制冷学报2012，Vol.33Issue(2)：55-59,5.DOI:10.3969/j.issn.0253-4339.2012.02.055
供液压头和蒸发温度对再循环蒸发器循环倍率的影响
Effect of the Supply Liquid Pressure Hydraulic Head and Evaporation Temperature on the Circulating Rate of Circulating Evaporator
戴雅静 1臧润清 1李星1
作者信息
- 1. 天津商业大学制冷与空调工程系天津市制冷技术重点实验室 天津300134
- 折叠
摘要
Abstract
For gravity feeding refrigeration system, when the hydraulic head was greater than the resistance to the evaporator, liquid refrigerant can recycle in loop formed by the evaporator and vapor-liquid separator. The strength of recycling was expressed by circulating rate, which was connected with hydraulic head and evaporation temperature. Resistance formulas to a small system were derived and a special recycling evaporator was designed. Resistance balance calculation in homogeneous flow model was completed. Then the effect of hydraulic head and evaporation temperature on the circulating rate of refrigeration system was experimentally investigated using the air-side heat balance method. The results showed the precision can be satisfied with the engineering demand. Cycling rate decreases as evaporation temperature increases, and the lower the evaporation temperature is, the smaller the change of cycling rate. Cycling rate increases as hydraulic head increases, and the augment formed by one unit hydraulic head increases with the decrease of hydraulic head. The changing rate decreases with the increase of evaporation temperaturc and there exists optimal cycling rate which is recommended as 4~5.关键词
热工学/再循环蒸发器/重力供液蒸发器/均相流模型/循环倍率Key words
Pyrology/ Recycling evaporator/ Gravity feeding refrigeration evaporator/ Homogeneous flow model/ Circulating rate
分类
通用工业技术引用本文复制引用
戴雅静,臧润清,李星..供液压头和蒸发温度对再循环蒸发器循环倍率的影响[J].制冷学报,2012,33(2):55-59,5.
