摘要
水合物相变潜热值大、相变温度适宜,稳定性强,是替代传统蓄冷技术的一种重要蓄冷介质。二元水合物能够解决单一水合物相平衡无法调控、相变潜热低、成核不稳定等关键问题,但是目前二元水合物协同成核生长机制及蓄冷性能尚不明确。基于此,本文针对R134a和TBAB二元水合物进行了二元水合物成核生长、强化生成规律研究,重点探明不同工况下二元水合物的蓄冷特性。研究表明,TBAB水合物成核生成时会带动R134a水合物的生成,TBAB以水合物种子的形式存在。在沸腾-冷凝强化水合物成核生长的过程中,水合物的生成速度明显增加,R134a气体消耗量超过80%,水合物的诱导时间缩减率达到60%。与此同时,TBAB+R134a二元水合物的蓄冷密度达到81.86 kW·h/m^(3),比单一水合物的蓄冷密度提升30%以上,协同强化性能显著。通过对二元水合物的成核生长及强化生成进行分析研究,为水合物蓄冷技术提供了重要的研究方向及理论支撑。
Hydrate is an important cold storage medium to replace traditional cold storage technology because of its high latent heat value,suitable temperature and strong stability.Binary hydrate can solve the key problems such as unregulated phase balance,low latent heat of phase transition and unstable nucleation of single hydrate,but the mechanism of cooperative nucleation growth and cold storage performance of binary hydrate are still unclear.Based on this,this paper studied the nucleation growth and strengthening formation laws of dual hydrates R134a and TBAB,focusing on the cold storage characteristics of dual hydrates under different working conditions.Studies have shown that the nucleation of TBAB hydrate drives the formation of R134a hydrate,and TBAB exists in the form of hydrate seeds.In the process of boiling and condensation enhancement of hydrate nucleation growth,the hydrate formation rate increases significantly,the gas consumption of R134a exceeds 80%,and the induction time reduction rate of hydrate reaches 60%.At the same time,the cold storage density of TBAB+R134a binary hydrate reaches 81.86 kW·h/m^(3),which is more than 30%higher than that of single hydrate,and the synergistic strengthening performance is remarkable.By analyzing the nucleation growth and strengthening formation of binary hydrate,it provides an important research direction and theoretical support for the hydrate cold storage technology.
作者
张玉
张潜浩
李子阳
叶清平
侯一飞
张皓杰
贺弘晋
Zhang Yu;Zhang Qianhao;Li Ziyang;Ye Qingping;Hou Yifei;Zhang Haojie;He Hongjin(College of New Energy,Zhengzhou University of Light Industry,He'nan,450002)
出处
《当代化工研究》
CAS
2024年第15期36-39,共4页
Modern Chemical Research
基金
河南省高等院校科技创新人才项目“微纳米气泡联合超声波强化水合物相变成核及快速生长机制及应用”(项目编号:23HASTIT017)。
关键词
二元水合物
蓄冷
成核生成
沸腾冷凝
binary hydrate
cold storage
nucleation
boiling condensation
