Heat load index

Gaughan et al. (2008) proposed this thermal comfort index for feedlot beef cattle in Australia. It can be calculated for two different environmental conditions:

where:
 is the black globe temperature (°C)
v is the wind speed .
R is the relative humidity (%).
Based upon these equations, the environment is classified as thermoneutral (HLI≤70.0), warm (HLI is 70.1 to 77.0), hot (HLI is 77.1 to 86.0) or very hot (HLI>86).

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