Abstract

Utilization of low head flow water has long been used to generate power by using water wheels and low head turbines. Dethridge wheel which is usually used as a tool to measure the flow of water has also been studied its potential to become hydro power generation. Therefore, this study aims to compare performance between overshot Dethridge wheel and undershot Dethridge wheel. For this purpose, a small scale channel for the operation of a water wheel is equipped with a digital flow meter, a pump that has a debit of up to 25 l/s, a pony brake for a torque meter, and an inverter to adjust the flow rate by changing the pump rotation. The research was conducted at Laboratory of Mechanical Engineering, UHAMKA in Jakarta, Indonesia. Flow rates vary from 5 to 11 l/s with head of 10 cm and 537 cm. The efficiency of undershot and overshot, at the peak, are 21% and 18%, respectively.

Highlights

  • Electricity is no longer a luxury for humans but has become a primary need for urban residents it is become different story for villagers that remote and far from the electricity supply provided by State Electricity Company (PLN)

  • To utilize a water flow with very low head, such as in an irrigation stream, the Dethridge wheel, which originally used as a flow measurement, is used for electricity generation with an efficiency of 60% [7] and its performance improves in the channel width that is two to three times greater than the wheel width [8]

  • Water is delivered by the pump through the Dethridge wheel

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Summary

Introduction

Electricity is no longer a luxury for humans but has become a primary need for urban residents it is become different story for villagers that remote and far from the electricity supply provided by State Electricity Company (PLN). Utilization of hydro energy to generate electrical energy encourages various countries to evaluate available energy sources [1]. The flow of water with head less than 5 m can be found on irrigation channels. The flow of water in irrigation canals that have very low head can be utilized to generate electricity [3,4,5,6]. To utilize a water flow with very low head, such as in an irrigation stream, the Dethridge wheel, which originally used as a flow measurement, is used for electricity generation with an efficiency of 60% [7] and its performance improves in the channel width that is two to three times greater than the wheel width [8]. Rotation, and Dethridge wheel efficiency will be measured and analyzed for losses incurred in the system

Experimental set up
Result and Discussion
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