Thermal Work Limit Index in Cattle Farm

Abstract

The survey was conducted in workers in dairy farming in Bulgaria. In the survey were not reported Thermal Work Limit (TWL) index values, which require cessation of employment and constitute a danger to human health. The lowest values of TWL were registered during the summer and spring months, respectively 229.3 and 258.4 W/m2. The highest are normally registered in the autumn and winter months - 318.3 and 312.2 W/m2. Outdoor the lowest average TWL values were reported in the summer and spring months 236 and 287.9 W/m2, respectively, and the highest in the autumn and winter months - 316.4 and 317.2 W/m2. An inverse dependency was found between the calculated values of Temperature-humidity index (THI) and the TWL.