While chicken meat production is less polluting than other meats, it remains a problem, given a target of 1 ton CO2-eq per capita in 2050. Most of the emissions are associated with feed production, but cold climate requires an additional energy input for space heating. This input is usually provided by propane gas. Since 2014, energy efficiency has sparked in the world of broiler production. Heat recuperation through heat exchanger can reduce significantly the heating requirement, by preheating fresh air inlet with stale air outlet. While there have been many studies on the improvement of direct ventilation in both hot and cold climate, little attention has been given to heat exchangers in broiler houses. It is therefore unknown how best to integrate this equipment in a broiler house to provide homogenous housing conditions (air temperature, humidity, contaminants). This thesis studies the integration of heat exchangers (HX) in a commercial broiler house located in a cold climate (Sainte-Melanie, Canada). The goal is to improve the housing conditions of a rectangular 1760 m3 broiler house equipped with two ductless air-to-air heat exchangers (0.38 m3s-1). Computational fluid dynamics (CFD) software OpenFOAM was used to create a 3D steady-state buoyant simulation with RNG k-e turbulence model. CFD model was validated with experimental data collected at the participating broiler house. In the original configuration (C0), the two heat exchangers are parallel, on the same longitudinal wall. Three alternative configurations (C1, C2, and C3) were studied to improve housing conditions at chick height (0.1 m): C1 consists of increasing the distance between the HX, C1 consists of a 30° rotation of the HX, and C3 consists of positioning one HX on each end wall. Air velocity, air temperature and age of air were used as performance criteria. All configurations behaved and performed differently. The configuration with the best overall performance was C2. It showed a 45% improvement in age of air distribution and 24% in velocity distribution. Temperature distribution also improved, but it was not reflected in the coefficient of variation.

中文翻译：

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使用 CFD 模拟改善寒冷气候肉鸡舍内的空气分配，包括热交换器

虽然鸡肉生产的污染比其他肉类少，但考虑到 2050 年人均二氧化碳当量 1 吨的目标，这仍然是一个问题。大部分排放与饲料生产有关，但寒冷的气候需要额外的能源输入以用于空间加热。该输入通常由丙烷气提供。自 2014 年以来，能源效率在肉鸡生产领域引发了轰动。通过换热器回收热量，通过预热新鲜空气入口和旧空气出口，可以显着降低加热需求。虽然已经有许多关于在冷热气候下改善直接通风的研究，但很少关注肉鸡舍中的热交换器。因此，不知道如何最好地将该设备集成到肉鸡舍中以提供均匀的鸡舍条件（空气温度、湿度、污染物）。本论文研究了位于寒冷气候（加拿大圣梅拉尼）的商业肉鸡舍中的热交换器 (HX) 集成。目标是改善配备两个无管空气对空气热交换器 (0.38 m3s-1) 的矩形 1760 m3 肉鸡舍的鸡舍条件。计算流体动力学 (CFD) 软件 OpenFOAM 用于创建具有 RNG ke 湍流模型的 3D 稳态浮力模拟。CFD 模型通过在参与的肉鸡舍收集的实验数据进行了验证。在原始配置 (C0) 中，两个热交换器平行，位于同一纵向壁上。研究了三种替代配置（C1、C2 和 C3）以改善雏鸡高度 (0.1 m) 的鸡舍条件：C1 包括增加 HX、C1 由 HX 旋转 30° 组成，C3 由在每个端壁上放置一个 HX 组成。空气速度、空气温度和空气年龄被用作性能标准。所有配置的行为和表现都不同。综合性能最好的配置是C2。它显示空气分布的年龄提高了 45%，速度分布提高了 24%。温度分布也有所改善，但并未反映在变异系数上。