Abstract
The article is devoted to the use of solar maps to determine the period of unwanted insolation and the amount of thermal radiation that penetrates into the tractor cabin throughout the entire working day. In addition, an optimal form of a sun-protection device has been proposed, which makes it possible to reduce the magnitude of the exposure dose of thermal radiation affecting the operator. Since solar radiation makes the main contribution to the heat balance of the cabins of mobile machines (tractors, combines, etc.), the results obtained can mainly be used in assessing the working conditions of operators and in calculating and choosing systems for normalizing the microclimate (ventilation and air conditioning).
Highlights
Solar radiation – electromagnetic oscillations with non-uniform wavelengths
A shadow mask is a graphical representation on a solar map of the area of shading of the sky with sun protection devices
Heat gain into the tractor cain from solar radiation through the light opening filled with green glass, which has a lower solar factor in comparison with clear glass, Qs, W/m2: Exposure dose of operator's thermal radiation, W h: The results of calculating the exposure dose of thermal radiation of the tractor operator confirm the higher energy efficiency of the vertical shading element in combination with green glass (65 %) (Table 1)
Summary
Solar radiation – electromagnetic oscillations with non-uniform wavelengths. The composition of solar radiation includes ultraviolet radiation with a wavelength of 290 to 400 nm, visible – from 400 to 760 nm and infrared – from 760 to 2800 nm. Infrared radiation (59 %), on the contrary, with prolonged exposure causes a negative effect - sunstroke Quite often, such situations can be observed in natural conditions when working in confined spaces, located in direct sunlight, for example, when operating mobile agricultural machinery (tractors, combines, etc.). To protect the operator’s workplaces from the harmful effects of solar radiation, the design of mobile agricultural machines provides various protective equipment, in particular canopies that prevent sunlight from entering the cabin. This is achieved by creating a shaded area at the operator’s workstation for a specified period of time during which exposure to sunlight is minimized [2,3,4,5]. 1) Build the shadow mask of the tractor cabin visor on the solar map. 2) Determine the period of maximum overheating and the amount of solar radiation and compare with the standard values. 3) Suggest the optimal shape of the visor of the tractor cabin
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call