a mixed solar dryer with a specific mechanism to vary the tilted angle of collector, is utilized to fulfill all tests. the efficiency of the dryers is low because of various reasons such as heat loss of air in an open flow circuit. getting air back toward the air inlet of dryer can increase the efficiency of dryer and decrease drying process period. a new mechanism considered for dryer which co...

The Florida Solar Energy Center (FSEC), with the support of the National Renewable Energy Laboratory (NREL), has investigated the thermal performance of solar absorbers which are an integral yet indistinguishable part of a building’s roof. The first roof-integrated solar absorber (RISA) system was retrofitted into FSEC’S Flexible Roof Facility in Cocoa, Florida in September 1998. This “proof-of...

In this study, the exergy efficiency of a flat plate solar collector using Al2O3, TiO2, CuO nanoparticles and pure water as base fluid is studied. Solar radiation is selected between 200 to 600 W/m2. The method to determine optimum values of optimization variables has been developed by Genetic Algorithm Toolbox in MATLAB software. Results show by increasing solar radiation the optimized exergy ...

Solar drying technology has been widely used in engineering fields such us chemical because of its low cost and pollution advantages. In this review, the structural forms, materials coatings heat-absorbing panels flat plate solar air collector are classified, experimental theoretical results performance level panel summarized. indoor tests, energy efficiency is 30% to 79%, applications 28% 62%.

The weakness of the solution flat-air solar collectors in absence a turbulence promoter has led researchers to seek other means improve performance collector. heat exchange air stream from flat collector is creation baffles or obstacles give longest possible flow path and create large network. In this article, we studied an around obstacle field collector, using Ansys CFX calculator software, m...

In this paper, a new solar-heated generation system with capacity of 10kW is designed. The system is based on solar-heated Rankine cycle. The CPC solar energy collector array is used as the main heat source, and the gas boiler as the assistant heat source. The heat storage facility provides heat for put-off 24 hours generating without sun’s radiation. The paper is focused on the analysis of fou...