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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.
Compare Brayton and Otto cycle?
The heat addition and rejection processes in otto cycle are of constant volume, whereas in brayton cycle, they are of constant pressure.
What is Bryton cycle?
The Brayton cycle is a thermodynamic cycle that describes the workings of the gas turbine engine, basis of the jet engine and others. It is named after George Brayton (1830-1892), the American engineer who developed it, although it was originally proposed and patented by Englishman John Barber in 1791.[1] It is also sometimes known as the Joule cycle. The Ericsson cycle is also similar but uses external heat and incorporates the use of a regenerator.
Difference between air refregeration cycle and reversed carnot cycle?
the Carnot cycle has 2 constant specific volume processes (heat in & heat out) the air refrigeration cycle is based on a brayton cycle which has two constant pressure processes.
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 are the important parameters in brayton cycle?
The important parameters in Brayton cycle are the pressure ratio between the compressor and turbine, the efficiency of the compressor and turbine, the temperature of the gas at various points in the cycle, and the specific heat ratio of the working fluid. These parameters are crucial in determining the performance and efficiency of the Brayton cycle.
How do you higher the thermal efficiency of a cycle?
To increase the thermal efficiency of a cycle, you can: increase the temperature at which heat is added, decrease the temperature at which heat is rejected, and reduce internal irreversibilities and losses in the system. This can be achieved by optimizing the design, improving insulation, and using more efficient components.
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.
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.
How to increase a Thermal efficiency of rankine cycle?
To increase the thermal efficiency of a Rankine cycle, you can: Increase the temperature of the heat source entering the boiler. Lower the temperature of the heat sink exiting the condenser. Improve the insulation of the system to reduce heat losses. Enhance the performance of the turbine and pump by reducing internal losses.
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%.
Compare Brayton and Otto cycle?
The heat addition and rejection processes in otto cycle are of constant volume, whereas in brayton cycle, they are of constant pressure.
How do you increase the efficiency of rankine cycle?
To increase the efficiency of a Rankine cycle, you can: increase the boiler pressure to increase the temperature of the steam entering the turbine, lower the condenser pressure to improve the quality of the exhaust steam, and use regenerative feedwater heating to reduce heat losses. Additionally, using superheated steam can also improve the efficiency of the cycle.
What is the efficiency of thermal power plant?
A modern combined cycle gas turbine/ steam turbine power plant can reach almost 60% efficiency.
Why Air Standard Cycles are conceived?
Air standard cycles are conceived to permit thermodynamic calculations using the well-known and readily available thermodynamic properties of air. The results of such calculations may be used to predict compression ratio, specific heat ratio, and other operating parameters effects on thermal efficiency of a number of heat engines such as the Otto Cycle Heat Engine , the Diesel Cycle Heat Engine, and the Brayton Cycle Heat Engine.
Constant pressure cycle used in which engine?
Gas turbine engines and airbreathing jet engines use the Brayton Cycle.
How does the thermal efficiency of an ideal Otto Cycle change with the compression ratio of the engine and the specific heat ratio of the working fluid?
The answer is 38.
