Implementation of a non-equilibrium heat transfer model in stage-stacking scheme to investigate overspray fog cooling in compressors

► A non-equilibrium droplet evaporation model was developed. ► The wet compression in an 8-stage compressor is analyzed using stage-stacking scheme. ► Droplet size plays a major role in affecting the result in the non-equilibrium analysis. ► For small droplets, the results are closed to the equilibrium method. ► Larger droplets lead to less effective compressor performance. ► All droplets completely evaporate in the compressor except the droplets larger than 30 μms.