The differences between temperatures in the animal occupied zone (AOZ) and temperatures measured by control system sensors are rarely explored. This experimental study quantifies the dry-bulb air temperature [hereinafter temperature] distribution inside a finisher pig building that combines natural ventilation through automatically controlled openings with a mechanical ventilation system. Year-long temperature data from 28 sensors located at 3 different heights in the building was analysed to help understand the temperature distributions and indicate the temperatures below or above an assumed optimal temperature range, defined as between 14 °C and 24 °C. Relatively large variations in the spatial temperature distribution were found, and they were higher in the vertical direction than in the longitudinal direction. The temperatures measured in the AOZ at 0.25 m height, were on average, 7 °C warmer than that at 1.5 m height. The AOZ temperature correlated better with temperatures measured at 0.7 m or 1.5 m height in the same pen than with temperatures measured in the AOZ at other pens. The analyses show that a proportional–integral based control system effectively counteracts the effects of outdoor wind conditions, and the control system is capable of maintaining the defined optimal temperature at the measurement height. However, the optimum temperatures at the measurement heights above AOZ do not correspond to the measured temperatures in the AOZ.

中文翻译：

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具有混合通风的育肥猪舍的温度分布

很少探讨动物居住区 (AOZ) 中的温度与控制系统传感器测量的温度之间的差异。该实验研究量化了育肥猪舍内的干球空气温度 [以下简称温度] 分布，该舍舍通过自动控制的开口将自然通风与机械通风系统相结合。分析了位于建筑物 3 个不同高度的 28 个传感器的全年温度数据，以帮助了解温度分布，并指示低于或高于假设的最佳温度范围（定义为 14 °C 至 24 °C）的温度。发现空间温度分布变化较大，垂直方向高于纵向。在 AOZ 高度 0.25 m 处测得的温度平均比 1.5 m 高度处高 7 °C。AOZ 温度与同一围栏中 0.7 m 或 1.5 m 高度处测得的温度的相关性比与其他围栏中 AOZ 中测得的温度的相关性更好。分析表明，基于比例积分的控制系统有效地抵消了室外风条件的影响，并且该控制系统能够在测量高度保持定义的最佳温度。但是，AOZ 以上测量高度的最佳温度与 AOZ 中的测量温度不一致。与在其他围栏中 AOZ 中测量的温度相比，同一围栏中的 5 m 高度。分析表明，基于比例积分的控制系统有效地抵消了室外风条件的影响，并且该控制系统能够在测量高度保持定义的最佳温度。但是，AOZ 以上测量高度的最佳温度与 AOZ 中的测量温度不一致。与在其他围栏中 AOZ 中测量的温度相比，同一围栏中的 5 m 高度。分析表明，基于比例积分的控制系统有效地抵消了室外风条件的影响，并且该控制系统能够在测量高度保持定义的最佳温度。但是，AOZ 以上测量高度的最佳温度与 AOZ 中的测量温度不一致。