本文選題：再循環(huán)蒸發(fā)器 + 不同管徑　； 參考：《低溫與超導》2017年05期

【摘要】：建立均相流模型,對不同管徑重力再循環(huán)蒸發(fā)器進行理論分析,并搭建重力再循環(huán)制冷系統試驗臺,在不同工況下進行對比。以R404A為例,在保溫體內空氣溫度從0℃下降到-25℃情況下,16mm管徑蒸發(fā)器傳熱系數從31.4W/m~2·K減少到27.9W/m~2·K,12mm管徑蒸發(fā)器傳熱系數從27.2W/m~2·K減少到17.7W/m~2·K;16mm管徑蒸發(fā)器制冷量從3.11k W升高到4.33k W,12mm管徑蒸發(fā)器制冷量從2.01k W升高到4.62k W,兩者的偏差從33.6%降低到-6.7%,庫內溫度越低,兩者制冷量差距越大。對比結果表明,在低溫工況下16mm管徑的蒸發(fā)器相比12mm管徑的蒸發(fā)器更適合重力再循環(huán)蒸發(fā)器。
[Abstract]:A homogeneous phase flow model was established to analyze the gravity recirculation evaporator with different diameter theoretically. The test bench of gravity recirculation refrigeration system was built and compared under different working conditions. Take R404A, for example, The heat transfer coefficient of 16mm tube diameter evaporator decreases from 31.4W/m~2 K to 27.9W/m~2 K 12mm tube diameter evaporator from 0 鈩，

本文編號：1949182