基于热泵的大豆低温干燥储存系统设计

Design of Soybean Low Temperature Drying and Storage System Based on Heat Pump

中文关键词: 热泵  恒温  品质  干燥  数值模拟  育种

英文关键词: s-Agricultural Engineering[J]. Agricultural Science and Engineering in China, 2023, 35(6):65-71.

中文摘要:

      目的 针对环境温湿度变化以及大豆种子呼吸作用在储存室内引起的结顶、结块现象，造成储存过程中出现霉变或发芽等问题，基于热泵系统为大豆育种样本设计一套低温干燥储存系统。方法 通过数学模型计算各部件负荷，利用CFD模拟仿真技术选择合适的气流组织形式，然后对设计的系统送风温湿度稳定性、储存室内送风均匀性以及温度均匀性进行试验分析。结果 基于单侧送风+对侧回风气流组织设计的系统，在工作过程中，送风温度波动范围为±1 ℃，相对湿度波动范围为±4%，室内最大温度偏差为1.8 ℃，室内送风速度小于2 m/s。结论 基于合理的选型设计计算以及送风组织布置，结合育种样本长期储存的环境需求，设计了能够提供理想环境的控制系统，均匀的温度场以及气流分布在确保了样本储存质量的同时，有效降低了人工倒仓成本。这一设计能够为育种研究提供可靠的技术支持，对推动农业发展产生积极影响。

英文摘要:

      In response to the changes in environmental temperature and humidity, as well as the phenomenon of soybean seed respiration causing topping and clumping in the seed storage room, which leads to problems such as mold or germination during seed storage, the work aims to design a low temperature drying and storage system for agricultural products based on a heat pump system for soybean breeding samples. The load of each component was calculated through mathematical models. Appropriate airflow organization forms were selected according to CFD simulation technology results. Then an experimental analysis on the stability of the designed system's supply air temperature and humidity, the uniformity of indoor supply air, and the temperature uniformity was conducted. A system based on single side air supply and opposite side return air flow organization was designed. During the drying, the temperature fluctuation range of the air supply was ±1 ℃, the humidity fluctuation range was ± 4% RH, the maximum indoor temperature deviation was 1.8 ℃, and the indoor air supply speed was less than 2 m/s. The conclusion is based on reasonable selection design calculation and air supply organization layout. This design provides an ideal environment for the long-term storage of breeding samples. The uniform temperature field and airflow distribution not only effectively reduce the cost of manual storage, but also ensure the storage quality of samples. This design can provide reliable support for breeding research and have a positive impact on agricultural development.