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Development, validation, and demonstration of the herringbone parlor model.

Ryan Prendergast1, John Upton2, Michael D Murphy3

  • 1Teagasc Livestock Systems Dept., Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, P61 P302, Ireland; Department of Process, Energy and Transport Engineering, Munster Technological University, Cork, T12 P928, Ireland.

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A new model accurately simulates milking efficiency in herringbone parlors. Automation benefits are greatest in smaller parlors, with combined systems increasing efficiency by up to 26% in 1x16 setups.

Keywords:
empiricalherringbone parlormechanisticmilking efficiencyvalidation

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Area of Science:

  • Agricultural Engineering
  • Dairy Science
  • Farm Management

Background:

  • Milking parlor efficiency is crucial for dairy farm productivity.
  • Optimizing parlor design and automation requires accurate simulation tools.
  • Existing models may not fully capture the complexities of herringbone swing-over parlors.

Purpose of the Study:

  • To develop, validate, and demonstrate the Herringbone Parlor Model (HPM).
  • To simulate milking process time and efficiency in herringbone swing-over parlors.
  • To assess the impact of parlor size and automation on milking efficiency.

Main Methods:

  • Developed a mechanistic model (HPM) using empirical data from 16 Irish dairy farms.
  • Validated the HPM against empirical recordings, calculating Mean Absolute Percentage Error (MAPE).
  • Demonstrated the HPM across various parlor sizes (1x16, 1x20, 1x24) with different automation levels.

Main Results:

  • HPM achieved low MAPE values (e.g., 9.6% for cows/h, 8.4% for MPT).
  • Automation (ACR, rapid exit) provided greater efficiency gains in smaller parlors (e.g., 14% increase in 1x16 parlors).
  • Combined automation with an increased ACR threshold (0.8 kg/min) significantly boosted efficiency (up to 26% in 1x16 parlors).

Conclusions:

  • The HPM accurately simulates milking process time and efficiency.
  • Automation's impact on milking efficiency and labor varies significantly with parlor size.
  • Strategic decision-making regarding parlor configuration and automation is essential for optimizing dairy farm operations.