Ammonia and carbon dioxide are the most relevant among the harmful gases present in broiler houses and their effects on animal health depend on concentration and exposure time. Inside these houses, increasing ventilation is the most common strategy adopted to control the concentration of these gases. This strategy is effective but increases electrical energy consumption (for fan operation) and thermal energy consumption (for inlet air heating). In this work, the variations of energy consumption due to the increase of ventilation to maintain ammonia and carbon dioxide concentrations below established thresholds were evaluated. To carry out this analysis, various parameters (e.g. indoor air temperature and gas concentrations) of a broiler house located in the Mediterranean area were monitored during a production cycle in the cool (winter) season in which outdoor air temperature varied between 2 and 25 °C. The assessment of the increase in the energy consumption for climate control was carried out using the Specific Fan Performance and a customised building energy simulation model. The analysis showed that during the monitored period, the established thresholds of gas concentrations were exceeded approximately 60% of the time. To maintain the desired gas concentrations, the ventilation flow rate should be increased by 9%. This variation in the ventilation flow rate entailed a rise in the energy consumption by about 10% for electrical energy and by about 14% for thermal energy. Maintaining the gas concentration below the established thresholds entails an extra cost of around 0.02 € per harvested broiler.

中文翻译：

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通过通风降低肉鸡舍中的气体浓度：评估热能和电能消耗

氨和二氧化碳是肉鸡舍中存在的有害气体中最相关的，它们对动物健康的影响取决于浓度和暴露时间。在这些房屋内，增加通风是控制这些气体浓度的最常用策略。这种策略是有效的，但会增加电能消耗（用于风扇运行）和热能消耗（用于进气加热）。在这项工作中，评估了由于增加通风以维持氨和二氧化碳浓度低于既定阈值而导致的能源消耗变化。为了进行这种分析，各种参数（例如 位于地中海地区的肉鸡舍的室内空气温度和气体浓度）在凉爽（冬季）季节的生产周期中进行监测，室外空气温度在 2 到 25 °C 之间变化。使用特定风扇性能和定制的建筑能源模拟模型对气候控制的能耗增加进行了评估。分析表明，在监测期间，大约 60% 的时间超过了既定的气体浓度阈值。为了保持所需的气体浓度，通风流量应增加 9%。通风流量的这种变化导致电能消耗增加约 10%，热能增加约 14%。