文献类型：期刊文献

英文题名：Fast prediction of non-uniform temperature distribution: A concise expression and reliability analysis

作者：Shao, Xiaoliang[1];Ma, Xiaojun[3];Li, Xianting[2];Liang, Chao[2]

第一作者：Shao, Xiaoliang

通讯作者：Li, XT[1]

机构：[1]Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China;[2]Tsinghua Univ, Sch Architecture, Dept Bldg Sci, Beijing 100084, Peoples R China;[3]Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China

第一机构：Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China

通讯机构：[1]corresponding author), Tsinghua Univ, Sch Architecture, Dept Bldg Sci, Beijing 100084, Peoples R China.

年份：2017

卷号：141

起止页码：295-307

外文期刊名：ENERGY AND BUILDINGS

收录：;EI(收录号：20171003416162);Scopus(收录号：2-s2.0-85014228248);WOS:【SCI-EXPANDED(收录号:WOS:000400212400025)】；

基金：This study is supported by the National Natural Science Foundation of China (Grant No. 51508299 and 51578065), Fundamental Research Funds for the Central Universities (Grant No. FRF-TP-16006A1) and the State Sports General Administration Foundation of Key Research Field (Grant No. 2014B095).

语种：英文

外文关键词：Ventilation; Fast prediction; Temperature distribution; Simulation; Prediction deviation

摘要：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. (C) 2017 Elsevier B.V. All rights reserved.