In this investigation, the effect of replacing conventional solar absorber with a new on thermal performance double-pass air heater has been studied experimentally and numerically. Three configurations have introduced, first configuration is double pass flat plate (DPSAHWFP) for aim comparison, second tubular that includes set tubes which are fitted perpendicularly to direction airflow (DPSAHWT...

Solar radiation is harnessed as an alternative energy source for numerous industrial and domestic applications. Currently, apart from space heating, air-conditioning lightning, solar water heating (SWH) systems have a widespread usage applications in both sectors. The major issue with that the transmission efficiency low so heat transfer augmentation methods can be used to improve thermal perfo...

The paper presents preliminary results of an experimental study on solar water heater with full width and 75% twisted tapes as heat transfer enhancement device. The study shows that the thermal efficiency due the use of the twisted tape increases by 4.5-8%; higher for the 75% twisted tape. Keyword Solar water heater (collector), tube-in-fin, twisted tape, thermal efficiency, performance enhance...

Compressed air energy storage (CAES) is a large-scale technology that provides long-duration energy storage. It is promising for balancing the large-scale penetration of intermittent and dispersed sources of power, such as wind and solar power, into electric grids. The existing CAES plants utilize natural gas (NG) as fuel. However, China is rich in coal but is deficient in NG; therefore, a hybr...

CFD analysis of 2-dimensional artificially roughened solar air heater duct with additional circular vortex generator, inserted in inlet section is carried out. Circular transverse ribs on the absorber plate are placed as usual. The analysis is done to investigate the effect of inserting additional vortex generator on the heat transfer and flow friction characteristics inside the solar air heate...

Thermo-hydraulic performance of a Double Pass Parallel Flow Solar Air Heater (DPPFSAH) roughened with perforated multi-V ribs has been studied experimentally in prior study and the effect variation open area ratio change relative roughness width analysed reported. The current work builds upon aforementioned earlier by discussing detail methodology various steps involved development correlation ...