Experimental Study of the Power Characteristics Influence on the Hydraulic Efficiency

2018 ◽  
pp. 227-236 ◽  
Author(s):  
Pavlo Andrenko ◽  
Iryna Grechka ◽  
Sergey Khovanskyy ◽  
Maksym Svynarenko
Keyword(s):  
Experimental Study ◽  
Hydraulic Efficiency ◽  
Power Characteristics

Experimental study on the external electrical thermal and dynamic power characteristics of alkaline water electrolyzer

2018 ◽  
Vol 42 (10) ◽  
pp. 3244-3257 ◽  
Author(s):  
Xiaojun Shen ◽  
Xiaoyun Zhang ◽  
Guojie Li ◽  
Tek Tjing Lie ◽  
Lv Hong
Keyword(s):  
Experimental Study ◽  
Alkaline Water ◽  
Dynamic Power ◽  
Power Characteristics

Intake shape and boundary-related considerations in the operation and design of storm-sewer drop structures

2009 ◽  
Vol 36 (11) ◽  
pp. 1825-1834 ◽  
Author(s):  
A. Auckland ◽  
I. Nistor ◽  
R. Townsend
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Water Intake ◽  
Experimental Work ◽  
Vortex Formation ◽  
Design Guidelines ◽  
Hydraulic Efficiency ◽  
Local Shape ◽  
Geometrical Characteristics ◽  
Storm Sewer

This paper presents the results of an experimental investigation into the hydraulic efficiency of a vertically oriented water intake. Under low submergence conditions, the operation of such an intake is affected significantly by the formation of surface vortices, which result in significant flow reduction and the downstream entrainment of air and swirl. The experimental work considered the fact that vortex formation is governed by the geometrical characteristics of the intake, including the diameter, local shape, submergence, surrounding boundary, etc, and the velocity distribution in the approaching flow. Therefore, an experimental study was conducted to investigate the influence that the local shape and the proximity to nearby boundaries have on the hydraulic performance of a vertical water intake. The results of this experimental investigation will hopefully lead to a better understanding of the phenomena governing the flow in such structures and to the elaboration of improved engineering design guidelines.

Experimental Study With Analytical Validation of Energy Parameters in Parabolic Trough Collector With Twisted Tape Insert

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
U. C. Arunachala
Keyword(s):  
Experimental Study ◽  
Performance Evaluation ◽  
Analytical Model ◽  
System Performance ◽  
Operating Conditions ◽  
Twisted Tape ◽  
Hydraulic Efficiency ◽  
Parabolic Trough ◽  
Parabolic Trough Collector ◽  
Maximum Percentage

Abstract Thermo-hydraulic performance evaluation of parabolic trough collector is important while introducing heat transfer augmentation techniques to it. In the present outdoor experimental study, the role of twisted tape is justified in laminar flow-based parabolic trough collector. For the Re range of 544–1742 and solar beam radiation of 400–750 W/m2, the use of twisted tape (twist ratios: 5.2, 4.1, and 2.7) resulted in maximum instantaneous efficiency of 22.3%, 29.5%, and 40%, respectively, against 19.1% with plain receiver. The effect of pressure drop rise on system performance due to twisted tape is found to be insignificant as effective thermo-hydraulic efficiency recorded are 21.8%, 29.3%, and 39.7%, respectively, with maximum uncertainty involved of 1.01%. In view of the importance of system performance evaluation over a wide range of operating parameters and limitation of outdoor experiments, an analytical model has been developed which followed the similar trend. The model takes into account various operating conditions, viz. laminar, twisted tape-based laminar and turbulent flow condition as well as air-in-annulus and evacuated receiver cases. Using the model (laminar region) in both plain and twisted tape cases, the maximum percentage deviation in the prediction of exit fluid temperature (in °C) and effective thermo-hydraulic efficiency are 1.6 and 13.3, respectively. Further, for a turbulent case, the maximum percentage deviation in exit temperature (in °C) noticed is 2.9. Hence, the developed analytical model is having a good agreement with the experimental outcomes.

20713 Experimental study for Wind power Characteristics utilizing a Rigid-Flexible sheet Flutters

2013 ◽  
Vol 2013.19 (0) ◽  
pp. 385-386
Author(s):  
Yuto ICHIHARA ◽  
Yutaka TAGUCHI ◽  
Donghyuk KANG ◽  
Kazuhiko YOKOTA ◽  
Kotaro SATO
Keyword(s):  
Experimental Study ◽  
Wind Power ◽  
Power Characteristics

Wave Transmission over a Submerged Porous Breakwater an Experimental Study

2014 ◽  
Vol 567 ◽  
pp. 319-324 ◽  
Author(s):  
Hee Min Teh
Keyword(s):  
Experimental Study ◽  
Wave Attenuation ◽  
Wave Transmission ◽  
Shallow Waters ◽  
Wave Steepness ◽  
Test Results ◽  
Hydraulic Efficiency ◽  
Transmission Characteristics ◽  
Test Program ◽  
Monochromatic Waves

The present paper presents an experimental study of wave transmission for a trapezoidal submerged porous breakwater located in the nearshore region. Wave transmission characteristics of the breakwater subjected to unidirectional monochromatic waves have been ascertained via a systematic test program. A series of tests have been conducted to study the effect of porosity of the breakwater on wave transmission, and to assess wave attenuation performance of the breakwater in relation to wave steepness and the relative breakwater width. The test results have indicated that the breakwater of 20% porosity offers the highest hydraulic efficiency, and the breakwater provides higher wave suppression ability when exposed to shorter period waves particularly in shallow waters.

Experimental Study of a Photovoltaic Direct Current Water Pumping System for Irrigation in Rural-Isolated Region of Arequipa, Peru

2019 ◽  
Vol 141 (4) ◽  
Author(s):  
Aixa Anel Peralta Vera ◽  
Herbert Jesús del Carpio Beltrán ◽  
Juan Carlos Zúñiga Torres ◽  
Juan José Milón Guzmán ◽  
Sergio Leal Braga
Keyword(s):  
Experimental Study ◽  
Mass Flow ◽  
Direct Current ◽  
Solar Irradiance ◽  
Hydraulic Pressure ◽  
Hydraulic Efficiency ◽  
Pv Array ◽  
Pumping System ◽  
Continuous Current ◽  
H 30

In the present experimental study, a photovoltaic (PV)-powered system in continuous current (4 kW) for the pumping of water in an isolated, rural agricultural zone in Arequipa—Peru was analyzed. A meteorological station was installed in the studied zone, measuring solar radiation, temperature, relative humidity, and wind speed. The electrical and hydraulic parameters of the solar-pumping system (i.e., electric current, voltage, mass flow, and hydraulic pressure) were measured in order to evaluate the efficiency of the energy transformation processes. The results indicate that, during the year of 2017, the PV pumping system in direct current (DC) functions from 07 h 30 min to 15 h 30 min, during an average of 8 h a day. The PV array, hydraulic, and global efficiencies were evaluated. This allows for the interpretation of efficiency independent of solar irradiance. The efficiency of the PV array and global efficiency remained constant (11.5% f and 8.5%, respectively). The functioning interval of the PV array ranges from 880 W up to 3400 W, making evident the versatility of the system of generation and consumption in DC, which is able to function since solar irradiance is at least 200 W/m2, corresponding to 880 W of PV array power, 27 m of total dynamic head (TDH) and 2 kg/s of mass flow, and 70% hydraulic efficiency. With greater mass flows (6.3 kg/s), the PV array power was 3256 W with a hydraulic efficiency of 55%, a TDH of 30 m, and a peak solar irradiance of 1190 W/m2. When the whole system functions in DC, the efficiencies are superior to those of systems, which operate with DC/alternating current (AC) current inverters.

Theoretical Calculation and Experimental Study on Power Characteristics of FDZ Damper

2021 ◽  
Author(s):  
Zhao Jianli ◽  
Wang Lei ◽  
Yan Xu ◽  
Wang Liang ◽  
Dang Ning
Keyword(s):  
Experimental Study ◽  
Theoretical Calculation ◽  
Power Characteristics

Experimental study of the hydraulic efficiency of a novel perforated-wall caisson concept, the LOWREB

2017 ◽  
Vol 126 ◽  
pp. 69-80 ◽  
Author(s):  
Crina-Stefania Ciocan ◽  
Francisco Taveira-Pinto ◽  
Luciana das Neves ◽  
Paulo Rosa-Santos
Keyword(s):  
Experimental Study ◽  
Hydraulic Efficiency ◽  
Perforated Wall

scholarly journals Development of a methodology for calculating the working process of a small-size two-stroke internal combustion engine

2021 ◽  
Vol 20 (3) ◽  
pp. 97-109
Author(s):  
V. V. Biryuk ◽  
A. A. Gorshkalev ◽  
M. O. Zakharov ◽  
V. L. Larin
Keyword(s):  
Experimental Study ◽  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Experimental Studies ◽  
Internal Combustion ◽  
Maximum Speed ◽  
Combustion Engines ◽  
Working Process ◽  
Power Characteristics

On the basis of the available theoretical calculations, methods for calculating the working process and power characteristics of internal combustion engines and the experimental studies carried out, a method for calculating the working process for small-sized two-stroke internal combustion engines was developed and tested. In the course of this work, the following results were obtained: the parameters of the working process and power characteristics of a small two-stroke internal combustion engine; the parameters obtained by calculation during the study of the Evolution 20GX2 engine were compared with the results of an experimental study. According to the results of the comparison, deviations in the values of the parameters of the engine under study from the results of the experimental study at the maximum power and maximum speed modes were identified.

scholarly journals AN EXPERIMENTAL STUDY OF ELECTRIC ARC CURRENT HARMONICS IN ELECTRIC ARC FURNACES WITH DIFFERENT POWER CHARACTERISTICS

2016 ◽  
Vol 14 (3) ◽  
pp. 106-120 ◽  
Author(s):  
Aleksandr A. Nikolaev ◽  
◽  
Jean Jacques Rousseau ◽  
Vincent Szymanski ◽  
Platon G. Tulupov ◽  
...  
Keyword(s):  
Experimental Study ◽  
Electric Arc ◽  
Current Harmonics ◽  
Electric Arc Furnaces ◽  
Power Characteristics ◽  
Arc Furnaces ◽  
Arc Current
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