Study on Open Cross-Flow Runner for Environmentally Friendly Nano-Hydraulic Turbine Utilizing Waterfall (Influence of Waterfall Thickness on the Runner Performance)

2011 ◽  
Author(s):  
Masahiro Yamazaki ◽  
Shingo Oike ◽  
Shouichiro Iio ◽  
Toshihiko Ikeda
Keyword(s):  
Power Generation ◽  
Flow Rate ◽  
Flow Condition ◽  
Great Influence ◽  
Cross Flow ◽  
Environmentally Friendly ◽  
Hydraulic Turbine ◽  
Open Type ◽  
Low Head

The aim of this investigation is to develop an open type cross-flow runner for environmentally friendly nano-hydraulic turbine utilizing extremely low head waterfalls. The waterfall condition is strongly affected by weather, so flow rate changes frequently. It causes a decrease in runner performance because it does not have any flow adjusting mechanisms. It is, therefore, important to evaluate the runner performance against the change of flow condition for stable power generation. This study focused on the influence of waterfall flowing position and its thickness on the runner performance. An open type cross-flow runner was applied for waterfall generation. As a result, we found that the runner characteristic varied with the waterfall condition. In particular, the waterfall thickness has great influence on the runner performance. The value of CPmax reaches the highest value of 0.61 at Q = 3.0×10−3 m3/s.

The Helical Turbine and Its Applications for Hydropower Without Dams

2002 ◽  
Author(s):  
Alexander M. Gorlov
Keyword(s):  
Cross Flow ◽  
Environmentally Friendly ◽  
Open Ocean ◽  
Water Currents ◽  
Low Head ◽  
Tidal Streams

The objective of this paper is to introduce an environmentally friendly Helical Turbine that has been developed to operate in free or ultra low-head water currents without dams. The turbine is a cross flow unidirectional rotation machine that makes it particularly valuable for ocean applications, such as reversible tidal streams in ocean bays, estuaries and canals, streams in open ocean, underwater currents generated by wave fluctuations etc.

scholarly journals Investigation of Blade Angle of an Open Cross-Flow Runner

2015 ◽  
Vol 32 (1) ◽  
Author(s):  
Yusuke Katayama ◽  
Shouichiro Iio ◽  
Salisa Veerapun ◽  
Tomomi Uchiyama
Keyword(s):  
Flow Rate ◽  
Simple Structure ◽  
Cross Flow ◽  
Hydraulic Turbine ◽  
Circular Plates ◽  
Power Performance ◽  
Blade Angle ◽  
Drop Structure ◽  
Inlet Angle ◽  
The Relationship

AbstractThe aim of this study was to develop a nano-hydraulic turbine utilizing drop structure in irrigation channels or industrial waterways. This study was focused on an open-type cross-flow turbine without any attached equipment for cost reduction and easy maintenance. In this study, the authors used an artificial indoor waterfall as lab model. Test runner which is a simple structure of 20 circular arc-shaped blades sandwiched by two circular plates was used The optimum inlet blade angle and the relationship between the power performance and the flow rate approaching theoretically and experimentally were investigated. As a result, the optimum inlet blade angle due to the flow rate was changed. Additionally, allocation rate of power output in 1st stage and 2nd stage is changed by the blade inlet angle.

scholarly journals Perancangan Model Pembangkit Listrik Dengan Menggunakan Teknologi Pompa Tanpa Motor (Hydraulic Ram Pump)

MECHANICAL ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 57
Author(s):  
Jorfri Boike Sinaga ◽  
Azhar Azhar ◽  
Novri Tanti ◽  
Sugiman Sugiman
Keyword(s):  
Water Supply ◽  
Flow Rate ◽  
Volume Flow Rate ◽  
Electrical Power ◽  
Cross Flow ◽  
Hydraulic Turbine ◽  
Volume Flow ◽  
Internal Diameter ◽  
Chamber Volume ◽  
Irrigation Design

This paper presents the design of parameters of  hydraulic ram pump and hydraulic turbine to use  the energy of flowing water for water supply to generate electrical power and irrigation. Design of  parameters of hydraulic ram pump with head of water supply of 1,5 m was obtained: 1,25 in. diameter and  8 m length of drive pipe,  200 gr and 4,6 cm of weight  and diameter of impulse valve,  4.200 cm3 of air chamber volume. The testing results of the hydraulic ram pump model shown that water could be pumped as far as the height of 7 m and 8 m, with the volume flow rate of 2,755 lit/men and 1,73 lit/men.  Design of  geometric parameters of cross flow hydraulic turbine with head of water supply of 1,75 m was obtained:  12 cm and 8 cm of external and internal diameter, 25 cm of runner width,  and 18 of runner number.   The testing results of the cross flow hydraulic turbine shown that power could be generated 83,47 W with the volume flow rate of 0,01 lit/s and the efficiency of 71,05 % at 799 rpm. The testing result also shown that with using volume flow rate of 0,003 lit/s, this turbine could be generated 23,39 W with the efficiency of 46,64 %. Technically the technology of hydraulic ram pump can be developped and used to supply of water for irrigation and generating of electrical power.

scholarly journals Numerical analysis of a new cross-flow type hydraulic turbine for high head and low flow rate

2021 ◽  
Vol 15 (1) ◽  
pp. 1491-1507
Author(s):  
Calogero Picone ◽  
Marco Sinagra ◽  
Costanza Aricò ◽  
Tullio Tucciarelli
Keyword(s):  
Numerical Analysis ◽  
Flow Rate ◽  
Cross Flow ◽  
Hydraulic Turbine ◽  
Low Flow ◽  
Flow Type ◽  
High Head ◽  
Low Flow Rate

scholarly journals Production of electricity employing sewerage lines using a micro cross flow turbine

2020 ◽  
Vol 12 (2) ◽  
pp. 67-77
Author(s):  
Muhammad Hamza Tahir ◽  
Shoukat Ali Mugheri ◽  
Salman Ahmad ◽  
Mughees Shahid ◽  
Nouman Zaffar ◽  
...  
Keyword(s):  
Power Systems ◽  
Flow Rate ◽  
Electricity Generation ◽  
Research Work ◽  
Cross Flow ◽  
Maximum Flow ◽  
Developing Nations ◽  
Electricity Production ◽  
Low Head ◽  
Cost Efficient

In the design of cross flow turbines, efficiency is a significant parameter. The crossflow turbine for developing nations is the most cost-efficient electricity generation source and often used in isolated power systems. This research work analyzes the potential of electricity production using a micro-cross flow turbine from sewage lines. To measure the hydraulic potential of the sewage’s wastewater, flow rate at the connection point was investigated by experimentation on site and the efficiency of the micro cross flow turbine was evaluated. The experimental results show that the hydraulic potential of the selected point for electricity production is enough throughout the year. It also shows that the micro-cross flow turbine can be used effectively to produce electricity from the sewage at the link points. The highest efficient 2 mm head was observed with a maximum flow rate of 0.112 m3/s. Depending on the flow rate, the turbine velocity was 103-263 rpm. The maximum power of shaft was 284.58 W and the highest power generated was 196.24 W. The maximum overall efficiency was 68.2%. This article discusses the design, efficiency, operation and cost of low-head micro crossflow turbines. Keywords: Electricity Generation, Hydraulic Potential, Micro Cross Flow Turbine, Sewage

scholarly journals Utilization of the dethridge wheel as a low head power generator and loss analysis

2018 ◽  
Vol 204 ◽  
pp. 04003
Author(s):  
Dan Mugisidi ◽  
Oktarina Heriyani ◽  
Rizal Andi Luhung ◽  
Moh. Ramdani Dwi Andrian
Keyword(s):  
Power Generation ◽  
Flow Rate ◽  
Small Scale ◽  
Flow Meter ◽  
Hydro Power ◽  
Flow Rates ◽  
Power Generator ◽  
Loss Analysis ◽  
Low Head ◽  
Water Wheel

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.

Effect of Runner Position on Performance for Open Type Cross-Flow Turbine Utilizing Waterfalls

2014 ◽  
Vol 8 (6) ◽  
pp. 1012
Author(s):  
Yusuke Katayama ◽  
Shouichiro Iio ◽  
Salisa Veerapun
Keyword(s):  
Cross Flow ◽  
Open Type

Heat and Mass Transfer to Air in a Cross Flow Heat Exchanger with Surface Deluge Cooling

2016 ◽  
Vol 24 (01) ◽  
pp. 1650002 ◽  
Author(s):  
Andrea Diani ◽  
Luisa Rossetto ◽  
Roberto Dall’Olio ◽  
Daniele De Zen ◽  
Filippo Masetto
Keyword(s):  
Heat Exchanger ◽  
Heat Flow ◽  
Flow Rate ◽  
Data Center ◽  
Heat Dissipation ◽  
Cross Flow ◽  
Critical Conditions ◽  
Heat Flow Rate ◽  
External Temperature ◽  
Flow Heat

Cross flow heat exchangers, when applied to cool data center rooms, use external air (process air) to cool the air stream coming from the data center room (primary air). However, an air–air heat exchanger is not enough to cope with extreme high heat loads in critical conditions (high external temperature). Therefore, water can be sprayed in the process air to increase the heat dissipation capability (wet mode). Water evaporates, and the heat flow rate is transferred to the process air as sensible and latent heat. This paper proposes an analytical approach to predict the behavior of a cross flow heat exchanger in wet mode. The theoretical results are then compared to experimental tests carried out on a real machine in wet mode conditions. Comparisons are given in terms of calculated versus experimental heat flow rate and evaporated water mass flow rate, showing a good match between theoretical and experimental values.

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