NOVELTY - The module (1) has a tube (2) that contains a heat transfer medium and has a first and a second section designed to be exposed and unexposed to sunlight. An assembly of fins (8) made of thermally conductive material. The assembly of fins defines two longitudinal passages (4,9) inside the tube. The passages are adjacent in a sectional plane perpendicular to a longitudinal axis of tube. The assembly of fins creates a continuous thermal bridge inside tube from an inner surface portion of a first section of tube to an inner surface portion of a second section of tube.    USE - Solar absorber module for concentrating solar power system.    ADVANTAGE - The presence of fins in a portion of the solar tube allows to locally lower the thermal circumferential gradients. The continuous thermal bridge increases heat conduction inside the tube, and through the thermal bridge, between the section and face of the tube designed to be exposed to the sunlight and the other section or face of the tube designed to be unexposed to the sunlight. The tube is a cold drawn seamless tube, which provides tight tolerances, excellent surface properties, and excellent mechanical properties at high temperature under pressure. The tube is made of iron alloys, hence the compromise between cost and thermomechanical performance are achieved. The tube is made of nickel alloys to have a better mechanical strength and used at higher temperatures. The tube is made of titanium alloys are lighter and enables to reduce the weight of the whole structure. The longitudinal passages of the first group is shifted relative to the longitudinal passages of the second group in the longitudinal axis of the tube, which enables to mix the cold and hot fluid streams along the tube and to improve the reduction of the thermal gradient. The material of the assembly of fins is chosen for fabricability purpose and its compatibility with various heat transfer media with high temperature and pressure. The materials enable to provide low-cost assemblies of fins. The decrease in temperature enables to prevent the deterioration of the selective coating and the tube, which increases their service life. The obtained surface of the tube provides a low roughness and mechanical properties respectively adequate for optical and for mechanical requirement of the application.    DESCRIPTION OF DRAWING(S) - The drawing shows the three-dimensional view of the solar absorber module.    Solar absorber module (1)    Tube (2)    Longitudinal passages (4,9)    Assembly of fins (8)