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| 寒旱区双层膜日光温室南侧不同保温结构土壤水热试验与模拟 |
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张旭1,塔娜1*,甄琦2,孙云峰1,2,闫彩霞1,2,察苏娜1,宋财柱1
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| (1.内蒙古农业大学 机电工程学院, 呼和浩特 010018;2.内蒙古农业大学 能源与交通工程学院, 呼和浩特 010018) |
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| 摘要: |
| 针对北方寒旱地区冬季期间温室南侧边际区域土壤温度较低的问题，采用试验和模拟的方法，在温室中部设置无保温区、挤塑聚苯乙烯泡沫板保温区(保温材料埋深30和60 cm)和水泥砖保温区(保温材料埋深30 cm)，对各试验区距地表5、15、25和55 cm土壤的温度和含水率变化进行研究。结果表明:1)距地表5 cm土壤温度主要受土壤含水率影响，并与含水率呈负相关；2)距地表15~55 cm土壤温度受保温结构作用影响较大，无保温组的土壤温度始终低于有保温组的土壤温度，最大土壤温度相差1.2 ℃；3)相同埋深下，挤塑聚苯乙烯泡沫板保温性优于水泥砖，2种保温结构的温室南侧边际区域最大土壤温度差值为0.3 ℃；4)对模拟运用瞬态法求解，模拟值与实测值在y=x函数线上最小拟合度为0.961，最大均方误差为0.037，表明所建模型模拟精度较高。 |
| 关键词: 双层膜日光温室 南侧边际 保温结构 土壤水热耦合 土壤温度 |
| DOI：10.11841/j.issn.1007-4333.2022.08.16 |
| 投稿时间：2021-11-18 |
| 基金项目:国家自然科学基金项目(61663038) |
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| Experiment and simulation of soil water and heat with different thermal insulation structures on the south side of double-layer solar greenhouse in cold and arid regions |
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ZHANG Xu1,Tana1*,ZHEN Qi2,SUN Yunfeng1,2,YAN Caixia1,2,Chasuna1,SONG Caizhu1
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| (1.College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;2.College of Energy and Transportation Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China) |
| Abstract: |
| In response to the problem of low soil temperature in the marginal area on the southern side of the greenhouse during winter in the cold and arid regions of the northern China, experiment and simulation method was used, non-insulation zone was set, polystyrene foam board insulation zone(insulation material buried depth 30 and 60 cm)and cement brick insulation zone(insulation material buried depth 30 cm)in the middle of the greenhouse were extruded. The changes of soil temperature and moisture contents of 5, 15, 25 and 55 cm from the ground surface in the test area were studied. The results showed that: 1)The soil temperature at the distance of 5 cm from the ground surface was mainly affected by the soil moisture content, and had a negative relationship with the moisture content; 2)The soil temperature of 15-55 cm from the ground surface was greatly affected by the effect of the insulation structure, the soil temperature of the non-insulation group was always lower than the soil temperature of the insulation group, and the maximum soil temperature difference was 1. 2 ℃; 3)Under the same burial depth, the thermal insulation performance of extruded polystyrene foam board was better than that of cement brick, the maximum soil temperature difference in the southern marginal area of the greenhouse with two types of thermal insulation structures was 0. 3 ℃; 4)The simulation was solved by the transient method, the minimum fit between the simulated value and the measured value on the y=x function line was 0. 961, and the maximum mean square error was 0. 037, indicating that the model constructed in this study has a high simulation accuracy. |
| Key words: double-layer solar greenhouse southern margin thermal insulation structure soil water and heat coupling soil temperature |
