摘要
针对围护结构材质为钢筋混凝土的浅圆仓,为了准确模拟外部环境对粮堆温度的影响,研究建立了符合局地气候条件的“粮堆—围护结构—环境”传热模型。通过在粮堆模型外部增加围护结构区域并考虑其传热性质,使得建立的模型可以体现出粮仓围护结构对粮堆与外部环境温度之间传热过程的迟滞效应。在此基础之上,以济南市2021年5月至9月的逐时大气温度数据作为输入,模拟了不同围护结构传热参数设定对粮堆温度演化的影响,模拟结果表明,围护结构的物性参数会对粮堆温度的数值和波动幅值产生影响。因此,在模拟围护结构材质为钢筋混凝土的浅圆仓内部粮堆温度演化时,考虑围护结构的传热作用是模拟结果准确的重要前提。
In order to accurately simulate the influences of the external environment on the temperature field of the grain pile in grain storage bins whose envelop enclosure is reinforced concrete,a heat transfer model including‘grain pile-thermal insulation layer-environment’meeting the local climatic conditions was proposed.By adding the thermal insulation layer region outside the grain pile and considering its heat transfer properties,the numerical model established in this study could consider the resistance and relaxation effects of the thermal insulation layer on the heat transfer process between the grain pile and the external ambient temperature.On this basis,the hourly atmospheric temperature data of Jinan from May to September 2021 was input,the influences of the heat transfer parameter settings of the thermal insulation layer on the evolution of grain pile temperature were simulated.The results of simulation indicated that the parameters of the thermal insulation layer significantly affected the predicted grain pile temperature and its fluctuation amplitude.Therefore,when the temperature evolution of the grain pile in grain storage bins with concrete was predicted as the thermal insulation layer,the thermal insulation layer was considered as important prerequisites for the accuracy of the prediction results.
作者
刘济洲
王远成
郭耀骏
谢宝东
Liu Jizhou;Wang Yuancheng;Guo Yaojun;Xie Baodong(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101)
出处
《中国粮油学报》
CSCD
北大核心
2023年第7期18-25,共8页
Journal of the Chinese Cereals and Oils Association
基金
山东建筑大学博士基金项目(X21107Z)
国家重点研发计划资助项目(2016YFD0401002)。
关键词
浅圆仓
围护结构
粮堆温度
数值模拟
grain storage bin
thermal insulation layer
grain pile temperature
numerical simulation
