Tag: photovoltaic cell

A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Solar cells are the building blocks of photovoltaic modules, otherwise known as solar panels.

The Physics of CHP Cogeneration and Heat Engine Efficiency

The Physics of CHP Cogeneration and Heat Engine Efficiency

How does CHP work? To understand CHP you have to begin with the Carnot cycle, and how it describes the function and efficacy of any heat engine. The thermodynamic Carnot cycle (proposed by Nicolas Carnot in 1824) is a four-stage process that describes the reciprocal operations of a heat engine

Popeye Was Right: There’s Energy in That Spinach

Newswise — Using a simple membrane extract from spinach leaves, researchers from the Technion-Israel Institute of Technology have developed a bio-photo-electro-chemical (BPEC) cell that produces electricity and hydrogen from water using sunlight. The raw material of the device is water, and its products are electric current, hydrogen and oxygen. The

Better Together

Better Together

“Waste not want not” is a respected proverb in many engineering applications. However, according to the three laws of thermodynamics, waste heat is inevitable in any working system. And, while it is physically impossible to prevent the generation of waste heat, a power system operator can make a virtue out

Why Solar, Why Now?

Why Solar, Why Now?

It became undeniable last year that renewable energy in general, and solar energy in particular, had reached its tipping point. After decades of promise and struggle through adverse market conditions, while incrementally improving its tech­nological performance, solar energy was poised to take off. And take off it did.

It is no longer

Layer Upon Layer

Layer Upon Layer

A landfill waste disposal operation is a two-stage process. The first stage involves the actual depositing of the waste on the workface of the current disposal cell, followed by spreading into relatively thin layers, and compaction to the maximum density possible given the waste’s physical characteristics and available compaction equipment.

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