DefinePK

Abstract

The purpose of this research is to observe a kinetic turbine with a new design. Kinetic turbine with this new design adopts a cross flow turbine design. As with kinetic turbines in general, kinetic turbines with this new design also only rely on the water flow rate to drive the turbine, which is then converted into electrical energy by utilizing a generator. It is hoped that this Cross Flow Kinetic Turbine can improve the performance of kinetic turbines, which are known to have a low efficiency. The research system conducted is a simulation that utilizes CFD software. This simulation activity is comparing water behavior in a kinetic turbine by observing the water trajectory between the turbine blades. The kinetic turbine that will be compared with the cross flow kinetic turbine (CFKT) is a Curve Bladed Kinetic Turbine (CBKT). The reason for comparing with CBKT, is because the CBKT has been tested experimentally in the fluid mechanics laboratory. So by comparing the water behavior in this case is the water line trajectory, then the CFKT as a turbine with a new design can be predicted whether it has a better performance than the CBKT or not. In this modeling activity, the focus of the observation is on the movement of water velocity in the blade chamber which will produce momentum or thrust. From the results of this test in general, the Cross Flow Kinetic Turbine has a good performance, because the push of water flow occurs on four blades. Namely the push on two blades on the first stage and push on the two blades on the second stage. Whereas on the Curve Bladed Kinetic Turbine only two blades get a boost. Keep in mind that a push on the blade by the speed of the water will produce momentum that represents the thrust on the turbine blade. From the prototype test results for the 5? runner position the water velocity that produces a boost at CFKT is equal to 3,151 m/s in area a, 4,051 m/s in area f, 2,701 m/s in area b and 4,051 m/s in area e. Whereas for the CBKT the water flow velocity is 2.233 in the area a and the water flow velocity in area b is equal to 2.233 m/s. From this result, it can be seen that the CFKT has a better performance than the CBKT. Overall at each runner's position, the momentum generated at the CFKT is greater than the momentum generated at the CBKT.