Because of the direct relationship between design parameters and acoustic response, and because of the better numerical efficiency of the baffled duct model as opposed to the Fourier BEM models, the application of the baffled duct model in the design process is viable.
The former probably reflects a relatively slow rate of inter-zonal transfer and the latter reflects the comparatively high flow rate and removal efficiency of the in-duct system.
To assess the efficiency of mixing in ducts, the cross directional contribution of the energy dissipation rate is defined.
In this present work an exergy efficiency of the single pass double duct jet plate solar air heater (SPDDJPSAH) is analytically investigated.
The results show that the application of the WHRB increases the energy efficiency of the whole system, but increases the flow resistance in the duct.
And the thermal efficiency of proposed design duct is observed almost 14% more as compare to the smooth duct.
In the entire range of flow rates, the thermal efficiency of the roughened solar air heater is higher as compared to smooth duct.
The ends of the ducts were plugged.
They reveal that the variation in polytropic efficiency of the primary nozzle has the most important impact on the constant area duct length.
The effective efficiency of the system increases with an addition in the number of glass covers and width of the duct.
