Sweating rate of dairy cows under shade and sunny environments

K. G. Gebremedhin, P. E. Hillman, C. N. Lee, R. J. Collier

Research output: Contribution to conferencePaperpeer-review

2 Scopus citations

Abstract

Sweating rates from live Holstein cows were measured using a closed chamber VapoMeter, and a portable calorimeter. Measurements were made when cows were in shade and exposed to direct sunlight under different air velocities. The effect of color of hair coat on sweating rate was compared. Comparisons of different sweat rate measuring systems were also compared. The sweating rate at zero air velocity using the VapoMeter was 62 g/h-m 2, and the sweating rates at 0.2 and 1.0 m/s measured using the portable calorimeter were 238 g/h-m 2 and 333 g/h-m 2, respectively when ambient temperature was 33°C, relative humidity was 52% and solar load was 740 W/m 2.

Original languageEnglish (US)
StatePublished - Nov 7 2007
Event2007 ASABE Annual International Meeting, Technical Papers - Minneapolis, MN, United States
Duration: Jun 17 2007Jun 20 2007

Other

Other2007 ASABE Annual International Meeting, Technical Papers
CountryUnited States
CityMinneapolis, MN
Period6/17/076/20/07

Keywords

  • Holstein cows
  • Portable calorimeter
  • Respiration rate
  • Shade
  • Sunlight
  • Sweating rate

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Engineering(all)

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