Constructal design for supercharged boiler superheater
Constructal design for supercharged boiler superheater
复制标题
增压锅炉过热器结构设计
DOI：
10.1016/j.energy.2019.116484
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发表时间：
2020-01-15
期刊：
影响因子：
9
通讯作者：
Xia, Shaojun
中科院分区：
文献类型：
--
作者：
Feng, Huijun;Xie, Zhuojun;Xia, Shaojun
在保证总换热面积不变的前提下，对SB过热器进行结构设计，以实现其性能的提高。以SB过热器的传热量和耗电量组成的复变函数（CF）为优化目标，分别对管外径（TOD）、管排数（NTPR）和管排数（NTR）进行了优化。得到了SB过热器的最佳结构和相应的最佳性能。研究了保温系数、过量空气系数和燃油消耗率对优化结果的影响。研究结果表明，与初始性能相比，对TOD、NTPR和NTR进行一次优化后，CFs分别降低了2.6%、0.9%和2.6%。CF可以分别通过双重和三重优化进一步降低。增加HPC、ECA和FCR都可以提高锅炉过热器的整体性能。权重系数对优化结果有定量和定性的影响。本文的研究结果可为不同SB过热器的结构设计提供理论依据。(C)2019爱思唯尔有限公司版权所有。
Constructal design of a SB superheater is carried out under the prerequisite of fixed total heat exchange area to realize its performance improvement. A complex function (CF) which consists of the heat transfer rate and power consumption of the SB superheater is considered as the optimization objective, and the tube outer diameter (TOD), number of tubes per row (NTPR) and number of the tube rows (NTR) are optimized, respectively. The optimal construct and corresponding optimal performance of the SB superheater are obtained. The influences of the heat preservation coefficient (HPC), excess air coefficient (ECA) and fuel consumption rate (FCR) on the optimization results are investigated. The research results indicate that compared with the initial performances of the superheater, the CFs after primary optimizations for the variables of TOD, NTPR and NTR are reduced by 2.6%, 0.9% and 2.6%, respectively. The CF can be further reduced by double and triple optimizations, respectively. Augmenting the HPC, ECA and FCR can all boost the overall performance of the boiler superheater. The weight coefficient has both quantitative and qualitative effects on the optimal results. The research results gained from this paper can be of theoretical assistances to the structure designs of different SB superheaters. (C) 2019 Elsevier Ltd. All rights reserved.