A novel coolant cooling method for enhancing the performance of the gas turbine combined cycle

Moon, Seong Won; Kwon, Hyun Min; Kim, Tong Seop; Kang, Dong Won; Sohn, Jeong L.

doi:10.1016/j.energy.2018.07.035

Cited by 40 publications

(16 citation statements)

References 24 publications

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“…The effect of changes in the amount of blade cooling on turbine efficiency is greatly dependent on the compressor pressure ratio and COT . The film cooling method is extensively used for blade cooling . In this method, compressor air is extracted and supplied into the blades.…”

Section: Methodsmentioning

confidence: 99%

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Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants

2019

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Chemical‐looping combustion (CLC) is an innovative technology for power production with inherent carbon dioxide (CO2) capture. Even though CLC imposes no direct energy penalty for CO2 capture, previous works have shown significant energy penalties relative to natural gas (NG) combined cycle plants. This is due to the relatively low turbine inlet temperature (TIT), which is limited by the oxygen carrier used in the CLC process. Therefore, herein, an additional combustor (COMB) is included downstream of the CLC unit to raise the TIT (dependent on the CLC/COMB outlet temperature [COT] and the blade cooling). When NG is used in the additional COMB, the energy penalty is only 2.9% points with 72% CO2 capture. Achieving higher CO2 capture requires the use of H2 fuel in the COMB. The efficiency of the H2 production process plays an important role. For conventional H2 production with post‐combustion CO2 capture, the added COMB brings no improvement and the energy penalty is 8.8% points. For an advanced H2 production process (90% efficiency), the energy penalty reduces to 4.5% points with 100% CO2 capture. The results show the potential of CLC‐combined cycle power plants with an additional COMB to minimize the energy penalty of CO2 capture.

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Section: Methodsmentioning

confidence: 99%

“…The maximum blade material temperature allowed is usually between 800 and 900 °C . However, due to the application of thermal barrier coatings on turbine blades, the temperature could go higher.…”

Section: Methodsmentioning

confidence: 99%

Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants

2019

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“…Temperatur udara ambient memiliki pengaruh terhadap performa turbin gas [1,2]. Turbin gas yang terpasang di daerah dengan temperatur udara ambient tinggi seperti di kota Karawang, Indonesia, mengalami penurunan daya output dibandingkan dengan kemampuannya dari pabrikan, karena diuji kinerjanya pada temperatur 15°C sesuai dengan standart ISO [3].…”

Section: Pendahuluanunclassified

Perancangan Air Cooler Turbin gas Aeroderivative Lm6000 Jenis Compact Heat Exchanger Untuk Meningkatkan Performa Turbin gas

2020

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Temperatur udara ambient berpengaruh pada performa turbin gas. Temperatur yang tinggi mengakibatkan masa jenis udara menjadi rendah sehingga pada laju aliran udara masuk kompresor lebih sedikit. Teknologi untuk memitigasi permasalahan ini adalah penggunaan Turbine Inlet Air Cooling (TIAC) pada inlet air system turbin gas. Penelitian ini bertujuan untuk mendesain air cooler dengan tipe staggered continous finned tube compact heat exchanger pada turbin gas Lm6000 milik PT.X di Karawang. Proses perancangan air cooler dilakukan dengan menggunakan perhitungan Kern. Data yang dibutuhkan dalam penelitian ini adalah data dimensi maksimum air cooler, data temperatur air pendingin, data pengoperasi turbin gas dan data bahan bakar yang diambil sebelum dan sesudah pemasangan TIAC menggunakan beban turbin gas yang sama yaitu 22 MW. Hasil yang didapat dari proses perancangan air cooler adalah desain air cooler dengan 187 tube bundle dan nilai koefisien konveksi keseluruhan sebesar 35,4 W/m²°C. Analisis performa turbin gas menunjukkan bahwa temperatur inlet low pressure compressor mengalami penurunan rata-rata sebesar 3,5°C, sementara efisiensi siklus rata-rata meningkat sebesar 1,65%. Adapun peningkatan daya bersih rata-rata sebesar 0,496 MW karenanya dapat menghasilkan penghematan biaya bahan bakar sebesar Rp1.554.257.011 per tahun.

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“…Farzaneh-Gord and Deymi-Dashtebayaz [25] compared between three different cooling techniques (turbo-expanders, mechanical chiller, and evaporative media system) used to cool the air inlet to gas turbines. Moon et al [26] examined the influence of the turbine inlet temperature on a performance of gas turbines. Kwon et al [27] used the absorption chiller to pre-cool air inlet to gas turbine of combined cycle.…”

Section: Introductionmentioning

confidence: 99%

SFC Optimization of Gas Turbine Cycle Using Air Pre-cooling Unit: Performance Improvement

Ellaamy

El‐Agouz

Abdelgaied

2021

ERJ. Engineering Research Journal

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A critical issue concerning the gas turbine cycle of combined cycle power station is the reduction in net power output considerably with increasing ambient air temperature. The present simulation study aims to improve the performance of gas turbine cycle of combined cycle power station through use the fresh air handling units of mechanical chiller. To obtains the influence of use the mechanical chiller as pre-cooling units on a performance of gas turbine cycle, the thermodynamic analysis are used to simulate the performance of gas turbine cycle for three different operating loads (66.67, 83.33, and 100% full load). Based on results of the simulation analysis, the mechanical chiller which is inserted as a pre-cooling unit can; (i) increase the average monthly net power output by values varying between 7.33-18.17 MW compared to the original case without pre-cooling units; (ii) the rate of improvement in the average monthly net power output varies between 4.6-11% compared to the case without pre-cooling units; (iii) reduce the specific fuel consumption (SFC) by a rate varying between 5.21-10.81 kg fuel /MWh compared to the original case without pre-cooling units; and (iv) the saving in SFC reached to 4.4% compared to the original case without precooling units.

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A novel coolant cooling method for enhancing the performance of the gas turbine combined cycle

Cited by 40 publications

References 24 publications

Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants

Efficiency Improvement of Chemical Looping Combustion Combined Cycle Power Plants

Perancangan Air Cooler Turbin gas Aeroderivative Lm6000 Jenis Compact Heat Exchanger Untuk Meningkatkan Performa Turbin gas

SFC Optimization of Gas Turbine Cycle Using Air Pre-cooling Unit: Performance Improvement

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