软籽石榴防寒设施CFD模拟优化

胡俊超; 马昊; 程博

doi:10.19998/j.cnki.2095-1795.2023.12.010

软籽石榴防寒设施CFD模拟优化

doi: 10.19998/j.cnki.2095-1795.2023.12.010

石河子大学农学院，新疆石河子 832061

基金项目: 石河子大学校基金资助项目(KX03100305)

详细信息

作者简介:
胡俊超，本科生，专业方向为防寒设施农业科学与工程　E-mail：1960301704@qq.com

程博，通信作者，讲师，主要从事防寒设施农业建筑节能及防寒设施园艺环境调控相关研究E-mail：346575885@qq.com

中图分类号: S628
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- 被引次数: 0
出版历程
- 收稿日期: 2023-03-06
- 修回日期: 2023-06-21
- 出版日期: 2023-12-20

CFD Simulation Optimization of Soft Seed Pomegranate Cold Protection Facility

College of Agriculture，Shihezi University，Shihezi Xinjiang 832061，China

摘要

摘要:
为探索解决露地软籽石榴种植越冬问题的新途径，设计、搭建了一种简易式非固定防寒设施，针对该防寒设施冬季日间集热特性，利用ANSYS Fluent建立了稳态模拟模型，对其进行了验证试验，并使用该模型对防寒设施参数（空气间层和通风孔直径）进行优化试验。验证试验表明，华氏度相对误差E_RE＜1‰，防寒设施内监测点温度模拟值的决定系数R²和均方根误差E_RMSE分别为0.9625与1.19 K，表明模型可信度较高。优化试验表明，防寒设施空气间层厚度最佳3 cm、通风孔直径最佳14 cm。
- 软籽石榴 /
- 防寒设施 /
- CFD模拟
Abstract:
In order to explore a new way to solve overwintering problem of open-field soft seed pomegranate planting, a simple non-fixed cold-proof facility was designed and built．Aiming at daytime heat collection characteristics of facility in winter, ANSYS Fluent was used to establish a steady-state simulation model, and verification test was carried out．Then, the model was used to optimize facility parameters（air interlayer and diameter of ventilation hole）．Verification experiments showed that, relative error of Fahrenheit degree E_RE was less than 1‰, and tcoefficient of determination R² and root mean square error E_RMSE of temperature simulation values at monitoring points in the facility were 0.9625 and 1.19 K, indicating high reliability of the model．Optimization experiments showed that for cold proof facilities proposed, the best thickness of air interlayer was 3 cm, and the best diameter of ventilation hole was 14 cm．
- soft seeded pomegranate /
- cold protection facility /
- CFD simulation

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图 1 防寒设施剖面结构

1. 下通风孔　2. 采光集热板仰面　3. 空气间层　4. 上通风孔　5. 集热罩6. PVC塑料膜　7. 草苫　8. 集热采光板背面　9. 防寒设施内土壤

Figure 1. Profile structure sketch of cold-proof facilities

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图 2 采光集热板通风孔分布

Figure 2. Distribution of ventilation holes of heat collection panel

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图 3 防寒设施搭建

Figure 3. Construction of cold protection facilities

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图 4 防寒设施监测点温度模拟值与实测值比较

Figure 4. Comparison of simulated temperature values and measured temperature values at monitoring points of cold-proof facilities

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图 5 不同空气间层厚度与通风孔直径下监测点温度变化

Figure 5. Temperature variation of monitoring points with different air interlayer thickness and ventilation hole diameter

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表 1 防寒设施材料物理参数

Table 1. Physical parameters of facility materials

材料名称	密度/（kg·m⁻³）	热导率/（W·m⁻¹·K⁻¹）	比热/（J·kg⁻¹·K⁻¹）	吸收系数	折射率
空气	1.29	0.0242	1006.43		1
苯板	100	0.047	1380.00
土壤	1620	1.300	1480.00
铁	7874	46.520	460.00
草苫	120	0.060	1460.00
PVC膜	920	0.330	2550.00	1188.9	1.4

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表 2 日间边界条件设置

Table 2. Daytime boundary condition setting

壁面	材料	边界类型	设定值
采光集热板仰侧	苯板	耦合	内部辐射率1
4个通风孔	苯板	耦合	内部辐射率0.85
塑料罩	PVC薄膜	混合	参与太阳辐射
地面	土壤	温度壁面	内部辐射率0.90
南侧草苫	草苫	混合	内部辐射率0.90
采光集热板背侧	苯板	耦合	内部辐射率0.85
其他壁面	苯板	热通量	内部辐射率0.85

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表 3 模拟值与实测值相对误差

Table 3. Relative errors between simulated and measured values

测试点	模拟温度T_sim/K	测试温度T_exp/K	E_RE/‰
T_1,sun	290.26	292.05	0.613
T_2,sun	278.63	277.95	0.245
T_3,sun	281.87	280.95	0.327
T_1,cloud	281.45	280.25	0.428
T_2,cloud	274.54	273.35	0.435
T_3,cloud	276.29	275.25	0.378

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