| 聚光回热式太阳能土壤灭虫除菌装置光热性能 |
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| 引用本文： | 常泽辉,贾柠泽,侯静,郑宏飞,李文龙,刘洋.聚光回热式太阳能土壤灭虫除菌装置光热性能[J].农业工程学报,2017,33(9):211-217. |
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| 作者姓名： | 常泽辉 贾柠泽 侯静 郑宏飞 李文龙 刘洋 |
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| 作者单位： | 1. 内蒙古工业大学能源与动力工程学院,呼和浩特 010051;内蒙古工业大学风能太阳能利用技术省部教育部重点实验室,呼和浩特 010051;2. 内蒙古工业大学能源与动力工程学院,呼和浩特,010051;3. 内蒙古工业大学化工学院,呼和浩特,010051;4. 北京理工大学机械与车辆学院,北京,100081 |
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| 基金项目： | 国家自然科学基金项目（51666013）；内蒙古自然科学基金项目（2013MS0704，2015MS0545）；内蒙古工业大学风能太阳能利用技术省部共建教育部重点实验室开放基金（201511）；内蒙古工业大学科学研究重点项目（ZD201507） |
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| 摘 要： | 该文针对传统设施农业土壤灭虫除菌过程使用化学消毒法所带来的环境污染和农作物药物残留等问题,提出了新型聚光回热式太阳能土壤灭虫除菌装置,利用太阳能聚光集热技术加热空气进而对农业种植土壤进行高温消毒,同时将土壤所含有机物加热挥发,实现对农业种植土壤的修复,同时处理后的热土壤对进料空气进行预热,提高了装置的热能利用效率。该文介绍了聚光回热式太阳能土壤灭虫除菌装置的工作原理,利用光学仿真软件对装置中复合多曲面聚光器的光学效率进行了计算,基于光学计算结果,对聚光回热式太阳能土壤灭虫除菌装置的光热性能进行了室外试验,测试了装置的空气加热温度和集热效率。结果表明,用于土壤灭虫除菌的热空气在聚光比为3.6,流动速度为1.075 m/s时,装置的集热效率最高,加热后空气温度最高达到了88℃左右,集热效率为65%左右,能够满足农业土壤灭虫除菌所需的温度需求。
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| 关 键 词： | 土壤 灭菌 太阳能集光器 聚光 太阳能 光热转化效率 |
| 收稿时间： | 2016/12/21 0:00:00 |
| 修稿时间： | 2017/5/12 0:00:00 |
Performance on concentrating regeneration type solar soil deinsectization and sterilization device |
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| Chang Zehui,Jia Ningze,Hou Jing,Zheng Hongfei,Li Wenlong and Liu Yang.Performance on concentrating regeneration type solar soil deinsectization and sterilization device[J].Transactions of the Chinese Society of Agricultural Engineering,2017,33(9):211-217. |
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| Authors: | Chang Zehui Jia Ningze Hou Jing Zheng Hongfei Li Wenlong and Liu Yang |
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| Institution: | 1.College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; 2.Key Laboratory of Wind and Solar Power Energy Utilization Technology Ministry of Education and Inner Mongolia Construction, Inner Mongolia University of Technology, Hohhot 010051, China;,1.College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;,3.Chemical Engineering College, Inner Mongolia University of Technology, Hohhot 010051 China;,4.School of Mechanical and Vehicular Engineering, Beijing Institute of Technology, Beijing 100081, China;,1.College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; and 1.College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China; |
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| Abstract: | In the last several decades, the problem of food shortage has been one of the main challenges in the world. It is necessary to enhance the use of protected agriculture in order to promote better microclimate conditions allowing high productivity, stable quality, earliest harvest dates and thus better economic output and good environment quality and food security. However, there are pests and pathogenic bacteria in the soil of agriculture production systems due to an ideal temperature, no wind and high humidity conditions in soil. Then soil disinfection treatments are used in agriculture before planting high-value cash crops, to reduce soil-borne crops pests including bacterial, fungal and nematode pathogens, weeds and insects. Methyl bromide fumigation is the widely used as a disinfection method due to its low cost and high effectiveness. But gaseous methyl bromide may destroy stratospheric ozone. Hence, forthcoming agro-ecological techniques should both reduce pollution hazards and be compatible with sustainable development guidelines. Many other chemical fumigants have become strongly restricted and more ecological treatments are now been sought. Alternative sustainable techniques such as soil electrical disinfection, steam soil disinfection and flame soil disinfection are utilized. However, many of these methods have the major drawbacks of their effect strongly depends on fossil energy. Moreover, the employment on a large scale of these methods could lead to a strong increase in environmental pollution. For this reason, in this paper, we presented a novel concentrating regeneration type solar soil extermination and sterilization device, which used high temperature air to kill soil-borne crop pests, reducing the employment of chemical fumigants and improving the quality of agriculture products. The device consisted of trough compound parabolic concentrating system, soil feed system, soil and air regeneration system and forced draft system, et al. The operational principle of concentrating light and regeneration type solar soil extermination and sterilization device was introduced. A 3D model of the concentrator supported with optical analysis software was used to analyze the tracking accuracy. The distribution of the concentrated light of the absorber could be visualized. Based on the simulation results, an experimental set-up, which can be used to verify the heat collection efficiency and the heating temperature, was designed and constructed. The results indicated that the overall ray's receiving rate of the trough compound parabolic concentrating collector of 99.66%-62.20% were obtained with radial incidence angles of 0°-7°. The outlet air temperature of the device increased with the decreasing the air flow rate. The maximum outlet air temperature of the device at the air flow rate of 1.075m/s was higher than that of the device at the air flow rate of 4.076 m/s by 70℃. Under good sunshine in winter, the outlet air maximum temperature of the device with the tracking accuracy of 5°and the concentrating rate of 3.6 can reach to 88℃, and the heat efficiency can reach about 65%, thus, it is able to provide enough heat to soil disinfection in the protected agriculture, which is an idea solar soil extermination and sterilization method for protected agriculture. |
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| Keywords: | soil sterilization solar concentrator concentrating solar energy heat efficiency |
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