Experimental and Theoretical Study of Parabolic Trough Solar Collector Performance Without Automatic Tracking System

In this research, a practical and theoretical study was conducted to evaluate the performance of parabolic trough collectors (PTCS) length (3 m) width (2.67 for three solar connected in parallel, absorber tube is made stainless steel with an internal external diameter (0.028 m), (0.031 respectively. The 11 m, painted un shiny black paint increase absorption sunlight reduces thermal radiation. working fluid transferred through receiver located at focus area collectors. collector aperture 0.8 meters, 2.40 meters rim angle Ø = 90°, concentration ratio 8.02. surface covered aluminum foil which available local market (3M SA-85), covers galvanized iron sheets thickness 2 mm. A computer program Fortran language built calculate collector. Experimental results test showed that factor less than typical type, where notes there large deviation between experimental results, especially winter, morning ten o'clock about 78%, while it 5% noon. value mentioned resulting from assumptions have been developed simplify equations were used side also reasons are taken on assumption weather conditions clear sky contrary reality winter. ةThe best efficiency time (12:00) (1:00) night two seasons, obtained mass flow rate amount (0.033) kg/sec (0.066) increases collector, but leads reduce temperature difference inlet exit, as well flux useful energy