Heat transfer performance investigation on a finned tube adsorbent bed with a compound parabolic concentrator (CPC) for solar adsorption refrigeration
Heat transfer performance investigation on a finned tube adsorbent bed with a compound parabolic concentrator (CPC) for solar adsorption refrigeration
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太阳能吸附制冷用复合抛物面聚光器 (CPC) 翅片管吸附床传热性能研究
DOI：
10.1016/j.applthermaleng.2019.02.063
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发表时间：
2019-04
影响因子：
6.4
通讯作者：
Wenping Du
中科院分区：
文献类型：
--
作者：
Chong Zhao;Yunfeng Wang;Ming Li;Wenping Du
研究了以活性炭-甲醇为工作对的太阳能吸附制冷系统。活性炭的导热性很差，导致系统性能延迟。为了提高吸附剂床的传热性能，利用商业计算流体力学（CFD）软件对一种新型翅片管吸附床进行了设计和研究。建立了两种吸附剂管（翅片管和光滑管）的二维数值模型，并进行了数值模拟。两种不同的二维数值模型具有相似的单元数、相同的边界和初始条件。对所设计的翅片管进行了网格验证模型实验，并通过数值与实验结果的对比对模型进行了验证。此外，本文还对新设计的翅片管和光滑管的热性能进行了比较。等等加热过程中，活性炭在光滑管和翅片管中的温度梯度分别约为28.1 °C和4 °C。综上所述，翅片对SAR的热性能影响较大，等压加热过程中，甲醇被翅片管中低温部分的活性炭再次吸附的可能性大大降低。此外，翅片管壁的径向热损失也小于光滑管，这可能是有效提高系统性能的重要因素。
In this work, activated carbon-methanol was used as the working pair in a solar adsorption refrigeration system (SAR). The thermal conductivity of the activated carbon was very poor, resulting in performance delays of the system. To improve the performance of the heat transfer for the adsorbent bed, a new adsorbent bed with finned tubes was designed and studied using commercial computational fluid dynamics (CFD) software. Two-dimensional (2D) numerical models of two kinds of adsorbent tubes (finned and smooth tubes) were constructed and simulated. The two different 2D numerical models had similar cell numbers and the same boundaries and initial conditions. An experiment for a grid verification model of the designed finned tube was conducted, and the model of the finned tube was validated via comparison between the numerical and experimental results. In addition, the heat performances of the newly designed finned tube and the smooth tube were compared in this paper. The temperature gradients of the activated carbon in the smooth and finned tubes were approximately 28.1 °C and 4 °C during isosteric heating, respectively. The conclusions are that the fins had a large effect on the thermal performance of SAR, and the possibility that the methanol was adsorbed again by the activated carbon of the lower temperature part in the finned tubes during isobaric heating was decreased greatly. Moreover, the radial heat loss of the finned tube wall was also less than the smooth tube, which may be an important factor for improving the performance of the system effectively.
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DOI：
10.1016/j.ijrefrig.2004.09.004
发表时间：
2005-03
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
Yuyang Liu;Ruzhu Wang;Z. Xia
通讯作者：
Yuyang Liu;Ruzhu Wang;Z. Xia
DOI：
10.1016/j.ijrefrig.2011.05.020
发表时间：
2012-05
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
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Q. Wang;X. Gao;J. Y. Xu;A. Maiga;Guangming Chen
DOI：
10.1002/(sici)1099-114x(199809)22:11
发表时间：
1998-09
影响因子：
4.6
作者：
Ruzhu Wang;Y. Xu;J. Wu;Wen Wang
通讯作者：
Ruzhu Wang;Y. Xu;J. Wu;Wen Wang
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：
Katja Bachmeier
影响因子：
6.4
作者：
Ruzhu Wang;J. Wu;Yu Xu;Y. Teng;Wantao Shi
通讯作者：
Ruzhu Wang;J. Wu;Yu Xu;Y. Teng;Wantao Shi