Thermal investigation on solar absorber and collector is necessitated for optimizing their utilization in application sectors. Temperature enhancement of fluid, thermal performance and Stagnation temperature are the key parameters and so these parameters are to be absorbed in solar collector applications in connection with supplementary heating of air as hot fluid .The research results showed that the operative temperature of nano cobalt and nano chromium coated absorber varied from 28.6 oC to 31.4 oC.. The research results also showed that the stagnation temperature of the solar collector was 213.4oC and the range of increase of temperature of fluid was from 4.2 to 5.3oC. The observation on research results showed that the instantaneous thermal performance of solar collector ranged between 57.5 and 59.5% for the inlet fluid temperature of 35.9oC. As the thermal performance of the solar collector was directly proportional to operative temperature of solar absorber, it could be concluded that nanocobalt and chromium coated solar absorber would be integrated in solar collector so as to reap improved thermal performances.