A Descriptive Review to Access the Most Suitable Rib’s Configuration of Roughness for the Maximum Performance of Solar Air Heater
نویسندگان
چکیده
Solar air heater is considered to be the most popular and widely used solar thermal system. (SAH) can in many applications, ranging from domestic industrial purposes. However, it seems that viability of SAH not feasible due following two reasons: (i) low convective heat transfer coefficient at absorber plate reason causes a rate flowing air, (ii) high temperature insists on losses, thus, reducing efficiency. The augmented by placing turbulators/roughness plate, which induces turbulence flow passage near disrupting destabilizing laminar sublayer. This comprehensive review has been presented summarize studies artificial roughness/turbulators geometries enhance rate. Various rib configurations (such as grits, grooves, blockages, baffles, winglets, protrusions, twisted taps, dimples, mesh wires) distinct arrangements roughness inclined, transverse, V shape, with gap) have reviewed present friction characteristics. Additionally, efficiency thermohydraulic (in terms net effective efficiency) various roughnesses are under operating conditions for comparing comparative study assess desirable ribs their configurations. On basis efficiency, multiarc gaps found best configuration among all highest around 79%.
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ژورنال
عنوان ژورنال: Energies
سال: 2022
ISSN: ['1996-1073']
DOI: https://doi.org/10.3390/en15082800