Enhancement of heat transfer in adsorption bed of vacuum-tube with fins
Enhancement of heat transfer in adsorption bed of vacuum-tube with fins
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DOI：
10.1016/j.applthermaleng.2019.03.005
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发表时间：
2019-05
影响因子：
6.4
通讯作者：
Yuan Li;L. Wang;Z. X. Yuan;Q. F. Chen
中科院分区：
文献类型：
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作者：
Yuan Li;L. Wang;Z. X. Yuan;Q. F. Chen
为了改善太阳能吸附冷却系统中吸附床的传热性能，以SAPO-34沸石-水为工质对，对翅片吸附床进行了实验研究。在无风和阳光明媚的天气条件下，在给定固定翅片高度和翅片厚度的情况下，研究了翅片数量从2到8变化的不同情况下的系统性能。实验结果表明，随着翅片数量的增加，不仅系统的冷却能力明显提高，系统的性能系数（COP）和比冷却功率（SCP）也明显提高。由于插入翅片的传热增强作用，解吸过程后的床层冷却时间大大缩短。尽管在翅片增强的情况下，预热和解吸过程中的太阳能输入有所增加，但循环性能的综合结果显示是有利可图的。
To improve the heat transfer in the adsorption bed that was applied in a solar adsorption cooling system, an experimental study was conducted on the finned adsorption bed with the SAPO-34 zeolite–water as the working pair. In windless and sunny weather conditions, the performance of the system was investigated for different cases of the fin number changing from 2 to 8, given a fixed fin height and fin thickness. The experimental results revealed that not only the cooling capacity, but also the coefficient of the performance (COP) as well as the specific cooling power (SCP) of the system, were improved obviously with the increment of the fin number. With the heat transfer enhancing effect of the inserted fins, the bed cooling time following the desorption process was greatly reduced. Although the solar energy input in the preheating and the desorption process was increased for the fin-enhancing cases, the comprehensive result of the cycle performance was revealed to be profitable.