variation on multi-fractal detrended analysis of wind speed time series. PLoS ONE. 2016. Vol. 11. No. 1, pp. 6014–6284.
6. De Larminat P. Earth climate identification vs. anthropic global warming attribution. Annual Reviews in Control. 2016. Vol. 42, pp. 114–125.
7. Malyavina E.G., Malikova O.Yu., Fam V.L. Method for selection of design temperatures and outside air enthalpy during warm period of the year. AVOK. 2018. No. 3, pp. 60–69. (In Russian).
8. Malyavina E.G., Lyong F.V. Choice of the outdoor air design temperature and enthalpy according to the given provisions. SOK. 2017. No. 12 (192), pp. 74–76. (In Russian).
9. Guzhov S.V., Penkin P.A. Method of calculating the need for heat energy by Anadyr city. SOK. 2019. No. 12 (214), pp. 78–79. (In Russian).
10. Samarin O.D., Kirushok D.A. Estimation of external climatic parameters for air treatment with indirect evaporative cooling in plate heat recovery units. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2018. No. 4, pp. 41–43. (In Russian).
11. Samarin O.D. The probabilistic-statistical modeling of the external climate in the cooling period. Magazine of civil engineering. 2017. No. 5, pp. 62–69.