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International Journal of Biometeorology

, Volume 62, Issue 5, pp 773–781 | Cite as

PID temperature controller in pig nursery: spatial characterization of thermal environment

  • Juliana de Souza Granja Barros
  • Luiz Antonio Rossi
  • Zigomar Menezes de Souza
Original Paper

Abstract

The use of enhanced technologies of temperature control can improve the thermal conditions in environments of livestock facilities. The objective of this study was to evaluate the spatial distribution of the thermal environment variables in a pig nursery with a heating system with two temperature control technologies based on the geostatistical analysis. The following systems were evaluated: overhead electrical resistance with Proportional, Integral, and Derivative (PID) controller and overhead electrical resistance with a thermostat. We evaluated the climatic variables: dry bulb temperature (Tbs), air relative humidity (RH), temperature and humidity index (THI), and enthalpy in the winter, at 7:00, 12:00, and 18:00 h. The spatial distribution of these variables was mapped by kriging. The results showed that the resistance heating system with PID controllers improved the thermal comfort conditions in the pig nursery in the coldest hours, maintaining the spatial distribution of the air temperature more homogeneous in the pen. During the hottest weather, neither system provided comfort.

Keywords

Animal ambiance Geostatistics Spatial variability Weaned piglets 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Copyright information

© ISB 2017

Authors and Affiliations

  1. 1.University of Campinas, UNICAMP, School of Agricultural EngineeringCampinasBrazil

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