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Presentation
Modeling partial surface evaporative cooling of chickens
Agricultural and Biosystems Engineering Conference Proceedings and Presentations
  • Tadayuki Yanagi, Jr., Iowa State University
  • Hongwei Xin, Iowa State University
  • Richard S. Gates, University of Kentucky
Document Type
Conference Proceeding
Conference
2001 ASAE Annual International Meeting
Publication Date
7-1-2001
Geolocation
(38.5815719, -121.4943996)
Abstract

A transient model was developed to predict heat and mass transfer between the environment and chickens subjected to partial surface evaporative cooling under various dry to humid, calm to drafty and hot conditions. A factorial experiment composed by 3 air dry-bulb temperatures (tdb) (35, 38 and 41 °C), 2 dew point temperatures (tdp) (21.1 and 26.7 °C) and 3 air velocities (V) (0.2, 0.7 and 1.2 m.s -1 ) was designed to evaluate the physiological responses of the birds subject to thermal stress with and with out use of direct evaporative cooling. Deep body temperature (tb) and surface temperature (tsurf) were measured throughout the tests via telemetry and thermography, respectively. The model predicts tb rise after 50 min of acute heat exposure (Dtb,50), and it can also be used to predict the effects of wetness level (b) and V on Dtb,50. The model provides a convenient, interactive tool for determining Dtb,50 on wetted and non-wetted hens as a function of environmental conditions.

Comments

This is an ASAE Meeting Presentation, Paper No. 013011

Copyright Owner
American Society of Agricultural Engineers
Language
en
Citation Information
Tadayuki Yanagi, Hongwei Xin and Richard S. Gates. "Modeling partial surface evaporative cooling of chickens" Sacramento, CA(2001)
Available at: http://works.bepress.com/richard-gates/60/