Brayton Cycle
www.BraytonCycle.com
We
provide power plant and Rankine Cycle, Brayton
Cycle and Organic Rankine Cycle
project development services. Our company also offers Demand
Side Management, absorption chillers,
cogeneration, trigeneration
power and energy systems and other Energy
Conservation Measures expertise.
Cogeneration
Technologies, a Renewable Energy Technologies, LLC. Company, provides the following power
and energy project development services:
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Project
Engineering Feasibility & Economic Analysis Studies
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Engineering,
Procurement and Construction
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Environmental
Engineering & Permitting
-
Project
Funding & Financing Options; including Equity Investment, Debt
Financing, Lease and Municipal Lease
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Shared/Guaranteed
Savings Program with No Capital Investment from Qualified Clients
-
Project
Commissioning
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3rd
Party Ownership and Project Development
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Long-term
Service Agreements
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Operations
& Maintenance
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Green
Tag (Renewable Energy Credit, Carbon Dioxide Credits, Emission
Reduction Credits) Brokerage Services; Application and Permitting
We
provide Net Energy Metering project development services as well as
"turnkey" products and services in the areas of "Renewable
Energy Technologies" and in developing clean power/energy
projects that will generate a "Renewable
Energy Credit," Carbon
Dioxide Credits and Emission
Reduction Credits. Through our strategic partners, we offer
"turnkey" power/energy project development products and services
that may include; Absorption Chillers,
Adsorption Chillers, Automated
Demand Response, Biodiesel
Refineries, Biofuel Refineries, Biomass
Gasification, BioMethane, Canola
Biodiesel, Coconut Biodiesel, Cogeneration,
Concentrating Solar Power, Demand
Response Programs, Demand Side
Management, Energy
Conservation Measures, Energy
Master Planning, Engine Driven
Chillers, Solar CHP, Solar
Cogeneration, Rapeseed Biodiesel,
Solar Electric Heat Pumps, Solar
Electric Power Systems, Solar
Heating and Cooling, Solar
Trigeneration, Soy Biodiesel, and Trigeneration.
Unlike
most companies, we are equipment supplier/vendor neutral. This means we
help our clients select the best equipment for their specific application.
This approach provides our customers with superior performance, decreased
operating expenses and increased return on investment.
For more information: call us at: 832-758-0027
What is the Brayton Cycle?
A turbine operates on the principal of the Brayton Cycle, which is
defined as a constant pressure cycle, with four basic operations which it accomplishes simultaneously and continuously for an uninterrupted flow of power.
History of the Carnot Cycle, Organic Rankine
Cycle and Rankine Cycle
What is the Carnot Cycle?
The Carnot Cycle has been described as being the most efficient thermal cycle possible,
wherein there is no heat losses, and consisting of four reversible processes, two isothermal and two adiabatic.
It has also been described as a cycle of expansion and compression of a reversible heat engine that does works
with no loss of heat.
What is the
Rankine Cycle?
The
Rankine cycle is a thermodynamic cycle used to generate electricity in many power stations, and is the
real-world approach to the Carnot cycle. Superheated steam is generated in a boiler, and then expanded in a steam turbine. The
steam turbine drives a generator, to convert the work into electricity. The remaining steam is then condensed and recycled as
feed-water to the boiler. A disadvantage of using the water-steam mixture is that superheated steam has to be used, otherwise the moisture content after expansion might be too high, which would erode the turbine blades.
What is An
Organic Rankine Cycle?
A Rankine cycle is a closed circuit steam cycle. (Also - see Rankine
Cycle). An Organic Rankine cycle uses a heated chemical instead of steam
as found in the Rankine Cycle. Chemicals used in the Organic Rankine Cycle
include freon, butane, propane, ammonia, and the new
environmentally-friendly" refrigerants.
Why use a chemical refrigerant?
A refrigerant boils at a temperature below the temperature of frozen ice. Solar heat, for example, of only 150 degrees Fahrenheit from a typical rooftop solar hot water heater, will furiously boil a refrigerant. The resulting high-pressure refrigerant vapor is then piped to
an organic Rankine cycle engine.
Why is it called "organic"?
"Organic" is a term used in chemistry to describe a class of chemicals that includes Freon and most of the other common refrigerants.
Background Information and History of Rudolph Diesel and Sadi Carnot
Rudolph Diesel was educated at the predecessor school to the Technical
University of Munich, Germany. In 1878, he was introduced to the work of
Sadi Carnot, who theorized that an engine could achieve much higher
efficiency than the steam engines of the day. Carnot envisioned a cycle in
which a gas is compressed, heated, allowed to expand, and then cooled.
After the gas is cooled, the cycle begins anew. Mechanical energy is used
to compress the gas and thermal energy to heat it. In turn, expansion of
the gas yields mechanical energy, and its cooling yields thermal energy.
The net result is conversion of thermal energy to mechanical energy.1
Diesel sought to apply Carnot’s theory to the internal combustion
engine. The efficiency of the Carnot cycle increases with the compression
ratio—the ratio of gas volume at full expansion to its volume at full
compression. Nicklaus Otto invented an internal combustion engine in 1876
that was the predecessor to the modern gasoline engine. Otto’s engine
mixed fuel and air before their introduction to the cylinder, and a flame
or spark was used to ignite the fuel-air mixture at the appropriate time.2
However, air gets hotter as it is compressed, and if the compression ratio
is too high, the heat of compression will ignite the fuel prematurely. The
low compression ratios needed to prevent premature ignition of the
fuel-air mixture limited the efficiency of the Otto engine.
Rudolph Diesel wanted to build an engine with the highest possible
compression ratio. He introduced fuel only when combustion was desired and
allowed the fuel to ignite on its own in the hot compressed air.
Diesel’s engine achieved an efficiency higher than that of the Otto
engine and much higher than that of the steam engine. It also eliminated
the trouble-prone electric-spark ignition system. Diesel received a patent
in 1893 and demonstrated a workable engine in 1897.3 Today,
diesel engines are classified as “compression-ignition” engines, and
Otto engines are classified as “spark-ignition” engines.
* From the Department of Energy
website with permission
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