Penstock Rehabilitation
The deterioration of aging penstocks is a common problem at many existing hydroelectric plants. A comprehensive understanding of the physical condition and functional limitations of an...
Avoiding Vibration in Penstocks
One objective of this paper is to indicate the potential sources of pressure pulsations within a hydraulic conduit system and the range of forcing frequencies associated with these sources....
Penstock Monitoring System in Active Landslide Areas
During initial planning of a high-head, five megawatt hydroelectric plant in Northern California, it was identified that the entire three-mile length of a 40 inches welded steel penstock...
The Development and Writing of the ASCE Manual of Practice for Steel Penstocks
The 'Manual of Practice for Steel Penstocks' is being written under the supervision of the Hydropower Committee of the ASCE Energy Division. The committee felt...
Evaluation of an Eicher Fish Diversion Screen at Elwha Dam
In the spring of 1990, the Electric Power Research Institute (EPRI) initiated testing of an inclined fish screen installed in a 9-foot diameter penstock at the Elwha Hydroelectric Project...
Rocky Mountain Pump-Turbines and Related Mechanical Equipment
The Rocky Mountain powerplant will have three reversible, single stage, vertical shaft pump-turbine units, each having a maximum output of 321 MW generating and a maximum pumping capacity...
Operations and Maintenance Manual for Bradley Lake Hydroelectric Project
Bradley Lake Hydroelectric Project is located on the Kenai Peninsula of Alaska. The project consists of two 63 MVA turbine-generators fed via a single 3.5-mile-long penstock. The water...
Screening Data with an Expert System (PDAS)
The performance of a three-mile long penstock, constructed in an active landslide area in northern California, is monitored using 138 vibrating wire-strain gauges. Readings are taken daily,...
Steel-Lined Pressure Conduits Under Fill Dams
Development of an Eicher Screen at the Elwha Dam Hydroelectric Project
The Eicher Screen is a relatively new concept for screening juvenile fish out of hydroelectric turbine penstocks. The concept was developed by Mr. George Eicher and one was recently installed...
Vibration of Penstocks in Hydroelectric Installations
In many penstocks and pump discharge lines of turbines and pumps, pipe vibrations have been observed. Many of these installations have blade and vane arrangements other than the classic...
Pressure-Time Flow Measurements Under Adverse Conditions
Theoretical analyses suggest that the pressure-time method is capable of accurately determining flow rate in the short, varying cross section, 'semi-scroll' penstocks...
New Interior Lining for Welded and Riveted Penstocks
Pacific Gas and Electric Company (PG&E) has 73 hydroelectric power facilities installed throughout its distribution system. Each of these facilities has at least one penstock,...
Pressure Control Studies for PG&E's 20 MW Grizzly Hydroelectric Project
The Pacific Gas and Electric Company's Grizzly Hydroelectric Project consists of a single 20 MW Francis turbine under 700 feet head located near the existing Bucks Creek Project....
Hydraulic Transients in the Operation of Small Hydro Plants
Adequate governing stability is a primary consideration for most large hydroelectric generating units. However, almost all small units installed recently in the United States are intended...
Development of Reliability-Based Integrated Design-Construction Quality Assurance System of Penstock
A more rational design-construction quality assurance system is proposed by applying the concepts of the reliability-based design methods. By applying this system, the design level of...
Consolidation Grouting Operations for Kirkwood Penstock
Kirkwood Penstock, which is part of the Hetch Hetchy water system of the City of San Francisco, California exhibited evidence of settlement and local extension following extraordinarily...
Closed Conduit Vapor Lock
Closed conduit vapor lock can occur when a cross country liquid pipeline is displaced with a gas and the gas is allowed to get ahead of the liquid/gas interface. A simple hydraulic model...
Design of Isolated Small Hydro Stations
This paper presents some ideas concerning the criteria for the design of small hydro power stations operating isolated, and specially those to be installed in remote areas. Subjects covered...
Vibration Problems of Penstock Piping for a Vertical Tubular Hydraulic Turbine
Excessive vibration amplitudes were experienced in the vertical gated tubular units at the Great Falls Hydroelectric Project located in the City of Paterson, New Jersey. Vibration amplitude...
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