A commercial low-profile cross-ventilated system (LPCV) free-stall barn with evaporative cooling pads on the air intake side was used to assess the potential of cross-ventilation with evaporative cooling to alleviate heat stress in lactating dairy cows. A total of 5712 records (238 days × 24 h) of air temperature (AT) and relative humidity (RH) values were collected. In order to state the effectiveness of the ventilation system and potential heat stress, the temperature humidity index (THI) and enthalpy (h) were calculated outside and inside the LPCV barn. The cooling capacity of the LPCV system is greater in conditions of low humidity, and the difference between the values of the internal and external temperature reached −12 °C. The LPCV reduced exposure to heat stress, increasing the time cows spent in thermoneutral conditions. This system could reduce the occurrence of temperature above 25 °C from 33 to 5% and 11% in sections A (represents the inlet side of the barn) and D (represents the outlet side of the barn), respectively. On the other hand, the LPCV kept a high and constant rate of RH throughout the day. The average inside and outside AT were significantly different, but differences in temperature were observed across the width of the barn. Analyzing the barn by the indexes, the THI showed that the barn promoted cows more time confined under non-stressful thermal conditions (between 83.8 and 90% vs 68.7%) and stress period much lower compared to the external environment (between 10 and 16.2% vs. 31.3%). The enthalpy index showed that there was not much difference between the internal and external environments. The LPCV system is another installation alternative for raising dairy cow in a hot and humid climate.

使用在进气侧配有蒸发冷却垫的商用低剖面交叉通风系统 (LPCV) 自由档牛舍来评估交叉通风与蒸发冷却在缓解泌乳奶牛热应激方面的潜力。共收集5712条（238天×24小时）气温（AT）和相对湿度（RH）值记录。为了说明通风系统的有效性和潜在的热应力，计算了 LPCV 牛舍外部和内部的温度湿度指数 (THI) 和焓 (h) 。LPCV系统在低湿度条件下制冷能力更大，内外温差达到-12℃。LPCV 减少了奶牛遭受热应激的情况，增加了奶牛在中性条件下度过的时间。该系统可以将 A 部分（代表牛舍入口侧）和 D 部分（代表牛舍出口侧）中高于 25 °C 的温度发生率分别从 33% 减少到 5% 和 11%。另一方面，LPCV 全天保持较高且恒定的相对湿度。AT 内部和外部的平均温度存在显着差异，但在谷仓宽度范围内观察到温度差异。通过指标对牛舍进行分析，THI 表明，与外部环境相比，牛舍促进奶牛在无应激热条件下的限制时间更长（83.8% 至 90% 与 68.7% 之间），并且应激期要低得多（10% 至 16.2% 之间）对比 31.3%）。焓指数显示内部和外部环境没有太大差异。LPCV 系统是在炎热潮湿气候下饲养奶牛的另一种安装替代方案。