摘要
以套管相变材料为研究对象,建立了一维热容热阻(2R1C、4R2C及6R3C)准动态简化传热模型,通过参数辨识获得模型R、C参数、模拟套管相变材料的传热特性,并对不同简化模型的准确性及适用性进行了对比分析。结果表明,与数值结果相比,利用4R2C模型模拟得到套管相变材料外、内套管表面热流密度平均相对误差分别为15.2%和10.1%,内管工质温度平均误差为0.13℃,表明了简化模型具有很好的准确性。在保证准确性的前提下,4R2C模型计算量及模型复杂程度适中、适用性更好;简化模型的计算时间为数值模型计算时间的0.05%左右,计算效率大大提高,能够广泛应用于套管相变材料的模拟与仿真。
A quasi dynamic simplified heat transfer model with different heat capacity and thermal resistances（2R1C,4R2C and 6R3C）for casing phase change materials were proposed.The parameters of the model were identified by genetic algorithm and the heat transfer characteristics were analyzed.Furthermore,the accuracy of different simplified models was compared.Results show that,compared with the numerical results,the average relative heat flow differences of the outer pipe surface and inner pipe surface solved by the 4R2C model are 15.2% and 10.1%,respectively.The average difference temperature of working fluid in the inner pipe is 0.13℃.The accuracy of the simplified model is good.The computational cost and complexity of the 4R2C model are reasonable and the applicability is better.The computational time of the simplified model is about 0.05% of that of the numerical model.The computational efficiency is high and suitable for the simulation of casing phase change materials.
作者
严天
徐新华
高佳佳
万航
YAN Tian;XU Xinhua;GAO Jiajia;WANG Hang(School of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《中国科技论文》
CAS
北大核心
2018年第11期1217-1221,共5页
China Sciencepaper
基金
国家自然科学基金资助项目(51678263)
关键词
建筑环境与能源
套管相变材料
准动态简化模型
参数辨识
传热特性
计算效率
building environment and energy engineering
casing phase change materials
quasi dynamic simplified model
heat transfer characteristics
parameter identification
computational efficiency
