【摘要】：本文建立了均相流模型,對(duì)四種制冷劑重力再循環(huán)蒸發(fā)器進(jìn)行理論分析,并搭建重力再循環(huán)制冷系統(tǒng)實(shí)驗(yàn)臺(tái),在不同工況下對(duì)比了實(shí)驗(yàn)結(jié)果與理論計(jì)算結(jié)果。以R404A為例,當(dāng)保溫體內(nèi)空氣溫度從0℃下降到-25℃時(shí),傳熱系數(shù)的理論值與實(shí)驗(yàn)值的偏差從15.91%逐漸減小到3.01%,制冷量的理論值與實(shí)驗(yàn)值的偏差從14.43%逐漸減小到2.07%。保溫體內(nèi)空氣溫度越低,偏差的幅度越小,重力再循環(huán)制冷系統(tǒng)的運(yùn)行狀態(tài)和理論運(yùn)行狀態(tài)較吻合。應(yīng)用該模型對(duì)四種制冷劑運(yùn)行狀態(tài)進(jìn)行預(yù)測(cè),預(yù)測(cè)結(jié)果表明:相比于其他三種制冷劑,當(dāng)液柱高度較低時(shí),R410A的傳熱系數(shù)和制冷量最大。
[Abstract]:In this paper, the homogeneous flow model is established, the gravity recirculation evaporators of four refrigerants are analyzed theoretically, and the experimental platform of gravity recirculation refrigeration system is built. The experimental results are compared with the theoretical calculation results under different working conditions. Taking R404A as an example, when the air temperature in the heat preservation body decreases from 0 鈩，

本文編號(hào)：2476243