冷凝器风机变频对制冷系统制冷剂流量的影响  

Effect of Condenser Fan Frequency Conversion on Refrigerant Flow Rate of a Refrigerating System

作　　者：施灵 马益民 王顺 SHI Ling;MA Yimin;WANG Shun(School of Mechanical and Energy-Engineering,Jimei University,Xiamen 361021,China)

机构地区：[1]集美大学机械与能源工程学院,福建厦门361021

出　　处：《集美大学学报（自然科学版）》2018年第4期293-297,共5页Journal of Jimei University：Natural Science

基　　金：福建省大学生创新创业训练计划项目(201710390061)

摘　　要：为了给制冷剂流量优化控制策略的制定提供方向,以直接膨胀式冷库制冷系统为对象,研究了4种库温工况下风冷冷凝器风机变频对制冷剂流量的影响。结果表明:相同库温下,制冷剂质量流量随冷凝器风机频率的升高而增大,且库温越高,流量变化率越大;对于相同的冷凝器风机频率,制冷剂质量流量随库温的降低而减小。应用SPSS软件,建立了质量流量与蒸发压力、蒸发器出口过热度和压缩比的多元线性回归方程。通过比较标准化回归系数值发现:蒸发压力对质量流量影响最大,蒸发器出口过热度影响次之,压缩比影响最小。To provide directional guidance for making optimized refrigerant flow rate control strategies,a direct expansion cold store refrigeration system was taken as the subject investigated to study the effects of air cooled condenser frequency conversion on refrigerant flow rate under four cold store room temperature conditions. Results show that the refrigerant mass flow rate increass with rising fan frequency under the same cold store room temperature,and the higher the room temperature is,the larger the change rate will be. And for the same condenser fan frequency,the refrigerant mass flow rate decreases as well. A multivariate linear regression equation relating refrigerant mass flow rate with evaporating pressure,superheat degree and pressure ratio has been established by SPSS software. Comparison of the standardized regression factors reveals that the evaporating pressure has the greatest impact on refrigerant mass flow rate,followed by the superheat degree,and the pressure ratio ranks the third.

关 键 词：制冷剂流量 风冷冷凝器 变频 冷库 

分 类 号：TB657.1[一般工业技术—制冷工程]