A thermal hydraulic study of water-steam flow in the absorber tubes of small-sized parabolic trough collectors for industrial process heat applications, and an analysis of the effects of inlet temperature and pressure are presented, considering the impact of different two-phase flow models. It was found that the impact is greatest at low inlet pressures and mass flow rates. The results show the potential of concentrating solar power for supplying a certain percentage of the Mexican industrial heat demand. (C) 2016 Elsevier Ltd. All rights reserved.