First Approximation Of Fuel Gas Consumption For Gas Turbine Driven Compressor Station

Thank you

Sir

Thanks for sharing this useful info.

I wanted to know if fuel-gas is pre-heated before it goes to turbine for combustion,will it reduce the fuel gas consumption of turbine??

If yes,Will it be same as the amount of fuel-gas/energy is used to pre-heat the fuel gas??

Regards

Aditya

Sir

Thanks for sharing this useful info.

 

I wanted to know if fuel-gas is pre-heated before it goes to turbine for combustion,will it reduce the fuel gas consumption of turbine??

 

If yes,Will it be same as the amount of fuel-gas/energy is used to pre-heat the fuel gas??

 

Regards

Aditya

Aditya,

Fuel Gas pre-heating in the Fuel Gas treatment unit is for maintaining the temperature well above its dew point. Generally keeping a fuel gas temperature of 50-55 deg C ensures that you are well above the dew point and there is no chance of any dangerous condensation and formation of liquid droplets which can damage the turbine.

GT manufacturers normally recommend optimum inlet temperature range. If the optimum fuel gas temperature cannot be obtained from the Fuel Gas Treatment Unit then additional heating would be required.

In such a case it is best to utilize any source of available and unutilized waste heat. In normal operations even the exhaust gases from the turbine can be utilized to pre-heat the fuel gas. For cold start-up, an alternative source of waste heat would be required. This will lead to operating expenditure (OPEX) savings. I will not call it exactly as energy savings

For large power generating turbines such as Frame 5 & Frame 6 I have seen the turbine exhaust gases connected to a WHRU unit for generating HP steam or providing hot oil (thermic fluid) for process plant heating. This is now a common practice in new chemical process plants which generate captive power using large gas turbines

Hope this helps.

Regards,

Ankur

Thank you sir.It really helped.

Regards

Aditya

Thank you so much