Near-wall thermal regulation for cryogenic storage by adsorbent coating: Modelling and pore-scale investigation
Near-wall thermal regulation for cryogenic storage by adsorbent coating: Modelling and pore-scale investigation
复制标题
通过吸附剂涂层进行低温储存的近壁热调节：建模和孔隙尺度研究
DOI：
10.1016/j.apenergy.2023.121634
复制
发表时间：
2023
期刊：
影响因子：
11.2
通讯作者：
Hong
中科院分区：
文献类型：
--
作者：
Zhongdi Duan;Jianhu Wang;Yuchao Yuan;Wenyong Tang;Hong
液化天然气的低温储存容易受到环境热流入的影响，这对储存安全和效率产生不利影响。尽管配备了保冷系统来减少热量泄漏，但为了防寒，仍然需要采取再液化、再冷却等主动热管理措施，这需要补充电源，并且处理热侵入事件的能力有限。本文提出了一种利用吸附剂涂层抑制近壁温度升高的低温储存被动自适应热调节方法。采用格子玻尔兹曼与有限差分相结合的方法建立介观模型，用于评价低温吸附/解吸性能和热调节效果。通过引入等温吸附、界面传质和传热以及颗粒内扩散的子模型，预测了 LNG 储存条件下的孔隙尺度吸附动力学和温度瞬态。分析表明，吸附剂涂层显着减轻并延长了热流入下蒸发气体的温升。在1000 W/m 2 的外部热通量下，气体温升降低了78%，持续时间延长了16.6倍。结果表明，吸附剂涂层对低温LNG储罐的长期热调节具有良好的能力。
Cryogenic storage of liquefied natural gas is susceptible to environmental heat influx, which possesses detrimental effects on storage safety and efficiency. Although cold insulation systems are equipped to mitigate heat leakage, active thermal management measures like re-liquefaction and re-cooling are still imperative for cold prevention, which requires supplementary power supply and has restricted capability to handle heat ingress incidents. In this paper, a passive and self-adaptive thermal regulation approach for cryogenic storage is proposed by utilizing adsorbent coatings to inhibit near-wall temperature elevation. A mesoscopic model is established by the combined lattice Boltzmann and finite difference method for evaluating cryogenic adsorption/desorption performances and the thermal regulation effect. The pore-scale adsorption kinetics and temperature transients under LNG storage conditions are predicted by introducing sub-models of isothermal adsorption, interfacial mass and heat transfer, and intraparticle diffusion. The analysis reveals that the adsorbent coating significantly mitigates and prolongs the boil-off gas temperature rise under heat influx. A reduction of gas temperature rise by 78% and an elongation of the duration by 16.6 times was observed under an external heat flux of 1000 W/m 2. The results indicate that adsorbent coating has a promising capability for thermal regulation of cryogenic LNG tanks over a prolonged period.
影响因子：
4.6
作者：
Zou, QS;He, XY
通讯作者：
He, XY