THERMAL ANALYSIS

Thermal Analysis

Thermal Analysis



Thermodynamics cycle analysis to estimate the temperatures at the turbine inlet and exit and the overall plant efficiency

According to the problem statement, the single shaft gas turbine for a power generation application comprising an axial flow compressor with 11 stages to achieve a pressure ratio of 15.5 to 1, a single can combustor, and a turbine with 3 reaction stages. As net electric power output from the plant is 11250 KW and the exhaust gas flow is 47.5 kg/s. The plant values natural gas which consists 95% Methane and 5% Ethane by volume and has a lower heating value of 48.12 MJ/kg. The single shaft gas turbine is a well proven engine that accumulates a very large number of fired hours. Thus, the anti surge margin pass 25%. Advanced 3D air foils are utilised for vanes and blades and the first three rows of stator blades are adjustable to optimize operability. The compressor rotor cold edge (the fixed point of gas turbine) accumulates the load flanges. (E. Fermi, 2002) This configuration guarantees reduced flange movement during gas turbine thermal transients. Thus, the temperatures at the turbine inlet and overall plant efficiency is recounted as:

Electrical output (kW): 11250

Electrical Efficiency (%): 31.4

Exhaust Flow (kg/sec): 47.5

Exhaust Temperature (C): 482

Overall Plant Efficiency

• Effect of compressor Inlet Temperature and Exhaust Flow Base load with Zero Inlet and zero exhaust pressure drops at sea level, 60% RH- Natural Gas

• Effect of Compressor inlet Temperature on Output and Heat Rate Base Load with zero inlet and zero exhaust pressure drops at sea level, 60% RH- Natural Gas

• Nominal steam production capability in cogeneration and combined cycle.

Determine the gravimetric composition of the exhaust gases assuming an overall equivalence ratio of 0.5

The gravimetric composition of the exhaust gases assuming an overall equivalence ratio of 0.5 is to be analyzed from data derived from such analysis machines. For demonstration the relative proportion of carbon monoxide in the exhaust of the internal combustion engine are then utilised to adjust the engine, in order that the exhaust gases will not exceed legally determined limits. Adjustment of the engine to provide for minimum noxious exhaust can be carried out, for demonstration, by adjusting the carburetor, or fuel injection systems of the internal combustion engine, to so control the fuel-air ratio being applied to the internal combustion engine that the exhaust emission will have a composition which contains ...