Effect of adsorption process intensification for high-temperature steam generation in adsorption heat pump

被引：0
作者：
Zhang L. [1 ]
Liu Z. [2 ]
Li G. [1 ]
Chen T. [1 ]
Xue B. [1 ]
机构：
[1] School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, Henan
[2] Vatti Co., Ltd., Zhongshan, 528415, Guangdong
来源：
Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 11期
关键词：
Adsorption; Equilibrium; High temperature steam; Mass transfer; Pre-adsorption;
D O I：
10.11949/0438-1157.20190378
中图分类号：
学科分类号：
摘要：
In the open adsorption heat pump system based on direct contact heat transfer method, a pre-adsorption process or a preset mass transfer channel is introduced to investigate its influence on steam generation and system performance. In this paper, experimental working principle of high-temperature steam generation from hot water is described as a comparison. Then cyclic test with pre-adsorption units (saturation temperature=74.0℃ and 89.2℃) and mass transfer channels (branch shape and coiler shape) are conducted. The results show that after adding the pre-adsorption process(saturation temperature=89.2℃), the average temperature of the generated steam is 203 ̊C and GTL (gross temperature lift) of the system is 98.4 ̊C. Steam generation time was 131 s earlier than the comparative experiment, effective time ratio for steam generation is elevated by 52.2% and mass of generated steam is raised by 27.0%. COPh (heating coefficient of performance) and SHPs (specific heating power for steam generation)are improved by 28.2% and 27.2%, respectively. When presetting branch shape channel inside the adsorption bed, effective time ratio for steam generation is elevated by 17.8% and mass of generated steam is raised by 8.75%. COPh and SHPs are increased by 8.16%and 9.05%,respectively.The pre-adsorption process allows the adsorption bed to reach the entire adsorption and thermal equilibrium faster. As a result, the generated high temperature steam arrives the top exit earlier. Besides, the local adsorption equilibrium is promoted on account of the mass transfer channel, which also reduces the local mass transfer resistance and makes a part of generated steam leave the pocked bed quickly. These results indicate that with the rapidly achievement of the entire and local adsorption equilibrium, the dynamic steam generation process is successfully intensified and the system performance is significantly improved. © All Right Reserved.
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页码：4172 / 4180
页数：8
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