Author(s)

Zhaoyi Chen, Zhi Liu, Kaiyong Hu

Corresponding Author

Kaiyong Hu

Abstract

Improving a heat exchanger's heat transfer capability is essential for energy conservation. An important factor in promoting heat transfer between hot and cold fluids is the heat exchanger's coil. As a result, increasing the coil's heat transfer capacity is essential to raising the heat exchanger's overall performance. Spray cooling technology is renowned for its superior capacity to transfer heat. This study examines how spray cooling technology can be applied to a serpentine coil and examines how different spray cooling settings affect the coil's heat transfer properties. While faster droplet evaporation rates lead to higher relative humidity at the air outlet—albeit with a thicker liquid film—increasing the spray density can increase the heat flux on the coil's surface. Furthermore, a greater number of nozzles distributes droplets more widely, improving droplet evaporation rates and heat flux on the coil's surface. As a result, the liquid film thickness decreases and relative humidity at the air exit rises.

Keywords

Spray cooling; Number of nozzles; CFD