苦豆子堆腐产热对温室大棚内温度场的影响  

Effect of Composting Heat Production of Sophora alopecuroides L.on Temperature Field in Greenhouse

作　　者：李涛[1] 陈维铅[1] 陈祥玉 LI Tao;CHEN Weiqian;CHEN Xiangyu(Jiuquan Vocational and Technical College/Gansu Key Laboratory of Solar Power Generation System Project,Jiuquan Gansu 735000;School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050)

机构地区：[1]酒泉职业技术学院/甘肃省太阳能光伏发电系统工程重点实验室,甘肃酒泉735000 [2]兰州理工大学能源与动力工程学院,甘肃兰州730050

出　　处：《现代农业科技》2022年第7期120-125,共6页Modern Agricultural Science and Technology

基　　金：甘肃省高等学校创新能力提升项目(2019A-251)。

摘　　要：为探讨基质槽内苦豆子堆腐发酵产热对温室大棚内温度场的影响,在温室大棚内基质槽中堆腐发酵苦豆子秸秆,对7个基质槽的侧壁面和顶面分别布点测温,固定时间点监测14 d发酵历程的温度变化,同时建立7个基质槽堆腐发酵散热的温室环境几何模型,运用CFD模拟基质槽堆肥散热情况与7组试验数据的拟合度,分析堆腐产热对温室大棚内温度场的影响。结果表明,堆腐1~8 d时,7个基质槽的侧壁面、顶面平均温度缓慢升至最高,14 d温度回落至初始环境温度。当数值模拟散热以顶面散热为主导时,35℃堆体中间发热不明显,50℃发热明显,65℃基质槽顶面散热辐射区域最大;当基质槽侧壁面、顶面同时散热时,35℃温室内热源散热不明显,50℃时温室内上下层的流体形成清晰的分层现象;65℃时温室内上层热空气明显变厚。温室大棚内基质槽堆腐发酵苦豆子秸秆,7~8 d达到最高温度,顶面平均温度较侧壁面高4.5℃左右。在相同工况下,基质槽d、e、f、g的顶面和侧壁面散热量变化明显,对周边的温度场影响较大。In order to inquire the effect of heat production by Sophora alopecuroides L.composting and fermentation in substrate tank on temperature field in greenhouse,the composting and fermentation of Sophora alopecuroides L.straw was carried out in the substrate tank in the greenhouse,the temperature changes of the side wall and top surface of the seven substrate tanks were measured respectively,the temperature change of fermentation process during 14 days was detected at a fixed time point.At the same time,the greenhouse environment geometric model of heat dissipation of composting and fermentation in seven substrate tanks was established.The heat dissipation of compost in the substrate tank was simulated by CFD and compared with seven groups of experiments,the influence of heat produced by compost on internal temperature field in greenhouse was analyzed.The results showed that after composting for 1-8 days,the average temperature of the side wall and top surface of the seven substrate tanks slowly increased to the highest,and the temperature fell back to the initial ambient temperature after 14 days.When the heat dissipation was dominated by the top surface,the heat dissipation in the middle of the 35℃reactor was not obvious,while that in the 50℃reactor was obvious,and the radiation area of the 65℃substrate tank top surface was the largest;when the substrate tank side wall and top surface were radiating at the same time,the heat dissipation in greenhouse was not obvious at 35℃,and the fluid in the upper and lower layers of the greenhouse formed a clear stratification phenomenon at 50℃;when 65℃,the upper layer of hot air in the greenhouse became thicker obviously.Temperature of fermented Sophora alopecuroides L.straw was the highest in 7-8 days,and the average temperature of the top surface was about 4.5℃higher than that of the side wall.Under the same conditions,the heat dissipation of the top and side walls of the substrate tank d,e,f and g changed obviously,which had a great influence on the surroundin

关 键 词：苦豆子 温室大棚 基质槽 堆腐发酵 温度 

分 类 号：S565.3[农业科学—作物学]