Dynamic thermal performance prediction model for the flat-plate solar collectors based on the two-node lumped heat capacitance method
Dynamic thermal performance prediction model for the flat-plate solar collectors based on the two-node lumped heat capacitance method
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基于两节点集总热容法的平板太阳能集热器动态热性能预测模型
DOI：
10.1016/j.solener.2016.06.060
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发表时间：
2016-10
期刊：
影响因子：
6.7
通讯作者：
Yang Xudong
中科院分区：
文献类型：
--
作者：
Deng Jie;Ma Rongjiang;Yuan Guofeng;Chang Chun;Yang Xudong
严格根据集热器流动效率因子F '的概念，导出了平板集热器的两节点集总热容模型。结果表明，得到的一阶微分模型是修正的准动力试验模型。参考自动控制理论中的一阶响应系统，辨识出集热器动态响应时间常数τ（d）。然后在修正的QDT模型的基础上，采用小时间区间内的积分处理，推导出平板太阳能集热器的动态热性能预测模型，以扩展热惯性修正模型（TICM），使其适用于集热器入口温度变化率中等或剧烈、漫辐射与总辐射比值变化范围较大、阐明了所提出的预测模型与基于平板太阳集热器稳态试验（SST）的TICM之间的相关性，阐述了集热器动态响应时间常数τ（d）与静态时间常数τ（c）之间的关系。最后，对一个具体的平板式太阳能空气集热器进行了稳态和动态实验测试，验证了所提出的动态预测模型和相应参数的性能。结果表明，基于集热器动态响应时间常数τ（d）的预测模型能够准确预测不同工况下平板太阳能空气集热器的动态热性能。
Two-node lumped heat capacitance model of the flat-plate solar collectors is derived strictly based on the concept of the collector flow efficiency factor F'. It is found that the obtained first-order differential model turns out to be the amended quasi-dynamic test (QDT) model. The collector dynamic response time constant tau(d) is identified referring to the first-order response system in automatic control theory. Then the dynamic thermal performance prediction model for the flat-plate solar collectors on the basis of the amended QDT model is deduced using integral treatment within a small time interval in order to extend the thermal inertia correction model (TICM) to be fit for different conditions, such as moderate or intensive change rates of the collector inlet temperature, wide-range ratios of the diffuse radiation to global radiation, different incidence angles, etc. Correlation between the presented prediction model and the TICM base on the steady-state test (SST) for the flat-plate solar collectors is elucidated and the relation between the collector dynamic response time constant tau(d) and the static time constant tau(c) is elaborated. Finally, experimental tests of both the steady-state tests and dynamic tests with a specific flat-plate solar air collector are conducted to verify the performance of the proposed dynamic prediction model and corresponding parameters. It is verified that the presented prediction model in terms of the collector dynamic response time constant tau(d) can accurately predict the dynamic thermal performances of the flat-plate solar air collector under different conditions.
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DOI：
10.1016/j.egypro.2012.11.148
发表时间：
2014-06
期刊：
Energy Procedia
影响因子：
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