In a newly developed innovative idea brought up by CSIR in India, gas turbine exhaust gas are being utilized to convert feedwater into steam. Certain data of the experiment are as follows: mass flow rate of exhaust gas = 40 kg/hr, enthalpy of exhaust gas at the time of their exit from gas turbine is 600 kJ/kg, steam turbine output as measured by brake dynamometer = 60 hp-sec, thermal efficiency of steam power plant is 0.25, efficiency of exhaust gas in converting feedwater into steam is taken as 50%. Find the enthalpy of exhaust gas remaining after they generate steam from feedwater?

Turbine Thermodynamics and Efficiency topics include: Basics of thermodynamics, carnot, rankine and reheat cycles, temperature and pressure effect on cycle efficiency, heat and steam rate, sterling cycle, ericsson cycle, intercooling, reheating and regeneration. Turbine efficiency is the ratio of the turbine's actual work output to the net input energy. It's also known as the power coefficient.  The efficiency of an ideal turbine would be 100%, meaning it would convert all input energy into output work without losing energy to heat or other forms. However, this is not possible due to... Show more

Turbine Thermodynamics and Efficiency topics include: Basics of thermodynamics, carnot, rankine and reheat cycles, temperature and pressure effect on cycle efficiency, heat and steam rate, sterling cycle, ericsson cycle, intercooling, reheating and regeneration.

Turbine efficiency is the ratio of the turbine's actual work output to the net input energy. It's also known as the power coefficient. 

The efficiency of an ideal turbine would be 100%, meaning it would convert all input energy into output work without losing energy to heat or other forms. However, this is not possible due to factors like friction and heat loss. 
The efficiency of a gas turbine is complicated to calculate because of the dynamic vapor conditions. These conditions depend on the type of fuel and atmospheric conditions. 

The overall balance equation for a gas turbine is:
Shaft Power: = Fuel Energy - Power Required for Compression - Exhaust Energy - Mechanical Losses 

The performance of the cycle can be evaluated using two parameters: the thermal efficiency and the work output. 
The efficiency can be expressed as:
η: = W / Q1
Q1: is the heat supplied to the cycle
W: is the work output 

In thermodynamics, the calculation of work done by a turbine also takes into account factors like temperature, pressure, and entropy. 

Related Test: Steam and Gas Turbines Practice Test: The Basics

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