Tag: CHP

Combined heat and power (CHP) is used to describe the process of obtaining electricity and useful heat from a common fuel source. In years past, this process was called cogeneration, a term most engineers are familiar with. Whether it is called CHP, cogeneration, or trigeneration (heating, cooling, and electric production), the concept offers remarkable promise for energy efficiency in a world that wants to lower costs, reduce dependence on fossil fuels, and cut greenhouse gas emissions.

A Growing Trend

A Growing Trend

Cogeneration systems, also known as combined heat and power, have traditionally been installed by larger industrial users with high steam and power demands and by smaller, institutional users such as universities and hospitals. Since the early 2000s, smaller industrial and commercial companies have discovered cogeneration utilizing natural gas-fired reciprocating engines,

The Costs and Benefits of Anaerobic Digesters

The Costs and Benefits of Anaerobic Digesters

Anaerobic digesters are a mature, proven technology. They take sludge, manure, and other organic waste materials and produce methane (natural gas) fuel. Nobody questions their technological capabilities. However, the question remains as to their economic benefits. In terms of dollars and cents, how much economic sense do anaerobic digesters make?

Fuel Cells and Energy Sustainability

Fuel Cells and Energy Sustainability

Given that energy sustainability and energy economics are top-of-mind among business leaders, politicians, and the public these days, hydrogen fuel cells may be viewed as a savior technology. If that statement seems hyperbolic, there is plenty of statistical evidence to support the growth of fuel cell use for both stationary

Reader Profile: Michael Edwards

Reader Profile: Michael Edwards

Throughout his career, Michael Edwards has developed a birds-eye view of just about every aspect of the energy sector. As such, he’s developed a keen sense of what makes an energy company—and its employees—successful.

Software: Optimizing Operations

Software: Optimizing Operations

For commercial, industrial, and institutional power consumers with a heightened need for affordable, reliable, and resilient power supply, advanced microgrids can provide not only control over power sources and energy costs, but also “green” energy and peace of mind. Microgrids employ a wide range of onsite generation resources, along with

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

Energy Management Systems

To exemplify the evolving nature of energy management systems, Greg Turner, vice president for Honeywell Business Solutions, recalls a recent conversation in which a hospital facilities manager spoke of how he’d have to come up with budget figures once a year that would either be accepted or rejected.

“Now I get calls almost

Integrating CHP with Microgrids

Integrating CHP with Microgrids

While combined heat & power (CHP) may not be appropriate for integration into all microgrids, it definitely does have its place in a lot of them.

CHP systems output heat (or cooling), as well as electricity, primarily as a topping cycle. “The prime mover is typically a reci­procating engine or a turbine,”

Editor’s Comments: Seeing the Invisible

It was one of those clear days in which early rain had bathed every atom and left the world looking more three-dimensional than usual. I paused during a hike and stood overlooking the velvet folds of California’s coastal mountain range. Raptors rode upwellings in the distance. One of them—a hawk—landed on a

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