Early Analysis of Jumping Water Effect on Breastshot Waterwheel for Microhydro Power Plant (original) (raw)
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E3S Web of Conferences, 2019
This paper is devoted to the issues such as modelling the design parameters and operating modes and improving the design of micro hydroelectric power plants operating in low-pressure water flow. Taking into consideration above-mentioned issues, it is possible to increase the efficiency of using low-pressure water energy systems. The main dimensions of the water wheel of a micro hydropower plant depend on the water flow velocityv, water volumeQ, acting at a fixed point in time on the water wheel blade, and also on the depth of the water levelH.
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2013
Waterwheels are the oldest types of hydraulic machines. These turbines are of relatively simple design, large diameter, low rotational speed and high torques. But applying them as micro hydros of high speed and small diameter is yet to be explored. A micro hydro waterwheel of one meter diameter was designed and manufactured at the Iranian Researc † h Organization for Science and Technology (IROST) as a part of a joint research program between IROST and the Iranian Ministry of Power. The model turbine was then tested. Test results as standard turbine curves are also presented in this article. According to the results it was concluded that micro hydro waterwheels can operate efficiently at sites with high flow velocity.
Feasibility Study of Small-Diameter Pico-Hydro Breastshot Waterwheel by Computational Method
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Breastshot water wheels have very good simplicity, efficiency, and low head working range which is suitable for use in tropical rainforest villages in Indonesia. One of the weaknesses of the breastshot water wheel is that it has a very slow rotational speed which makes it need a high transmission ratio to be coupled with the generator. This study investigates the performance of a breastshot water wheel at smaller diameters and modifying the bucket inlet angle (36°, 49°, 71°, and 90°) by the computational fluid dynamics (CFD) method. In this case, the breastshot waterwheel's diameter ratio is equal to the head. Based on CFD results, the new configuration (this study) allowed us to increase the rotational speed to 30 to 35 rpm, higher than typical rotational speeds of breastshot water wheels of less than 10 rpm. Then, the bucket inlet angle and wheel rotation affect the performance of the breastshot waterwheel and are expressed using empirical law. Based on the empirical law approach, the 49° bucket is recommended because it has a stable efficiency above 60% and a wide operating range; the large discharge fluctuations do not change the turbine performance significantly.
Jumping Water Method on Microhydro Power Plant for Water Channel
Proceedings of the International Conference on Technology and Vocational Teachers (ICTVT 2017), 2017
The most used renewable energy in Indonesia comes from hydro energy. The hydro energy available in Indonesia is around 75,000-76,000 MW. Of the total available water energy in Indonesia, there is only about 3.783MW to power for large-scale power plants and about 220 MW for small-scale power plants. One small-scale hydro energy source is a small river that has a water speed range of 0.01 M / s to 2.8 m/s. Although it only has a low water velocity, the energy stored in it has the potential power to generate electricity. There are three types of waterwheels based on the water flow system, namely: overshot, breast-shot, and under-shot. In the overshot mill, the water through the windmill and the mill are under the flow of water. Water twisted the mill and water fell to the lower surface. The mill moves clockwise. In the breast-shoot wheel, the mill is placed parallel to the flow of water so that water flows through the center of the mill. Water turns the mill counterclockwise. In the undershot mill, the position of the waterwheel is placed slightly upward and slightly touches the water. The flow of water that touches the windmill moves the mill so that it is anticlockwise. And in this final project the author made a new system called Jumping Water, this system works almost the same as the breast-shoot only the wheel is not in a lower condition of the water surface, the bottom position of waterwheel parallel to the bottom of the water channel, which distinguishes the jumping water position Can be altered altitude according to the flow of the water which will affect the speed of the spin mill.
Performance of breastshot waterwheel in run of river conditions
RECENT PROGRESS ON: MECHANICAL, INFRASTRUCTURE AND INDUSTRIAL ENGINEERING: Proceedings of International Symposium on Advances in Mechanical Engineering (ISAME): Quality in Research 2019, 2020
The breastshot waterwheel is one solution for increasing the electrification ratio in remote areas. However, a feasibility study of the breastshot waterwheel in river conditions has not been conducted. This study tested the performance of the breastshot waterwheel in river conditions, which has a head of 0.26 and discharge rate of 0.09708 3 /. Mechanical and electrical testing was conducted to determine the maximum efficiency that can be produced by this turbine. The mechanical test found the following results: a maximum power level of 112.6 W (45.5% efficiency), torque of 77.9 Nm and rotation of 13.8 rpm. The electrical test produced 11.38 W of electric power (4.6% efficiency) with a voltage of 34.48 V and current of 0.33 A. Based on the test results, the breastshot waterwheel may be used as an independent power plant in remote areas due to its efficiency. In addition, the study results reveal that this turbine is not significantly affected by the garbage (household waste) in the water.
Design and Study of Hydroelectric Power Plant by Using Overshot and Undershot Waterwheels
International Journal of Energy Optimization and Engineering, 2019
This article gives an idea about the operative use of waterwheels in a river flow, which offers power generation with low cost. It also defines the working principle, calculations and design, challenges and applications beside the future scope of using Overshot and undershot waterwheels. In order to cover the enlarged demand for power in rural areas of Iraq, generated hydropower from waterwheels are one of the most promising solutions to produce electricity. Modern water wheels are made from steel which promising no harmful effects on the environment. In this research, two types of water wheels (Overshot and Undershot) are used to produce the electricity through fastening the waterwheel to a generator with the support of a belt and pulley arrangement, so the electrical energy resulted from mechanical energy. The full bridge rectifier is used to transfer electricity in its most effectual form while the regulator is used to adjust the current.
International Journal of Engineering and Technology
This study is about the used of a flywheel in an effort to improve the performance of waterwheel on irrigation channels. Flow in irrigation has low head differences including low coupled lies in lowland areas. Waterwheel undershot-type appropriate for low high head applications in an attempt to gain the electricity. A set of waterwheel developed has an outer diameter of 2 m with 12 pieces of curved-blade prepared from the material of aluminum. On the shaft of pully-belt of the step transmission conditioned the mass as flywheel varied 2-42 kg designed to performs concurrently with water wheel system. The height of flow water controlled by a sluice gate to find out the potential. As the results the performance of water wheel very dependent on the height of irrigation water. The mass of flywheel on the water wheel system can increase the rotation up to 215% as it produces the maximum electrical power of about 390 W. Keyword-Water wheel, Irrigation, River, Flywheel, Turbine I. INTRODUCTION Irrigation channels in the Koto Tibun Village are primarily provided for irrigating of agricultural land and for water supply of fisheries. This study is about the use of flywheel in order to improve the performance of undershot waterwheels. The flywheel is usually selected as a component for energy storage. A flywheel is useful for generating power to reduce the load on the generator when demand is instantly increasing, allowing the generator to maintain speed and frequency. The energy can be returned to the flywheel when the demand is reduced. Therefore, the flywheel is usually situated and turned on the shaft together. Many studies with using flywheel on the machine, but limited data for the water wheel such as a flywheel application on a multicrop threshing machine [1]. Based on their study found that 12% of the material cost and operational load on the shaft and bearings decreased and kinetic energy storage capacity increased. Another study, The Dual Mass Flywheel is used to damp the oscillations on the train engine in order to prevent shocks on the gearbox [2]. The comparative study shows that the Dual Mass Flywheel 5-6% more efficient than conventional flywheels in its use. Then there is an increase in power of about 7-8%. In throughout the irrigation channels might provide a large amount of potential energy as well. According to that condition, the regulation and optimizing the use of water resources for consumption, irrigation and hydroelectric power plant should be considered, like study have been conducted by Wu and Chen [3]. Yet, relevant to that an essential study in order to improve the energy production by water power plant concern with applied the combination water cycle power generating system has been studied by Liu and Packey [4]. Again, many studies have been conducted in order to investigate alternative and renewable energy resources. A study presents a description of the initial testing performed on the prototype pico hydro generator system for the purpose of investigating the performance [5]. The kinetic energy contained in the flow of water in domestic pipes is known to have the potential to generate electricity for energy storage purposes while performing routine activities such as laundry, cooking, and bathing. The water pressure and water flow in the pipe from the main tank utility, which is used for the activities of everyday life, used for small-scale hydro turbines rotate to drive a generator for generating electricity. The test results indicate that the readings are significantly convincing in terms of electrical voltage recorded since it can be calculated to be followed is this system is feasible for electrification aimed at storage of energy and showed good prospects for improvement and further research in the future. Furthermore, the development of a waterwheel has been carried out traditionally where it has fulfilled the needs of the water in an agricultural area [6]. In a region, wherein the water resources are available abundantly caused these efforts are highly recommended as a solution to energy deficiency in the rural area. Indonesia has the potential for hydropower are about 75.5 GW [7]. One of the sources of hydropower like that has available in Riau province where 250,571 hectares of land have been completed by the medium of irrigation canals.
IAEME PUBLICATION, 2020
The river is a natural source of water that flows from the highlands to the lowlands and empties into the river. People often use waterwheels for a long time with various models. In this study, an undershot waterwheel is planned for a mini-hydro power plant. The research was conducted by taking the initial data, namely the height of the water depth, width, and velocity of water flow (in river channels and on windmills). The results of this planning are the cross-sectional area, flow rate, water power, wheel diameter, blade width, blade distance, speed around the wheel, wheel rotation, power wheel, generator rotation, and generator power. The conclusion of this planning results in a maximum efficiency of 52.62% with the water power in the river and the turbine power of 9299.88 watt and 4846.1 watt respectively, and the generator rotation is 24.06 rpm with an efficiency of 49.99% of 2446.98 watt generator power
Design of Water Wheel For Micro power generation With Supercritical Inflow
Golden Research Thoughts, 2013
Hydropower has always been recognised as clean and cheap source of power. Various sectors are facing a problem of power crunch and hence the micropower generation is becoming popular these days. In this regard, various attempts are made to generate power with the help of continuous subcritical flow of water available in canals. Present study proposes a new technique of micro power generation with supercritical inflow at the foot of the sluice gate in canals. As no literature is available, it was decided to design a water wheel which can give maximum output in the form of rpm speed and torque for above mentioned inflow conditions. At initial stage, the studies are carried out in CFD with various wheel designs (i.e. with different geometries of vanes attached on the periphery of wheel). At length, it is decided to physically test the performance of the best wheel suggested by CFD studies. Accordingly the tests are carried out in 0.3m wide and 8 m long tilting flume. The results obtained are found to be satisfactory and presented herein.
PERFORMANCE OF UNDERSHOT WATER WHEEL AS MINI HYDRO POWER PLANT FOR AGRICULTURAL ROAD
IAEME Publication, 2021
Undershot water wheels or undercurrent water wheels work when water flows against the blade wall located at the bottom of the waterwheel. This type is suitable for installation in shallow water in flat areas. Here the flow of water is opposite to the direction of the blade which rotates the wheel. This research is an applied research that will be utilized in the regions. The purpose of this study was to determine the performance of the undershot waterwheel as a mini hydro power plant. From the results of the study it can be concluded that the performance of the undershot waterwheel is strongly influenced by the water discharge and the water level in the channel. Compared to the performance of a water wheel without a bucket and using a dynamo, the maximum water power of a water wheel without a bucket and using a dynamo is the same, namely 240.71 N at a water flow rate of 0.5833 m 3 /s. The maximum rotation of the waterwheel on the water wheel without a bucket is 18.70 revolutions/minute with the maximum rotation of the waterwheel using a dynamo 15.10 revolutions/minute. The maximum power of a water wheel on a water wheel without a bucket is 1232.97watt and on a water wheel using a dynamo the maximum power is 995.60 watts. For maximum efficiency obtained at the waterwheel without a bucket of 74.296%.