Characterization of liquid behavior in distributor of falling-film evaporator

Recently, the development of environmentally friendly refrigerants has emerged as a major issue in industry. Owing to high cost developing new refrigerants, falling-film evaporators are attracting increasing interest, given their reduced refrigerant usage compared with flooded evaporators. In falling–film evaporators, distributor at top evaporator uniformly delivers through multiple holes over heat transfer tubes. We focus on liquid (refrigerant) behavior evaporator. To understand underlying mechanism, we perform experiments single hole well distributor. For both cases, have derived theories that predict height distributor, according flow rate. They show good agreement experimental measurements. By changing diameter, number holes, and rate, quantitatively characterize parametric dependencies determine behavior. addition, unveil negative effect supply stream from upper locally mitigates outflow rate