Experimental study on design and operational performance of solar-powered venturi aeration system developed for aquaculture – A semi-floating prototype

A review: Aeration efficiency of hydraulic structures in diffusing DO in water

“… [72] T L= 20-100mm; θ 1 , θ 2 =10 0 ,15 0 ,20 0 , and 25 0 ; N=1-17 F v = 1.096m/s The maximum SOTR and SAE values obtained were 0.0216 kgO 2 /h and 0.611 kgO 2 /kWh, respectively. With increasing T L and θ 1 , θ 2 the SAE value rapidly increases with N. 5 Dayıoğlu [19] - D= 4.1m 3 h −1 ; E= 263.2 kJ/m3 for D and 380 kJ/Kg for OT The maximum values of SOTR, SAE, and SOTE were 0.206 kgO 2 h −1 , 0.681 kgO 2 kWh −1 , and 7.32%, respectively. Foot Note Table 1 :- Where, R e = Reynolds number; J L = Water jet length; α = Angle between water jet discharge and tank; T D = Throat diameter, T L = Length of throat; θ 1 = Converging cone angle; θ 2 = Diverging cone angle; N D = Diameter of nozzle; F v = Flow velocity of water; N= Number of air holes; D= water flow rate; E=specific energy consumption; OT= oxygen transfer; SOTR= Standard oxygen transfer rate; SAE= Standard aeration efficiency; SOTE= Standard oxygen transfer efficiency …”

A cross‐over experiment for on‐farm evaluation of a novel pond aquaculture aeration device

“…The SUpA effect from Models 1 and 2 can be compared to the Standard Oxygen Transfer Rate (SOTR) of commercially available aeration technologies (eg. Dayıoğlu, 2022; A. Kumar et al, 2013; Rogers et al, 1991; Roy et al, 2021). Optimistically assuming that occurs throughout the full volume of each pond (approximately 200 m 3 ) and that occurs over an average period of 10 h, the Oxygen Transfer Rate (OTR), without correcting for pond water temperature or chemistry, associated with a SUpA effect of 0.257 mg/L (Model 2), is approximately 5 g O 2 /h.…”

“…The SUpA effect from Models 1 and 2 can be compared to the Standard Oxygen Transfer Rate (SOTR) of commercially available aeration technologies (eg. Dayıoğlu, 2022;A. Kumar et al, 2013;Rogers et al, 1991;Roy et al, 2021) F I G U R E 5 Estimated SUpA effect from Table 3, model 4 (green), compared to the estimated effect from analysing the results from each of the three setups as an independent randomized control trial.…”

“…The use of an on‐farm methodology to test an aerator also contrasts with many studies that test aerators in highly controlled laboratory conditions (eg. Ashley et al, 1992; Dayıoğlu, 2022; Roy et al, 2017). While laboratory experiments are useful to define standardized operating efficiencies, real‐world conditions can vary considerably from those in laboratories.…”

“…Sultana The use of an on-farm methodology to test an aerator also contrasts with many studies that test aerators in highly controlled laboratory conditions (eg. Ashley et al, 1992;Dayıoğlu, 2022;Roy et al, 2017).…”