Electraulic actuators optimize valve response

Article Abstract:

The longevity of the pneumatic actuator can be explained to some extent by the limitations and drawbacks related to electromechanical and electrohydraulic actuators. Good control and stiff drives are required in damper applications such as forced draft, induced draft and primary air fans due to typically high-friction linkage systems. Many pneumatic-activated valves, such as the Leslie severe service control valve, are being upgraded with advanced electraulic actuation for improved valve performance.

Comment:

Limitations and drawbacks of electromechanical and electrohydraulic actuators explain the longevity of the pneumatic actuator

Product specifications, Rotary Valve Actuators, Valve actuators, Article

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The power of flexibility

Article Abstract:

American Electric Power's Inez station in eastern Kentucky, EPRI, and AEP have developed the latest and most advanced electronic controller designed to oppose the laws of power flow physics. The new device, called unified power flow controller, has two inverters and a shunt transformer attached to a new high-capacity 138-kilovolt transmission line. Such electronic controllers can help optimize the use of lines and provide a practical way of increasing the amount of power that can be transferred.

ELECTRONIC & OTHER ELECTRIC EQUIPMENT, Electrical & Electronic Equip, Electrical Equipment, Appliance, and Component Manufacturing, Relays and industrial controls, Electronic Control Components NEC, Product development, Electrical equipment and supplies industry, Electric equipment industry, Electronic control, Electric control equipment, American Electric Power Company Inc., EPRI, AEP

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Greenhouse gases: past, present, and future

Article Abstract:

The 2004 Energy Star awards were presented by the Environmental Protection Agency (EPA) to 57 businesses and organization that made excellent contributions for reducing greenhouse gas (GHG) emissions through energy efficiency. Americans save $9 billion in energy costs through Energy Star program and continued reduction of GHG could be noticed.

Achievements and awards, Comparative analysis, Energy industries, Energy industry, United States. Environmental Protection Agency, Powers and duties, Greenhouse gases, Energy efficiency

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