Thermodynamic Analysis of New Combination of Supercharged Boiler Cycle and Heat Recovery Cycle for Power Generation

Akiba, Masashi; Thani, E. A.

doi:10.1115/1.2816611

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…Xiang and Chen [12] scrutinized a threepressured HRSG integrated with a general electric (GE) gas turbine, emphasizing efficiency improvement and exergy loss reduction through HRSG operating parameter optimization. Cogeneration plants, utilizing both gas and steam turbine cycles, have been introduced, exploring cumulative efficiency improvement strategies [13,14,20]. Raising the gas turbine inlet temperature to 1427 • C in a combined cycle has been identified as a potential avenue to achieve an overall efficiency of 60% [13].…”

Section: Literature Reviewmentioning

confidence: 99%

Investigation of a Hybridized Cascade Trigeneration Cycle Combined with a District Heating and Air Conditioning System Using Vapour Absorption Refrigeration Cooling: Energy and Exergy Assessments

Agberegha,

Aigba,

Nwigbo

et al. 2024

Energies

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The insufficiency of energy supply and availability remains a significant global energy challenge. This work proposes a novel approach to addressing global energy challenges by testing the supercritical property and conversion of low-temperature thermal heat into useful energy. It introduces a combined-cascade steam-to-steam trigeneration cycle integrated with vapour absorption refrigeration (VAR) and district heating systems. Energetic and exergetic techniques were applied to assess irreversibility and exergetic destruction. At a gas turbine power of 26.1 MW, energy and exergy efficiencies of 76.68% and 37.71% were achieved, respectively, while producing 17.98 MW of electricity from the steam-to-steam driven cascaded topping and bottoming plants. The cascaded plant attained an energetic efficiency of 38.45% and an exergy efficiency of 56.19%. The overall cycle efficiencies were 85.05% (energy) and 77.99% (exergy). More than 50% of the plant’s lost energy came from the combustion chamber of the gas turbine. The trigeneration system incorporated a binary NH3–H2O VAR system, emphasizing its significance in low-temperature energy systems. The VAR system achieved a cycle exergetic efficiency of 92.25% at a cooling capacity of 2.07 MW, utilizing recovered waste heat at 88 °C for district hot water. The recovered heat minimizes overall exergy destruction, enhancing thermal plant performance.

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Section: Literature Reviewmentioning

confidence: 99%

Investigation of a Hybridized Cascade Trigeneration Cycle Combined with a District Heating and Air Conditioning System Using Vapour Absorption Refrigeration Cooling: Energy and Exergy Assessments

Agberegha,

Aigba,

Nwigbo

et al. 2024

Energies

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“…Because Refs. [1][2][3] only introduced its new developments and applications, research interests are being excited and research papers are being published frequently in China. Ref.…”

Section: Introductionmentioning

confidence: 99%

Stress Problems at the Steam Drum Fatigue Checking Point of a Supercharged Boiler

Zheng

Liu²,

Chen³

et al. 2011

AMR

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On the basis of the proposed computing method for the low-cycle fatigue lifetime of a supercharged boiler steam drum, and the two computing principles, which super-pose the resultant stress of the internal pressure stress and the radial temperature difference heat stress at the boiler steam drum fatigue checking point, whose influences on the low-cycle fatigue lifetimes of one supercharged boiler steam drum were calculated, compared and analyzed, there out the computing principle of a supercharged boiler for superposing the resul-tant stress of the above-mentioned two stresses was opened out. The simplified computing method, which will be applied to calculating the alternating stress range in a stress cycle at the supercharged boiler steam drum fatigue checking point, was also derived from combining the design feature of a super-charged boiler steam drum with theory analysis, and com-paring with the Chinese Standard computing method, this computing method not only can reduce the calculational work-load, but also can simplify the calculational steps greatly. Thereby the proposed computing method for the low-cycle fatigue lifetime of a supercharged boiler steam drum was also further simplified.

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“…In a supercharged boiler, the steam drum is an important com-ponent and plays a central role, so its lifetime is of apparent importance. However, for the supercharged boiler, previous papers mostly concentrated on its new developments and applications [1][2][3], combustion and heat transfer [4], hy-draulic characteristics [5], control technologies and models [6][7][8], shock resistance characteristics [9,10], as well as the technologies and applications of turbocharging units [11,12].…”

Section: Introductionmentioning

confidence: 99%

Feasibility for the Application of the Temperature Difference Computing Method Based on the Simplified Solution of the Radial Temperature for a Boiler Steam Drum Wall to a Supercharged Boiler

Zheng

Wang

Chen

et al. 2011

AMR

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The radial temperature difference calculation of a steam drum wall is an important step in the process of calculating the low-cycle fatigue lifetime of a steam drum. So the German Standard TRD301 recommended a temperature difference computing method based on the simplified solution for the radial temperature of a steam drum wall. In order to validate the feasibility for the application of this computing method to solving the same problem of a supercharged boiler, on the basis of the reasonable simplifications to the unstable heat conduction problem across a steam drum wall, its heat-conduction equations and definite conditions were determined, then the analytical solution for the radial temperature of a steam drum wall, together with its approximate and simplified solutions, is derived. The running example of one super-charged boiler was calculated and analyzed by use of the radial temperature difference computing methods based on the approximate and simplified solutions respectively. The com-puted results show that the German Standard computing method of TRD301 has great limitations in the same problem calculation of a supercharged boiler, and it can’t apply to the researches on the same problem and its relevant problems of a supercharged boiler as a universal computing method.

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Thermodynamic Analysis of New Combination of Supercharged Boiler Cycle and Heat Recovery Cycle for Power Generation

Cited by 6 publications

References 2 publications

Investigation of a Hybridized Cascade Trigeneration Cycle Combined with a District Heating and Air Conditioning System Using Vapour Absorption Refrigeration Cooling: Energy and Exergy Assessments

Investigation of a Hybridized Cascade Trigeneration Cycle Combined with a District Heating and Air Conditioning System Using Vapour Absorption Refrigeration Cooling: Energy and Exergy Assessments

Stress Problems at the Steam Drum Fatigue Checking Point of a Supercharged Boiler

Feasibility for the Application of the Temperature Difference Computing Method Based on the Simplified Solution of the Radial Temperature for a Boiler Steam Drum Wall to a Supercharged Boiler

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