牧草草捆的干燥效率研究

Study on the Drying Efficiency of Hay Bales

摘要: 针对牧草缓慢自然风干营养物质损失的问题，本文提出以草捆为单位进行干燥的新型牧草干燥设备，通过实验和仿真进行了牧草草捆的干燥效率影响因素的研究。本文采用人工试验台对初始含水率为35%左右的草捆进行了实验，利用Fluent软件建立了基于多孔介质的草捆模型，研究了牧草草捆含水率变化的影响因子。结果表明：草捆随时间的含水率变化基本遵循指数规律递减。对于给定的草捆，通过新型牧草干燥设备大约15分钟持续干燥，草捆的含水率会从35%降低到20%。提出了一个草捆的数学干燥模型，为后续牧草草捆的干燥研究和设备研发提供参考。

Abstract: Aiming at the problem of the loss of nutrients in the slow natural air drying of the forage, this paper proposes a new type of forage drying equipment that uses the bale as a unit to dry the forage. Through experiments and simulations, the research on the factors affecting the drying efficiency of the forage bale is carried out. In this paper, an artificial test rig is used to experiment with a bale with an initial moisture content of about 35%. A model of the bale based on porous media is established using Fluent software to study the influence factors of the change in the moisture content of the forage bale. The results show that the moisture content of the bale with time basically follows an exponential law to decrease. For a given bale, the moisture content of the bale will be reduced from 35% to 20% through the continuous drying of the new pasture drying equipment for about 15 minutes. A mathematical drying model of straw bales is proposed to provide reference for the subsequent drying research and equipment development of forage bales.