Analisis pengembangan hidrokinetik turbin gorlov akibat penambahan luas bidang tangkap

Abstract

The Gorlov turbine is a hydrokinetic turbine technology different from conventional water turbine. It can be mounted vertically or horizontally and also be used in low-head conditions however, it has a frontal area which depends on the curved dimensions of helical blade. Hydrokinetic turbines are used for hydroelectric power plants by converting kinetic energy from river and tidal streams. The DNA turbine is a new type of turbine developed by Gorlov turbine design with the addition of pair components aiming to increase the frontal area ()f A . This study compared performance of Gorlov turbine and DNA turbine. The testing was carried out on a prismatic channel with a flow velocity variation of 0.188 - 0.222 m/s. The effect of increasing frontal area ()f A with the addition of pair components caused a decrease in C and P ? performance on DNA turbine design. Gorlov turbine produced a tip-speed ratio ()? 2.11 - 2.24 and coefficient of power ()P C of 0.26 - 0.30. DNA turbine produced tip-speed ratio ()? of 0.91 - 1.07 and coefficient of power ()P C value of 0.19 - 0.24. The rotation per minute (RPM) values resulting from Gorlov turbine and DNA turbine were 31.1 - 38.1 and 13.0 - 17.6, respectively. Torque ()? of Gorlov turbine and DNA turbine were 0.025 - 0.038 Nm and 0.054 - 0.085 Nm, respectively. The effect of increasing frontal area ()f A with the addition of pair components caused the rotation per minute (RPM) of the DNA turbine to decrease. However, it had an advantage in the resulting torque value. This could be seen from the graphical trend of torque value ()? to the increase in the flow velocity at rotation angles of