Simulation of Frost Formation Mechanism on Cold Surface in Molecular Dynamics Method
李一Ll Yi;李艳霞LI Yan-xia;刘中良LIU Zhong-liang;
于凤娇YU Feng-jiao;王振强WANG Zhen-qiang
(北京工业大学传热强化与过程节能教育部重点实验室暨传热与能源利用北京市重点实验室,北京100124)
(MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation & Beijing Key Laboratory of Heat 'Transfer and Energy
Conversion, Beijing University of Technology , Beijing 100124,China )
摘要:蒸发器表面结霜会降低空调、冰箱等制冷设备的运行效率,增加系统的能耗。然而,结霜机理尚不完全清楚.本文利用分子动力学模拟方法建立了竖直冷表面的结霜物理模型,观察了水分子的结霜过程,并初步研究了冷表面温度对水分子结霜过程的影响。结果表明:当冷表面温度高于-90℃时,水分子结霜量随着冷表面温度的降低而增加;冷表面温度低于-110℃时,水分子结霜量随着冷表面温度的降低而降低。
Abstract:Frost formation on the surface of evaporator can reduce the operation efficiency of refrigeration equipment,such as airconditioning and refrigerator, and increase the energy consumption of the system.However, the frostimg mechanism is not completely clear.ln this paper, the frost formation model on a vertical cold surface is established by using molecular dynamics method. The frost formationpmocess of water molecules was observed, and the effect of cold surface temperature on the frosting process of water molecules ispreliminarily studied. The results show that when the cold suface temperature is higher than -9O0C℃, the amount of water molecules icingincreases with the decrease of the cold surface temperature. When the cold surface temperature is lower than -110℃C, the amount of watermolecules icing decreases with the decrease of the cold surface temperature.
关键词:分子动力学模拟;结霜机制;冷表面温度
Key words: molecular dynamics simulation; frosting mechanism; cold surface temperature
价值工程-文章出处：李一,李艳霞,刘中良,等.冷表面水分子结霜机理的分子动力学模拟研究[J].价值工程,2023,42(22):111-113. |
