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-increase the temperature of the super heated steam
-lowering the condensing pressure
-increasing the boiler pressure
(Reheating, regeneration...)
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What are the relative advantage of Rankine Cycle over Carnot Cycle in thermal power plants?
Rankine cycle is original cycle... where Carnot is hypothetical one...in this process we use compressere insted of pump which shows that the condensation process is not fully completed. ref:engineering thermodynamics autor:p.k.nag tata macgraw hill publication
What is modified rankine cycle?
modified rankine cycle basically same as rankine cycle but main difference is inisentropic expansion process.we are nt expanding the styeam completely.steam is expanded up to certain level and after that it dumped in condenser due to high vacuum in condenser.the work losses by restricting the expansion of steam is very less which can be neglected.so that the stroke length of cylinder is reduced and the capitalcost of engine also reduced.engine performance is also good
What exhaust does nuclear power have?
Nuclear power released in a nuclear reactor is simply thermal energy, which is transferred to the water/steam in the secondary circuit to produce electrical power from the generator. There is no loss of energy between it being created by the nuclear fission process and being transferred to the steam turbine inlets. The steam cycle itself which is a Rankine cycle, has a thermodynamic efficiency of about 33 percent, that is 1/3 of the reactor output in MW appears as electric power, and 2/3 is rejected into the cooling water in the turbine condenser. Perhaps this is what you mean by 'exhaust'.
How will cooling towers inprove the efficiency of power stations?
The efficiency of the Rankine cycle depends on extracting as much energy from the steam flow through the turbine as possible, and to do this you need to have as low a vacuum in the condenser as possible. The lower the temperature of the cooling water flow through the condenser, the lower the vacuum that can be achieved. Cooling towers are often the best solution, though plants on a large lake or the ocean can use direct cooling supplies from that source and this may give better efficiency. It all depends on the cooling water temperature that can be achieved.
What are the Advantages and disadvantages of a Combined Cycle Gas Turbines?
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 energy 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).
How do you increase a Thermal efficiency of brayton cycle?
by increasing the turbine inlet gas temperature
Why efficiency of rankine cycle is more in winter than in summer?
there is more heat loss..
Working of 210 mw thermal power station?
Thermal power station of 210mw will work on principle of modified Rankine cycle
What will be the effect to the thermal efficiency to a simple Rankine cycle when the turbine work output decrease?
The efficiency will decrease.Remeber the formula for effiency for a cycle:What we want over what we pay for. So,ηT=WT/QAWhereWT = Work done by the turbineQA = Heat taken from the hot reservoir
How inefficiencies of compressor and turbine affect back work ratio and efficiency of gas turbine?
Inefficiencies in the compressor of a gas turbine cycle increase the back-work ratio and decrease the thermal efficiency of the gas turbine cycle, since they increase the compressor work.
How does a thermal power station work?
If you are after the thrmodynamic principles, see Wikipedia entry for Rankine Cycle.
What is thermal efficiency of petrol engine?
The maximum Thermal Efficiency of Petrol Engine or Gasoline Engine or Otto Cycle Engine is about 25-30%.
Difference between rankine and brayton cycle?
Brayton cycle: It is open cycle. Rankine cycle: It's close cycle. Brayton cycle: Mostly used in gas turbine engine. Rankine cycle: Mostly used in power generation plant. Brayton cycle: Resemble less to Carnot cycle. Rankine cycle: Resemble is more to Carnot cycle.
What are the relative advantage of Rankine Cycle over Carnot Cycle in thermal power plants?
Rankine cycle is original cycle... where Carnot is hypothetical one...in this process we use compressere insted of pump which shows that the condensation process is not fully completed. ref:engineering thermodynamics autor:p.k.nag tata macgraw hill publication
What is the difference between the Carnot cycle and the Rankine Cycle?
carnot cycle is a very ideal cycle that isn't practical at all , 'cause we add and reject heat isothermally , a wet mixture enters the turbine so it'll cause pitting and erosion and a wet mixture enters the pump , and the pump can't deal with a 2 phases fluid rankine cycle is a practical cycle but with a very low efficiency so the main difference lies in the adding and rejecting of heat
What is the advantage of rankine reheat cycle?
Among other advantages, this pervents the vapor from condensing during its expansion which can seriusly damage he turbine blades, and improves he efficiency of the cycle, as more of the heat flow into the cycle occurs at higher temperature.
What is the efficiency of thermal power plant?
A modern combined cycle gas turbine/ steam turbine power plant can reach almost 60% efficiency.
