White Papers

Avoiding the Costly Challenges of Seized Coupling Bolts in Hydropower Plants

Planned turbine outages are among the most expensive costs to power plants. Often, such costs to hydropower facilities are compounded by the seizing of conventional fitted bolts in turbine/generator (T/G) coupling flanges. These seized bolts require extensive, time-consuming labor through a number of methods – most of which typically fail. Unexpected expenditures and time delays contribute to the problem, but a solution does exist, as this white paper reveals. Cost comparisons and a hydropower plant case study are also included, making this a valuable and insightful resource for anyone involved in hydropower facility operations.

White Paper brought to you by:  Superbolt/ Nord-Lock Group

Top Ten Reasons Generators Fail™ Hydrogenerator Edition

Power plant engineers and technicians will find useful this downloadable hydro version from NEC's well-known Engineer's Notebooks series. Presented are 10 mini case studies of failures common to hydrogenerators, Find out how good maintinence practices can impact the health of your unit and prevent unexpected stator rewinds or damage to rotor components and more.

This white paper is sponsored by National Electric Coil.

Sponsored by

Cost Effective, Small Scale Pumped-Storage Solution

Obermeyer's adjustable speed pumped-storage hydropower design utilizes the concept of submerging a reversible pump turbine below tailwater, eliminating the need for an underground powerhouse.  This state-of-the-art design allows for more economical energy storage in the renewable energy market.   

White Paper Sponsored by Obermeyer Hydro, Inc.

Sponsored by

Enterprise Portfolio Management for Utilities

For asset-intensive organizations, the ability to manage portfolios of investments and make optimal cross-enterprise decisions is critical. When faced with a multitude of projects across the energy value chain, utilities still often make investment decisions within their departmental silos, and with limited information. How can utilities best understand the true value of their projects? And, how can they make decisions to maximize that value at an enterprise level?

Copperleaf partnered with leading research agency, Zpryme, to survey more than 160 primarily North American utilities to understand:

  • Attitudes toward cross-enterprise investment decision making
  • The benefits and challenges of taking an enterprise view of investments
  • The current and future state of Project Portfolio Management (PPM) tools for utilities

White Paper sponsored by Copperleaf

Sponsored by

The Floating Bulkhead: A Practical, Flexible, and Economical Approach to Dewatering Gates

Many dams have some type of gate(s) to pass water, either for dewatering, normal river flows, or flood flows. Many of these gates are over 50 years old and either need maintenance or periodic operation to verify they can be opened during a high-flow event. If the dam spillway was not constructed with a system to dewater the gate from the impoundment, the owner’s choices include constructing a costly cofferdam or bulkhead system to dewater the gate, or dewatering the entire reservoir, which may not be an option and may also pose environmental and recreational concerns. 

In this paper we will describe the general principles behind the design and fabrication of a floating bulkhead, outlining potential cost savings of a floating bulkhead versus traditional bulkhead, and providing varying case studies of spillway configurations to demonstrate the various scenarios in which a floating bulkhead can be placed. 

White Paper brought to you by Ayres Associates


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