Portland's New Approach to Maintenance
The traditional if it ain't broke don't fix it approach to maintenance was not working for Portland, Oregon's two wastewater treatment plants. By...
Electrical Design Survey
In North America, a mini hydro project consists primarily of the civil works which routes water to the turbine generator and the electrical hardware necessary to interface it with a utility....
Economic Impact of Reduced High-Voltage Equipment Life
In May, 1989, the Western Area Power Administration and the Bureau of Reclamation published a report entitled Replacements: Units, Service Lives, Factors. This report showed that equipment...
Voltage Regulator Influence on Generator System Stability
During initial startup of a generator system, it is not uncommon to witness generator voltage instability. Most of the time, the solution is reduced to returning the stability control...
Design Considerations for Radial Key Retrofit
A practise that is becoming more and more common is to retrofit hydro-electric generators with Radial Key Systems. There are significant design considerations that must be made to ensure...
Repair of Rainbow Project Unit Number Eight
This is a case history that discusses diagnosis and correction of a AC synchronous generator problem. The problem involved loss of mechanical integrity between the generator's...
Hydraulic Aspects of West Delaware Tunnel Hydroelectric Development
Construction of a 7,500 kilowatt hydroelectric plant at the end of a 70 kilometer long water supply tunnel posed unusual hydraulic conditions that needed special consideration. Cooperation...
Modernization of the Schoolfield Dam Hydroelectric Powerhouse
This case study describes the retrofitting of a turn-of-the-century powerhouse with modern turbine/generator equipment. The structure consists of numerous turbine bays separated by massive...
Rehabilitation of the Historic Ocoee 1 Hydro Power Plant
The Ocoee 1 Hydro Plant is located on the Ocoee River 16 miles east of Cleveland, Tennessee. Built by the East Tennessee Power Company, it was placed in commercial operation in 1912. There...
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...
Some Unusual Vibrations in Hydro Machinery
Most hydro machinery engineers have read the textbook cases of self-exited and flow induced vibrations. Usually such textbook vibrations are only found in the text book! In the real world,...
Accuracies of Lysimeter Data Acquisition Systems
Electronic dataloggers are integral parts of most weighing lysimeter systems. Dataloggers supply excitation voltages to lysimeter load cells and measure resulting voltage signals. Resolution...
Local Resources in Developing Country Water Supplies
Maximizing the use of local resources in water supply projects can expand markets for locally produced equipment and materials, reduce exports and minimize expenditures of hard currency...
Temporary Structures for Protection and Access
Temporary Structures in Construction Projects (TSC) are utilized for three (3) purposes A. Support (of the structure being built or adjacent structures or utilities) B. Protection (of...
Construction and Robotics: Problems and Solutions
The role of robotics in construction, and the role played by construction engineers (CE's) is placed in perspective. Robot development, like machine manufacture, has always...
The CRANIUM: A Case Study of Sensory Improvement for Construction Equipment Operators
Machines excel at physical processes such as generating large forces and performing repetitive motions, but humans are still better at information intensive processes such as planning,...
Computer-Based Environment for Integrated Tunneling Design and Construction
The MIT tunneling group has developed, over the past decade, a number of decision support tools for the geologist and engineer, planner and designer, owner and contractor involved in tunnel...
Globalization and its Impact on Construction Technology
The nature of international construction markets is changing. Competition is yielding to the concept of globalization. This paper discusses some of the issues which constitute topics of...
Computer Data Exchange Using National and International Standards
There is a need within the construction industry to electronically transmit standard documents between designers, owners, contractors, and material suppliers. Ideally, the transmission...
Learning and Innovating in a Construction Technology Laboratory
It has been generally recognized that the construction industry world wide, and especially in the U.S., needs innovative changes in order to produce more complex products at higher quality...
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