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What is Difference between open cycle and closed cycle gas turbine?
The open cycle exausts the gases (produced by combustion) directly to atmosphere, sometimes the heat can be reclaimed to be utilised in a combined system (Rankine cycle added to gas cycle). Where as the closed cycle will reuse the gasses from the exaust instead.
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Closed. Except for the rare case of humans launching objects into space and meteorites striking the planet (which represent an incredibly miniscule fraction of the tota…l carbon), the amount of carbon in the system remains at a constant mass.
A combined cycle is characteristic of a power producing engine or plant that employs more than one thermodynamic cycle. Heat engines are only able to use a portion of the ener…gy their fuel generates (usually less than 50%). The remaining heat (e.g. hot exhaust fumes) from combustion is generally wasted. Combining two or more "cycles" such as the Brayton cycle and Rankine cycle results in improved overall efficiency. It can also work with the Otto, diesel, and Crower cycles which may allow it to be suited to automotive use. Aside from the Rankine cycle, the Stirling cycle could also be used to re-use waste heat in automotive or aeronautical applications, for the simple reason that there is less weight (water) to carry and that stirling engines or turbines can be made to operate with low temperature differences. In a combined cycle power plant (CCPP), or combined cycle gas turbine (CCGT) plant, a gas turbine generator generates electricity and the waste heat is used to make steam to generate additional electricity via a steam turbine; this last step enhances the efficiency of electricity generation. Most new gas power plants in North America and Europe are of this type. In a thermal power plant, high-temperature heat as input to the power plant, usually from burning of fuel, is converted to electricity as one of the outputs and low-temperature heat as another output. As a rule, in order to achieve high efficiency, the temperature difference between the input and output heat levels should be as high as possible (see Carnot efficiency). This is achieved by combining the Rankine (steam) and Brayton (gas) thermodynamic cycles. Such an arrangement used for marine propulsion is called Combined Gas (turbine) And Steam (turbine) (COGAS).
1. The working gas is compressed in compressor and directed towards the heat exchanger (Air heater), where heat is being added to the compressed gas before it enters the t…urbine. 2. The heat is supplied by an external source such as a nuclear reactor, or some other heat source. 3. The hot gasses then expend and accelerate through a nozzle which drive the guide vanes of the turbine and then shaft. 4. At last, the remaining exhaust gasses pass through a cooler and directed towards the compressor inlet.
Biogeochemical cycles are basically of two types: a) Gaseous cycles like carbon (as carbon dioxide), oxygen, nitrogen, etc. b) Sedimentary cycles like sulphur, phosphorus, e…tc. In gaseous cycles, the elements have a main reservoir in the gaseous phase, and the reservoir pool is the atmosphere or water. The biogenetic materials involved in circulation pass through a gaseous phase before completing the cycle. In sedimentary cycles, the elements main reservoir pool is lithosphere and the biogenetic materials involved in circulation are non-gaseous. The sedimentary cycles are usually very slow as the elements may get locked up in rocks and go out of circulation for long periods.
in open cycle arrangement the exhaust coming out from turbine is rejected into the atmosphere. so the air enters to compressor goes to combustion chamber then to tur…bine and then rejected to atmosphere.
The advantages of combined cycle gas turbines are high power-to-weight ratio, smaller, fewer moving parts and less vibration than a reciprocating engine. Other advantages …include very low toxic emissions, runs on a wide variety of fuels, and high operating speeds. Disadvantages are higher cost, longer start-up, less responsive to power demands, and a shrill whining noise.
In an open cycle gas turbine, the gases that are produced by combustion go directly into the atmosphere, though the heat produced can sometimes be reclaimed. In a closed cyc…le gas turbine, the gases produced are reused and are not emitted into the atmosphere.
Around 72 %
umm no idea haha
yes, it is a heat engine. A heat engine is one that extracts heat energy and converts it to mechanical energy.
Depends on what type of gas, plant size and cycle and carriage.
Vapour runs on the blood of an unborn fetus. They sell fuel at Wal Mart. :)
A semi-closed cycle is a closed cycle which incorporates internal combustion with controlled removal of excess carbon dioxide and water, and controlled addition of a correspon…ding amount of fuel and oxygen as dictated by the power generation needs. Use of air instead of oxygen is would create a build-up of nitrogen in the working fluid, and increase NOx pollutants. Recirculation of some of the carbon dioxide closes the cycle.
Open. The phosphorous enters the system in mineral form (apatite is a type of rock that weathers into available mineral phosphorous) or from animal sources (guano, bone). …Water will wash away phosphates which will cause a need for more. The availability of phosphate is a huge limiter in plant growth.