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K. P. Catherine Hui & Trever G. Crowe CSBE conference July 14, 2008 @ Vancouver

Comparison of simulated and field conditions within an actively heated and ventilated poultry transport system. K. P. Catherine Hui & Trever G. Crowe CSBE conference July 14, 2008 @ Vancouver. UNIVERSITY OF SASKATCHEWAN Saskatoon, Saskatchewan, Canada www.usask.ca. Outline. Background

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K. P. Catherine Hui & Trever G. Crowe CSBE conference July 14, 2008 @ Vancouver

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  1. Comparison of simulated and field conditions within an actively heated and ventilated poultry transport system K. P. Catherine Hui & Trever G. Crowe CSBE conference July 14, 2008 @ Vancouver UNIVERSITY OF SASKATCHEWAN Saskatoon, Saskatchewan, Canada www.usask.ca

  2. Outline • Background • Field Tests • Simulation • Summary

  3. Research Program

  4. Diffuser Screens Mixing Fans Broiler Load Exhaust Fans Heaters Damper

  5. What is CFD? • Computational Fluid Dynamics • It is a numerical method for solving partial differential equations which govern fluid dynamics and heat transfer processes • It can simulate the distributions of • Velocity • Pressure • Temperature • Other related variables

  6. Research Objectives • To model velocity, temperature and relative humidity distributions inside the loaded area of the prototype trailer, based on a variety of boundary conditions. • Use the CFD model as a tool to predict these distributions at new boundary conditions and animal stocking density.

  7. Instrumentation

  8. Anglia Autoflow Module

  9. Experimental Results

  10. U of S PROTOTYPE TRAILER PASSENGER FRONT BACK MIDDLE FRONT BACK DRIVER Avg. T (3:15 to 3:45): Ambient -15.78 ºC Min 4.38 ºC Max 26.49 ºC DOA 2 FRONT BACK

  11. Boundary conditions

  12. Simulation setup 3 D (double precision) Steady state Turbulent flow (standard k-epsilon model) Air as fluid Volumetric heat source Within the drawers Heat source of 980.49 W/m3 ~0.6536 W/m3/bird (1500 chickens)

  13. Air flow

  14. ΔT ≈ 15ºC ΔT ≈ 10ºC

  15. Summary • Work-in-progress • Temperature results of the simple heat transfer model is in the same order of magnitude as the experimental results. • Advantage • To simulate complex physics • To simulate data which are difficult to collect experimentally • To provide more controlled, repetitive experimental conditions • Disadvantage • Simplifications of the physics & geometry • Require knowledge in heat transfer, fluid mechanics, CFD, software/programming • Time consuming to do meshing & develop the model • Cost: high-end computers & software licensing

  16. Saskatchewan Agriculture and Food Acknowledgements

  17. Contact info Dr. Trever Crowe trever.crowe@usask.ca Catherine Hui catherine.hui@usask.ca

  18. Hardware New Hardware Xi lab Remote desktop IBMx3250 luserver Xeon dual 4GB of RAM Reserved 3 units 20.0 GB network files storage

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