Compound parabolic concentrators (CPCs) are technologies that allow heat exchange between solar radiation and a fluid. Incorporation of a concentric tube receiver has been proposed as a means of improving the performance of CPCs. Such geometry has been used to improve the processes of heat transfer in refrigeration tubes. Here, the authors report mathematical modeling, simulation, design, and construction of four CPCs with concentric tube receivers, as well as experimental study. The study begins with the proposal of a mathematical model based on heat transfer equations, as reported in the literature. Subsequently, the authors designed and built a test bank consisting of four CPCs. The test bank can be operated with the four CPCs, working as either a serial or parallel flow. Based on experimental results, it was possible to obtain the characteristic curves of the solar collector operating in both modes. After validating the mathematical model with the experimental results, a correlation to adjust ...