Oxyfuel PFBC-CC Power Generation Process

2010 ◽  
Author(s):  
Shimin Deng ◽  
Rory Hynes
Keyword(s):  
Power Generation ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Combined Cycle ◽  
Base Case ◽  
Exhaust Gas ◽  
Generation Process ◽  
New Process ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

In this paper, a new power generation process based on oxyfuel and PFBC-CC is proposed, which has advantages in thermal performance, emissions and footprint. Five cases in total are modeled by using Aspen Plus™ and GateCycle™. The simulation indicates that the efficiency of the new process is 4% higher than existing ambient oxyfuel power generation process. The performance of the base case is compared with two existing oxyfuel cases to identify the potentials of the new process. Thermodynamic benefit of the new process is reasonably explained by introducing a concept of “non-stack combined cycle”. The waste heat recovery from gas turbine exhaust gas is discussed and compared. In addition, impacts on performance of key parameters are investigated.

scholarly journals Multiple Evaporation Steam Bottoming Cycle

1997 ◽  
Author(s):  
H. Jericha ◽  
M. Fesharaki ◽  
A. Seyr
Keyword(s):  
Gas Turbine ◽  
Steam Line ◽  
Combined Cycle ◽  
Steam Flow ◽  
Feed Water ◽  
Exhaust Gas ◽  
Gas Cooling ◽  
Gas Turbine Exhaust ◽  
Cycle Efficiency ◽  
Turbine Exhaust

Improvements to the steam bottoming cycles hold the promise of raising the combined cycle thermal efficiency to values near and above 60%. Up to now, steam bottoming cycles with three pressure levels of steam evaporation have been realised. A further advantage seems possible by the use of double fluids, such as mixtures of steam and ammonia. In the cycle proposed here, the authors limit Themselves to the use of steam and water only, in order to avoid all the difficulties, that may arise from such mixtures. The solution given here, relies on multiple evaporation levels, more than three up to five and even more. They should be to be achieved with the help of newly developed steam turbochargers, which allow the unification of the steam flow from three different neighbouring pressure levels, into one steam flow to be transmitted via the live steam line to the main turbine. This large number of evaporation levels, together with the required economisers for feed water heating and the ensuing superheaters arranged in the proper way, gives a steam water heat acceptance curve, which can be closely matched to the exhaust gas cooling line, so that the heat transfer from the gas turbine exhaust to the steam bottoming cycle can be effected with a minimum of temperature differences. It should be pointed out that the steam pressures are selected in the undercritical region, and that a total combined cycle efficiency very near to 60% can be achieved. Using most modern gas turbine models together with this novel bottoming cycle will even allow to exceed the value of 60%. Examples given have been calculated for standard gas turbine models.

scholarly journals Gas-Turbine Drives for a Fluid Catalytic-Cracking Unit

1964 ◽  
Author(s):  
James A. Boatright
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Operating Experience ◽  
Recovery Boilers ◽  
Full Speed ◽  
Forced Draft ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

This paper presents a unique application of two 14,200-hp gas turbines and their associated waste heat-recovery boilers in a refinery modernization program. It summarizes economics, design, and operating experience. Special emphasis is placed on three unusual features: (1) oversized starting turbines used as helpers; (2) control of two drivers with one governor; and (3) use of gas-turbine exhaust as combustion air, backed up by a forced-draft fan running at full speed against a closed damper.

scholarly journals Transient Simulation of a Waste Heat Recovery from Gas Turbine Exhaust

2016 ◽  
Vol 17 (1) ◽  
pp. 22-31
Author(s):  
Meseret Nasir Reshid ◽  
Wan Mansor Wan Muhamad ◽  
Mohd Amin Abd Majid
Keyword(s):  
Gas Turbine ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Transient Simulation ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust
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