Thermodynamic and Economic Analysis of Advanced and Externally Fired Gas Turbine Cycles

Ilett, T; Lawn, Chris

doi:10.1243/09576509jpe967

Cited by 6 publications

(6 citation statements)

References 34 publications

(49 reference statements)

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“…It is clear that this innovative regenerative system must have costs that are in the same order of magnitude as conventional heat exchanger designs in order to remain cost competitive. Here, cost figures published by Ilett and Lawn [39] are used. Calculating the cost difference between conventional combined cycle plants and externally fired ones results in a specific heat exchanger cost target of 64 kUSD per kg/s of air flow (topping Brayton cycle compressor air flow).…”

Section: High-temperature Heat Exchanger Costs For Powering the Toppimentioning

confidence: 99%

Techno-Economic Optimization and Benchmarking of a Solar-Only Powered Combined Cycle with High-Temperature TES Upstream the Gas Turbine

Zaversky¹,

Les²,

Sánchez³

et al. 2020

Green Energy and Environment

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This work presents a techno-economic parametric study of an innovative central receiver solar thermal power plant layout that applies the combined cycle (CC) as thermodynamic power cycle and a multi-tower solar field configuration together with open volumetric air receivers (OVARs). The topping gas turbine (GT) is powered by an air-air heat exchanger (two heat exchanger trains in the case of reheat). In order to provide dispatchability, a high-temperature thermocline TES system is placed upstream the gas turbine. The aim is threefold, (i) investigating whether the multi-tower concept has a techno-economic advantage with respect to conventional single-tower central receiver plants, (ii) indicating the technoeconomic optimum power plant configuration, and (iii) benchmarking the technoeconomic optimum of the CC plant against that of a conventional single-cycle Rankine steam plant with the same receiver and TES technology. It is concluded that the multi-tower configuration has a techno-economic advantage with respect to the conventional single-tower arrangement above a total nominal solar power level of about 150 MW. However, the benchmarking of the CC against a Rankine single-cycle power plant layout shows that the CC configuration has despite its higher solar-to-electric conversion efficiency a higher LCOE. The gain in electricity yield is not enough to outweigh the higher investment costs of the more complex CC plant layout.

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Section: High-temperature Heat Exchanger Costs For Powering the Toppimentioning

confidence: 99%

Techno-Economic Optimization and Benchmarking of a Solar-Only Powered Combined Cycle with High-Temperature TES Upstream the Gas Turbine

Zaversky¹,

Les²,

Sánchez³

et al. 2020

Green Energy and Environment

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“…The results of the performance enhancing strategies (PES) are then used for validating the data of a real GT performance. Figure 1 shows the schematic diagram for a simple GT [20]. The compressors draw the air that is subsequently transmitted to the combustion chamber.…”

Section: Modelling Of Complex Gas Turbinementioning

confidence: 99%

“…Thermal efficiency of GT cycle depends upon the increase the effectiveness of regenerated heat exchanger. The performance of simple GT cycle, number of advance GT cycles and equivalent CCGT cycles are extracted from optimum efficiencies and work out puts used in thermodynamic analysis by Ilett and Lawn [20]. However, it is found that performance of advanced CCGT cycles is comparatively better than the performance of simple GT cycle.…”

Section: Introductionmentioning

confidence: 99%

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Ibrahim

Rahman

Ali

et al. 2016

MATEC Web of Conferences

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Gas turbines (GT) have come to play a significant role in distributed energy systems due to its multi-fuel capability, compact size and low environmental impact and reduced cost. Nevertheless, the low electrical efficiency, typically about 30% (LHV), is an important obstruction to the development of the GT plants. New strategies are designed for the GT plant, to increase the overall performance based on the operational modeling and optimization of GT power plants. The enhancing strategies effect on the GT power plant's performance (with intercooler, twoshaft, reheat and regenerative) based on the real power plant of GT. An analysis based on thermodynamics has been carried out on the modifications of the cycle configurations' enhancements. Then, the results showed the effect of the ambient and turbine inlet temperatures on the performance of the GT plants to select an optimum strategy for the GT. The performance model code to compare the strategies of the GT plants were developed utilizing the MATLAB software. The results show that, the best thermal efficiency occurs in the intercooler-regenerative-reheated GT strategy (IRHGT); it decreased from 51.5 to 48%, when the ambient temperature increased (from 273 to 327K). Furthermore, the thermal efficiency of the GT for the strategies without the regenerative increased (about 3.3%), while thermal efficiency for the strategies with regenerative increased (about 22%) with increased of the turbine inlet temperature. The lower thermal efficiency occurs in the IHGT strategy, while the higher thermal efficiency occurs in the IRHGT strategy. However, the power output variation is more significant at a higher value of the turbine inlet temperature. The simulation model gives a consistent result compared with Baiji GT plant. The extensive modeling performed in this study reveals that; the ambient temperature and turbine inlet temperature are strongly influenced on the performance of GT plant.

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“…In [44], an economic analysis of advanced and EFGT cycles was made by estimating the capital, operating, and maintenance specific costs. The specific capital cost of a power plant of 1 MW el size was calculated to be 540 £ (ca.…”

Section: Introductionmentioning

confidence: 99%

Determination of Optimized Parameters for the Flexible Operation of a Biomass-Fueled, Microscale Externally Fired Gas Turbine (EFGT)

et al. 2016

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Biomass as a source of renewable energy is a promising solution for current problems in energy supply. Olive waste is considered as an interesting option, especially for Mediterranean countries. Within this paper, a microscale externally fired gas turbine (EFGT) technology is presented as a decentralized power plant, within the range of 15 kW th , based on olive residues. It was modeled by Aspen Plus 8.6 software to provide a sufficient technical study for such a plant. Optimized parameters for pressure ratio and turbine air-mass flow have been mapped for several loads to provide information for process control. For all cases, mechanical output, efficiency curves, and back-work ratio have been calculated. Using this information, typical plant sizes and an example of power production are discussed. Additionally, achievable energy production from olive waste is estimated on the basis of this data. The results of this study show that such a plant has an electrical efficiency of 5%-17%. This variation is due to the examination being performed under several combustion temperatures, actual load, heat exchanger temperatures, and heat transfer efficiency. A cost estimation of the discussed system showed an estimated capital cost of 33,800 to 65,300 € for a 15 kW th system.

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Thermodynamic and Economic Analysis of Advanced and Externally Fired Gas Turbine Cycles

Cited by 6 publications

References 34 publications

Techno-Economic Optimization and Benchmarking of a Solar-Only Powered Combined Cycle with High-Temperature TES Upstream the Gas Turbine

Techno-Economic Optimization and Benchmarking of a Solar-Only Powered Combined Cycle with High-Temperature TES Upstream the Gas Turbine

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Determination of Optimized Parameters for the Flexible Operation of a Biomass-Fueled, Microscale Externally Fired Gas Turbine (EFGT)

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