TY - JOUR
TI - Effects of different coatings on thermal stress of solar parabolic trough collector absorber in direct steam generation systems
AU - Razmmand Farhad
AU - Mehdipour Ramin
JN - Thermal Science
PY - 2019
VL - 23
IS - 2
SP - 727
EP - 738
PT - Article
AB - Today, solar parabolic trough collectors are the most appropriate 6  technologies in solar power generation due to higher efficiencies in  comparison 7 with other collector types. In this paper, a numerical heat  transfer model is 8 considered, for simulation of this equipment. The inlet  heat flux to the absorber 9 is calculated to be considered as a boundary  condition for the external surface 10 of the absorber. Temperature  distribution on the absorber is obtained, by the 11 aid of energy  equilibrium modeling. Thereupon, thermal and pressure stress at 12 absorber  are analyzed in the model by thermal results and finite element 13 methods.  In this study, the direct steam generation system is used as the basis 14  for the work. High thermal stress is a defect in direct steam generation  systems. 15 In this research thermal performance is improved and stress  tolerance can 16 be increased by using the coating on absorber surface. At  the end, the most 17 suitable coating is introduced among the variety of  considered coatings 18 types.