Investigation of the possibility of radiation screen application of the ambient air temperature sensor

by

A.A. Egorkin1,2, V.P. Evstigneev1,2, S.Y. Samoilov2

1Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

2Sevastopol State University, RF, Sevastopol, Universitetskaya St., 33

DOI: 10.33075/2220-5861-2024-1-23-29

UDC 502.3, 551.504.54

EDN: https://elibrary.ru/ddpddn

Abstract:

Special sensors are used to measure the surface temperature of the environment. The rate of global change in surface air temperature is about 0.2°C per decade. Due to the effects of solar radiation, modern air temperature sensors inside a naturally ventilated radiation shield can produce a measurement error of 0.8°C or higher. To improve the accuracy of observations of air temperature and adjust the measuring equipment, it is necessary to take into account the radiation error. To reduce this error, it is proposed to investigate the dependence of the protective properties of the radiation shield on changes in the temperature regime, which changes at wind speed. For this purpose, it is proposed to use the computational fluid dynamics (CFD) method. The CFD method is implemented to study the radiation error of a naturally ventilated radiation shield under various environmental conditions. The lowest radiation error obtained as a result of the experiments is 0.5°C at a wind speed of 2 m/s. The chosen design of the “radiation shield” blocks the direct solar radiation and most of the upward radiation well. The studied design of the “radiation shield” is suitable for the use in climate control systems on the territory of the Crimean Peninsula. Further research and the construction of a simulation calculation model should be aimed at reducing the temperature measurement error caused by solar radiation.

Keywords: atmosphere, meteorology, climatology.

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