Fast prediction of non-uniform temperature distribution: A concise expression and reliability analysis
Fast prediction of non-uniform temperature distribution: A concise expression and reliability analysis
复制标题
非均匀温度分布的快速预测：简洁的表达式和可靠性分析
DOI：
10.1016/j.enbuild.2017.02.048
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发表时间：
2017-04
影响因子：
6.7
通讯作者：
Chao Liang
中科院分区：
文献类型：
--
作者：
Xiaoliang Shao;Xiaojun Ma;Xianting Li;Chao Liang
室内温度分布的快速预测对于了解室内温度状况、辅助快速决策和热源控制具有重要意义。基于固定流场假设的叠加预报是实现快速预报的另一种方法。然而，很少有研究揭示基于固定流场的预测方法的可靠性，以往的预测方法主要集中在稳态时的温度。本文根据温度的暂态可及性指标的定义，建立了预测温度分布的代数表达式。主要用数值方法对14个算例的预测精度进行了验证。结果表明：(1)只要预先准备好暂态可及性指标，该表达式即可进行快速预测；(2)该方法所采用的固定流场应由考虑某一强度的热源的热情景建立，而不是无热源的情景。对于热源区以外的位置，预测精度是可以接受的；(3)建立固定流场时送风温度的选择对预测精度没有显著影响。对预测精度的研究有助于该方法在实际工程中的合理应用。
Fast prediction of indoor temperature distribution is valuable to recognize the status and assist in rapid decision making and heat source control. Prediction using a superposition theorem based on the assumption of fixed flow field is an alternative method of performing fast prediction. However, little research revealed the methods’ reliability based on fixed flow field, and previous prediction methods primarily focused on the temperature at a steady state. In this paper, an algebraic expression was established to predict the temperature distribution based on the definition of transient accessibility indices for temperature. The prediction accuracy was mainly verified using a numerical method with 14 cases. It was concluded: (1) the proposed expression can perform fast prediction once the transient accessibility indices are prepared in advance; (2) the fixed flow field adopted in the proposed method should be built by a thermal scenario considering the heat source at a certain intensity, rather than a scenario with no heat source. The accuracy is acceptable for positions outside the heat source area; (3) there is no significant effect of the choice of supply air temperature utilized in building the fixed flow field on prediction accuracy. The research on prediction accuracy is helpful for a reasonable application of the proposed method in real projects.
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影响因子：
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作者：
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影响因子：
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DOI：
10.1201/9781482234213
发表时间：
2016
期刊：
--
影响因子：
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作者：
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通讯作者：
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