流体机械

2019, v.47;No.563(05) 65-69

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双蒸发管组冷风机重力再循环供液的试验研究
Experimental Study on Gravity-recirculation with Air Cooler of Double Evaporation Tube Groups

马燕;臧润清;张秋玉;
Ma Yan;Zang Runqing;Zhang Qiuyu;Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of commerce,Refrigeration engineering research center of Ministry of Education of P.R.C,Tianjin Refrigeration engineering technology center;

摘要(Abstract):

针对以往重力再循环供液制冷系统的气液分离器放置冷库外部造成冷量损失的问题,设计了带有双蒸发管组冷风机且气液分离器放置内部的重力再循环制冷系统并与直接膨胀制冷系统进行了对比试验,研究不同库温和不同冷凝温度对两种制冷系统的制冷量,压缩机功率等参数影响。结果表明,重力再循环采用双蒸发管组冷风机后,在库温-20,-25,-30℃工况下,相对于直接膨胀制冷系统的性能系数增加8.81%,9.27%和10.51%,在冷凝温度20,30,35℃工况下,相对于直接膨胀式制冷系统的性能系数增加5%~10%,因此带有双蒸发管组冷风机的重力再循环在低温下运行更具有优势。
In view of loss of cooling capacity caused by placing the gas-liquid separator of the traditional gravity-fed recirculation refrigeration system outside of the cold storage,a gravity recirculation refrigeration system with air cooler of double evaporation tube group and gas-liquid separator placed inside was designed and was tested by comparison with the direct expansion refrigeration system in order to study the effects of different cold storage temperatures and condensing temperatures on the refrigerating capacity and compressor power,etc. of these two refrigeration systems. Results show that after the air cooler of the double evaporation tube group was used for the gravity recirculation refrigeration system,at the cold storage temperature of 20 ℃,25 ℃ and 30 ℃,the coefficient of performance relative to the direct expansion refrigeration system was increased by 8.81%,9.27% and 10.51%,respectively,and at the condensing temperature of 20 ℃,30 ℃ and 35 ℃,the coefficient of performance relative to the direct expansion refrigeration system was increased by 5%~10%,so the gravity recirculation refrigeration system with the air cooler of double evaporation tube group has more advantages in the operation at low temperature.

关键词(KeyWords): 重力再循环供液制冷系统;循环倍率;直接膨胀式制冷系统;性能系数
gravity-fed recirculation refrigeration system;circulating rate;direct expansion refrigeration system;COP

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作者(Author): 马燕;臧润清;张秋玉;
Ma Yan;Zang Runqing;Zhang Qiuyu;Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of commerce,Refrigeration engineering research center of Ministry of Education of P.R.C,Tianjin Refrigeration engineering technology center;

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