Coulomb

On June 14, 1736, Charles-Augustin de Coulomb was born in France.

The name might seem vaguely familiar. In an electrical engineering or physics class that you struggled to keep awake in, the prof defined the unit of electric charge.

The coulomb, or just C, is the unit of electric charge. It is the charge transported by a constant electrical current of one ampere in one second.

C comes into plays in capacitance, the storing of charge. C is also the amount of excess charge on a capacitor of one farad charged to a potential difference of one volt.

(April 2012) MidAmerican Energy awarded a contract to Siemens Energy to supply wind turbines for its 407-MW project expansion. American Electric Power began operating the 580-MW Dresden natural gas-fired combined-cycle power plant. Duke Energy and ChinaHuaneng Group signed a three-year agreement expanding their research cooperation to include coal and carbon capture and sequestration technologies. And others...

(January 2012) Hawaiian Electric selects Renewable Energy Group to supply biodiesel for combustion turbine; GE signs long-term services agreement with Comision Federal de la Electricidad; Nissan North America selects Coulomb Technologies to provide EV charging infrastructure locations; Siemens agrees to acquire eMeter; plus announcements and contracts involving AES Corp., Maui Electric, KCP&L, and others.

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Alstom introduces a new 3-MW wind turbine, one of the world’s most powerful for onshore installations; Solyndra reports its larges-ever rooftop installation of cylindrical photovoltaic (PV) systems — a 704-kW project in New Jersey; Plug Power reports that its GenDrive fuel cell units will power Walmart Canada’s fleet of electric lift trucks at a Alberta distribution center.