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Archive: Category «Energy and Power»

Generator tripping as stability control

Generator tripping is an effective (cost-effective) control especially if hydro units are used. Tripping of fossil units, especially gas- or oil-fired units, may be attractive if tripping to house load… Read more

Jul 06, 2011 | Edvard

Axial flow francis hydraulic hydro-turbine generator set

Designing Raw DC Power Supplies

Every type of electrical or electronic apparatus needs a source of electrical energy to function. The source of electrical energy is called the power supply. The two main classifications of… Read more

Jul 03, 2011 | Sa'ad Eddin

Designing Raw DC Power Supplies

Fuel cells in power section

In 1839, a British Jurist and an amateur physicist named William Grove first discovered the principle of the fuel cell. Grove utilized four large cells, each containing hydrogen and oxygen,… Read more

Jul 01, 2011 | Edvard

The Polymer Electrolyte Membrane (PEM) fuel cells

Who was James Prescott Joule?

James Prescott Joule was born on Christmas Eve 1818 into a wealthy Salford brewing family. A sickly child, he was tutored at home where he indulged his fascination for electricity… Read more

Jun 27, 2011 | Edvard

James Prescott Joule

Thumbs down to the nuclear energy

Although for decades the arguments against nuclear power have been –and still are- strong and valid, there is an increasing group of nuclear companies supported by scientists and politicians, who… Read more

Jun 15, 2011 | Edvard

Thumbs down to the nuclear energy

How contactor controls an electric motor?

When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name: contactor. Contactors typically have multiple contacts, and… Read more

Jun 01, 2011 | Edvard

Control of electric motor with contactor

Technology future – The cost of inaction

Without new thinking on technology intervention, the future looks bleak. Unless the role of technology in the global economy is reconsidered, we risk becoming powerless to feed a growing population,… Read more

May 25, 2011 | Edvard

Technology future - The cost of inaction

ESD – Electro Static Discharge

An increasing problem today with the use of more and more electronic equipment in our systems is the Electro Static Discharge (ESD). The main source of the problem is the… Read more

May 23, 2011 | Edvard

Printed Circuit Board (PCB)