TY - JOUR AU - Bhattarai, Niroj AU - Chalaugain, Raj Kumar PY - 2022/11/18 Y2 - 2024/03/29 TI - Simulation of screw runner for cylindrical basin of gravitational water vortex power plant (GWVPP) JF - Journal of Innovations in Engineering Education JA - Jnl Innov. Engin. Educ. VL - 5 IS - 1 SE - Articles DO - 10.3126/jiee.v5i1.47635 UR - https://www.nepjol.info/index.php/jiee/article/view/47635 SP - 124-133 AB - <p><span dir="ltr" style="left: 383.248px; top: 464.251px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.936046);" role="presentation">Gravitational water vortex plant is an emerging technology to extract energy created from </span><span dir="ltr" style="left: 382.917px; top: 480.026px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.907171);" role="presentation">vortex formation in ultra-low head range. This research was conducted to test a modification </span><span dir="ltr" style="left: 383.248px; top: 495.8px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.895533);" role="presentation">in Archimedes screw as a new type of runner for Gravitational water vortex plant, considering </span><span dir="ltr" style="left: 383.248px; top: 511.575px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.954815);" role="presentation">atmospheric opening at the topmost surface of the channel. After CFD optimization, the </span><span dir="ltr" style="left: 383.248px; top: 527.348px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.92158);" role="presentation">optimum dimension for screw runner was found to have 2 blades, 267 mm height, 180 mm </span><span dir="ltr" style="left: 383.248px; top: 543.123px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.895567);" role="presentation">radius from center axis, 160 mm pitch and is positioned 235.5 mm from the top surface of the </span><span dir="ltr" style="left: 383.248px; top: 558.896px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.906417);" role="presentation">gravitational water vortex basin. Runners with blade number two and three were found to be </span><span dir="ltr" style="left: 383.248px; top: 574.671px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.897479);" role="presentation">more efficient than single and four blade runners. Out of all runners, the efficiency and output </span><span dir="ltr" style="left: 383.248px; top: 590.445px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.898649);" role="presentation">power of the two-blade screw runner was found to be a maximum of 4.07 % and 1.004 Watts </span><span dir="ltr" style="left: 383.248px; top: 606.22px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.895561);" role="presentation">respectively at 55 rpm. Further analysis of the optimized runner was done by varying the inlet </span><span dir="ltr" style="left: 383.248px; top: 621.993px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.898339);" role="presentation">speed of the water at the canal from 0.25 m/s to 0.75 m/s and found that efficiency increased </span><span dir="ltr" style="left: 382.77px; top: 637.768px; font-size: 13.2835px; font-family: sans-serif; transform: scaleX(0.911869);" role="presentation">with increasing inlet speed.</span></p> ER -