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Computational modeling of a conductive cooling system to alleviate heatstress in dairy cows

机译：导电冷却系统的计算建模，以缓解奶牛中的热应激

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Methods for alleviating heat stress in dairy cattle are currently limited to convective and evaporative cooling. These methods are effective in hot, dry conditions, but their performance decreases as the relative humidity of the environment increases.A conductive cooling system that circulates water through bedding materials could serve as an efficient method for relieving heat stress because it would not be directly affected by the environmental conditions that reduce the effectiveness of convective and evaporative cooling. While a conductive cooling system's effectiveness is limited by water temperature, the conductivity of the bedding material, and the depth of the heat exchanger, the water used in such systems can be recovered and used for other applications or even recirculated through the conductive cooling system. This study uses Computational Fluid Dynamics (CFD) to evaluate the efficiency of the heat exchanger under various conditions. The study's comprehensive heat and mass transfer model is capable of simulating changes in humidity and temperature, as well as several physiological characteristics or responses, such as sweating, heat generation, and heat transfer through skin and hair. Results show that in very hot and humid conditionsconductive cooling accounts for up to 70% of the body heat given off by a cow.
机译：用于缓解乳制品中的热应激的方法目前限于对流和蒸发冷却。这些方法在热干燥的条件下有效，但随着环境的相对湿度的增加，它们的性能降低。通过床具材料循环水的导电冷却系统可以作为缓解热应力的有效方法，因为它不会直接受到热应激的方法通过降低对流和蒸发冷却的有效性的环境条件。虽然导电冷却系统的有效性受水温的限制，但是床上用品的电导率和热交换器的深度，可以回收在这种系统中使用的水，并用于其他应用或甚至通过导电冷却系统再循环。本研究采用计算流体动力学（CFD）来在各种条件下评估热交换器的效率。该研究的综合热量和传质模型能够模拟湿度和温度的变化，以及若干生理特性或反应，例如通过皮肤和头发的出汗，发热和热传递。结果表明，在非常热和潮湿的条件下，冷却占牛的最高可达70％的体温。

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