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Low Head Hydraulic Model Justifies Cost
In many cases, developers of low head hydroelectric plants fail to use physical hydraulic modelling as a tool in the design process. Economic constraints are often cited as the primary...

Application of Split Roller Bearings in Small Vertical Hydro Turbines
The elimination of lower turbine bearing problems with regard to reliability and water flow contamination was the main concern of this project. A design was needed that would fit the existing...

Performance Evaluation of Rim-Drive Turbines
This paper will provide a performance evaluation of the technical and economic advantages and disadvantages of the rim-drive turbine after more than one year of operation. Technical aspects...

Upstream Elbow Tubular Turbines for Low Head Applications
This paper presents standardized Neyrpic tubular turbines for Pontook and ByPass Hydroelectric Projects. Upstream elbow turbines have been selected for those sites. In this paper, the...

Selection of Turbine Diameter and Speed for Francis, Kaplan, and Pelton Hydraulic Turbines
This paper is a continuation of work presented at WATERPOWER '83 and presents up-to-date information on the selection of diameter and speed for Francis, Kaplan, and Pelton...

Pit-Type Bulb Turbines?An Economic Solution for Low-Head Applications
For improving the profitability of extremely low head power plants the pit-type bulb turbine conception was developed, based on extensive model tests and on the operating experience with...

Pit Turbine Technology for Low Head Hydro Projects
Manufacturers of hydro generating equipment have developed designs that are adaptable to existing dams and suitable for upgrading and redevelopment of existing hydro plants. The pit turbine...

Prototype Experience With Acoustic Flowmeters
The acoustic (ultrasonic) flowmeter offers many advantages over other methods for measuring discharge in penstocks for turbine performance tests. It is nonintrusive, inexpensive and may...

Tracer Dilution Flow Measurement Application to Short Penstock Length
Absolute performance evaluation of hydro-turbines requires the determination of flowrates. Flow measurement is probably the most difficult aspect of determining a unit's efficiency....

Turbine Efficiency Monitoring Utilizing Ultrasonic Flowrate Measurement
On-line turbine efficiency measurement can be achieved by ultrasonic flowrate measurement and state-of-the-art data acquisition techniques. A field performance test program conducted at...

Experimental Investigation of the Cross Flow Turbine
A laboratory model of the Cross Flow Turbine was investigated in the Hydraulics laboratory of Colorado State University. Because of the successful use of this turbine in the developing...

Upper Yellow River Projects and Longyangxia Station
The river stretch from Longyangxia to Qingtongxia, with a head drop of 1,465 m in a distance of 1,023 km (including backwater length of the Longyangxia Reservoir) is the focus of this...

Evaluation of Reservoir Seepage in Karst Topography
Areas where seepage is likely to occur in the karst environment of the proposed West County Reservoir, Roanoke County, Virginia have been indentified. Solutioning exists in the form of...

Flow Behavior of Kinked Strip Drains
Due to the often expressed concern over the axial deformation of strip drains and the resulting impact on flow rate, this study has been undertaken. A laboratory experiment has been constructed,...

Regulatory and Environmental Issues of the Chisman Creek Superfund Site
This paper discusses the regulatory and environmental issues arising from the response to the Record of Decision (ROD) for the Chisman Creek Superfund Site in York County, Virginia. Field...

First-Order Reliability Analysis of Groundwater Flow
A method for stochastic analysis of groundwater flow based on the first-order reliability approach is presented. The method is well suited for problems in which statistical information...

On Modelling the Nonlinear Relationship Between Random Fields by Means of Higher-Order Spectra
This paper addresses the input-output relationship of nonlinear systems that may be expressed in terms of a hierarchy of linear, quadratic and higher-order transfer functions or corresponding...

Pressures on Prisms in Turbulent Shear Flows
Experimental results are presented which show that Melbourne's 'Small Scale Spectral Density Parameter,' S, controls the negative pressures on the...

Effect of Air Gap on Platform Reliability
A simplified reliability study of the effect of lateral wave forces impacting the deck of a fixed platform is presented. The reliability of the deck legs, considered the primary resistance...

Sanitary Sewer Model with Database Management
While numerous water supply and stormwater system models existed, the few sanitary sewer models that were readily available were too simplistic for engineering design and master planning...

 

 

 

 

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