PCM蓄冷板式冷藏车温度场数值模拟研究

Numerical Study on the Temperature Field of Refrigerated Vehicles with PCM Cold-storage Plates

本文以冷藏车为研究对象,建立了冷藏车箱体的物理模型和数学模型,将已研制的新型相变材料(HWY-1)运用到蓄冷式冷藏车内,并利用ANSYS-FLUENT对冷藏车车厢内的温度场进行了数值模拟。通过对冷藏车车厢内有蓄冷板和无蓄冷板温度场的模拟分析,研究车厢内不同横截面的温度。结果表明,在有蓄冷板的条件下距车厢底部500 mm、1000mm、1500 mm、1800 mm处的温度点,7 h后与初始温度相比分别下降了5.7%、24.5%、51.9%、76.3%,而在无蓄冷板的条件下,这些温度测点都有不同度的提高。因此,应用PCM蓄冷板式冷藏车车厢内的温度可以保持长时间低温,符合冷藏运输过程中实际需求。

In this paper, a physical model and mathematical model of refrigerated truck compartment was established using ANSYS-FLUENT, and a new phase change material（HWY-1） has been used in the refrigerated truck. The temperature field in the refrigerated truck compartment is numerically simulated. At the same time, the carriage with cool storage plate and no storage plate is simulated, and the temperature distribution of different section in different situations is studied. The results show that when the cold-storage plates are used, the temperature which is 500 mm, 1000 mm, 1500 mm and 1800 mm far from the bottom of the carriages decreases by 5.7%, 24.5%, 51.9% and 76.3% respectively, compared with the initial temperature after 7 hours. When no cold-storage plates are used, these temperature measuring points have different degrees of increasing. Therefore, the use of cold-storage plates allows the temperature of the vehicle to meet the requirements for proper storage of goods, and meets the actual requirements of cold storage.