Air temperature characteristics zoning for assessing enclosing structures thermal reliability

Abstract

An objective numerical indicator of enclosing structure thermal reliability level is probable duration of thermal failure state, for assessment of which statistical ambient air temperature characteristics per each month of the year is required. The purpose of the work is to summarize the available meteorological data and perform administrative-territorial zoning of Ukraine according to statistical characteristics of air temperature for all months of the year.

Such zoning is performed according to 414 plain observation points of Ukraine. The duration of observations mainly varies from 20 to 70 years, with 100 years for some weather stations. For each of 24 administrative regions of Ukraine, the Autonomous Republic of Crimea and the Southern Coast of Crimea, regional functions of mathematical expectation and air temperature standard in the form of sequences of 12 monthly values have been established. The number of observation points within the regions varies from 2 in Chernivtsi oblast to 35 in Crimea. Mathematical expectations (monthly average values) of air temperature for each of the regions are defined as weighted average values from all observation points of the region with weight factors equal to the number of observations years. As a result of calculations, tables of annual functions mathematical expectation and standard are obtained, which allow presenting the temperature of atmospheric air in each of the 26 regions in the form of sequences of 12 normally distributed random variables. The obtained results confirmed the expediency of excluding the Southern coast of Crimea to a separate zone with significantly higher air temperatures.

The results of the performed zoning allow using them as initial data for probabilistic estimation and comparative analysis of thermal failures duration of the enclosing designs intended for operation in different regions of Ukraine.