Mohammad Saadatbakhsh - Assistant Professor, Mechanical Engineering Department, Kharazmi University Visiting Professor, School of Advanced Technologies, Iran University of Science and University, Tehran, Iran
Fallah Mahmoudi Surman Abad - M.Sc. Student, Mechanical Engineering Department, Kharazmi University, University, Tehran, Iran
Hooman Nowroozlou - M.Sc. Student, Mechanical Engineering Department, Kharazmi University, University, Tehran, Iran
Kasra Habibi - B.Sc. Student, Mechanical Engineering Department, Kharazmi University, University, Tehran, Iran

One of the methods to decrease the temperature of superheated steam is by injecting cooling water using a desuperheater, the evaporation of the droplets leads to a reduction in superheated steam’s temperature. In this study, a desuperheater model with the injection of cooling water against the direction of the superheated steam flow after a static mixing element and another model without the static mixer are simulated by using the discrete phase model (DPM) and implementing the lagrangian-eulerian approach. Heat and mass transfer between water droplets and superheated steam is simulated as a two-phase ۳D flow in ANSYS FLUENT by considering the standard k-ε turbulence model. The effect of the static mixer on droplet evaporation is studied, the results indicate that the presence of a static mixer leads to an increase in mixture between the injected droplets and superheated steam and this phenomenon improves the heat transfer and increases the evaporation rate.

Desuperheater, Structural innovation, Numerical simulation, DPM, Thermal desalination