节流装置对压缩式CO_(2)水合物蓄冷系统的优化研究  

Optimization of compressed CO_(2) hydrate storage system by throttling device

作　　者：俞秀娟 谢应明[1,2] 杨振 郭郁 谢梅萍 杨亮 豆斌林[1,2] YU Xiujuan;XIE Yingming;YANG Zhen;GUO Yu;XIE Meiping;YANG Liang;DOU Binlin(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点试验室,上海200093

出　　处：《流体机械》2024年第10期8-15,共8页Fluid Machinery

基　　金：国家自然科学基金项目(50806050)。

摘　　要：为了研究在水冷压缩式CO_(2)水合物蓄冷系统中,电子膨胀阀过热度设定值对系统蓄冷特性的影响。在不同充注压力下(3.6,3.8,4.0,4.2 MPa),通过电子膨胀阀对吸气过热度进行精确控制,分析了过热度设定值(14,16,18,20℃)对系统蓄冷特性的影响,并使用Matlab对系统进行仿真与优化。结果表明,保持充注压力不变,减小吸气过热度以及保持吸气过热度不变,增大充注压力,均会使系统的蓄冷特性得到强化;当充注压力为4.2 MPa、吸气过热度为14℃时,系统的蓄冷特性最好,即蓄冷时间最短(11.3 min),平均入口干度最低(0.454),水合物的生成质量(4.192 kg)、总蓄冷量(3633.80 kJ)、平均蓄冷速率(5.361 kW)和系统COP(3.53)均最大;在仿真优化后,当吸气过热度从20℃降低至6℃时,水合物的生成质量增加了37.3%,总蓄冷量增加了17.7%,系统COP先增大后减小,当吸气过热度为10℃时,COP达到最高值3.49。研究结果对CO_(2)水合物蓄冷技术的发展具有一定指导意义。To investigate the impact of the superheat set value of the electronic expansion valve on the cold storage characteristics of a water-cooled compression CO_(2) hydrate cold storage system,precise control of the suction superheat was achieved by adjusting the electronic expansion valve at various charging pressures(3.6,3.8,4.0,4.2 MPa),the effects of different superheat set values(14,16,18,20℃)on the cold storage characteristics of the system were analyzed,and the system was simulated and optimized using Matlab.The results show that when maintaining a constant charging pressure,both reducing the suction superheat or increasing the charging pressure while keeping the suction superheat constant would enhance the cold storage characteristics of the system.The system exhibits the best cold storage characteristics when the charging pressure is 4.2 MPa and the suction superheat is 14℃:with the shortest cold storage time(11.3 min),lowest average inlet dryness(0.454),and highest formation mass of hydrate(4.192 kg),highest total cold storage capacity(3633.80 kJ),highest average cold storage rate(5.361 kW),and highest COP(3.53).After simulation optimization,when the suction superheat is reduced from 20℃to 6℃,the formation mass of hydrate is increased by 37.3%and the total cold storage capacity is increased by 17.7%.The COP initially increases and then decreases,and reaches a maximum of 3.49 at a suction superheat of 10℃.The research results provide valuable guidance for the development of CO_(2) hydrate cold storage technology.

关 键 词：CO_(2)水合物 蓄冷 吸气过热度 充注压力 仿真 

分 类 号：TH12[机械工程—机械设计及理论] TB65[一般工业技术—制冷工程]