Etude sur l'amélioration du transfert de chaleur et de masse sur un refroidisseur évaporatif indirect tubulaire.

With possession of indirect evaporative cooler for study, how to develop and study the low-energy consumption and high effective indirect evaporative cooler is discussed. In this paper, the heat exchange performance of the indirect evaporative cooler has been carried out in a theoretical and experimental study, starting with: coating superabsorbent water fiber materials out of pipes and setting up a secondary water distribution grid; inserting spring wire etc. to strengthen heat and mass transfer. The study results showed: tube-type indirect evaporative cooler in tube coated with superabsorbent water fibers, efficiency gains of 5-8%; installing secondary water distribution grid, can improve cooling efficiency 5-10%; after spring wire inserted in the tube, 20-30% increase cooling efficiency. Only the primary airflow resistance in the pipe is increased by about 5-10%. Under the premise of ensuring the cooling efficiency, the use of tube-type indirect evaporative cooler compared plate indirect evaporative cooler, around 50 to 75% of the cost can be reduced. So, a conclusion can be drawn that the optimal design of reinforced tubular heat and mass transfer indirect evaporative cooler can overcome a lot of insufficient which plate indirect evaporative cooler has, example: easily plug flow, water distribution is uneven, wetting ability is bad, these impact cooling efficiency and higher unit volume and cost. So tube-type indirect evaporative cooler is the core equipment in cooling systems and has broad application prospects.