The process of direct steam generation was studied in this work
within a parabolic trough solar collector in order to generate
electricity. The study was based on the equations of a two phase
flow to study heat transfer in the collector's tube. Th
e study showed
a possibility to reach an effective model to study the performance of
this type of solar collectors which will aid in the understanding of
the working principle of power plants and to research further
towards new control strategies of solar power plants or towards the
hybridization with other types of power plants.
Direct steam generation in parabolic trough collector (DSGPTC)
has had a great importance because of its thermoeconomic
advantages and many researches have be done in
this field. Due to that reason this paper studies the convection
heat transfer
from absorber tube of a PTC to all phases of
water (liquid water, wet steam and dry steam) along the
whole distance of fixed length of a DSG-PTC generates a high
temperature superheated steam (561 °C). All heat transfer
operations in PTC has been modelled and then the
convection' components which are; fluid temperature, tube
wall-fluid temperatures difference and heat transfer
coefficient have been analyzed in details at different
operation conditions such as inlet fluid pressure, direct solar
beam and mass flow.
