A Water-Wall Model of Supercritical Once-Through Boilers Using Lumped Parameter Method

Go, Geon; Moon, Un-Chul

doi:10.5370/jeet.2014.9.6.1900

Cited by 8 publications

(6 citation statements)

References 18 publications

(31 reference statements)

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“…Compression ratio is one of the most influential parameters of the thermal efficiency value of the Brayton cycle [18]. The pressure of the atmospheric mixture with the biogas fuel in the combustion chamber depends on the optimized compression ratio.…”

Section: Gas Turbine Cycle (Brayton Cycle)mentioning

confidence: 99%

Thermodynamic Analysis of Once-through Heat Recovery Steam Generator in a Combined Cycle Power Plants Fueled with Biogas

Ardiyati,

Supriadi,

Anwar

et al. 2024

E3S Web Conf.

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The working principle of the combined cycle in the combined cycle power plant (CCPP) is to utilize a certain amount of waste heat in the gas turbine, which reaches temperatures of 1650°C, to generate steam in the steam turbine. Due to the high temperature of the exhaust gas in the gas turbine, a device is needed to recover this waste heat, known as a Heat Recovery Steam Generator (HRSG). Compared to conventional HRSG, a once-through heat recovery steam generator (OTHRSG) offers the advantages of faster design time (25% faster than conventional) and lower design costs because it does not require a drum which contributes to an increase in thermal efficiency. This study aims to model and simulate the CCPP system with an OTHRSG to achieve maximum thermal efficiency by using biogas from the degradation of organic waste as the input fuel for CCPP using Cycle Tempo software. The thermal efficiency of the CCPP system was achieved at 57% by applying turbine inlet temperature (TIT) of 1500°C and compression ratio of 46. These results proved that the CCPP system by using biogas as fuel could increase the thermal efficiency of a single cycle power plant.

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Section: Gas Turbine Cycle (Brayton Cycle)mentioning

confidence: 99%

Thermodynamic Analysis of Once-through Heat Recovery Steam Generator in a Combined Cycle Power Plants Fueled with Biogas

Ardiyati,

Supriadi,

Anwar

et al. 2024

E3S Web Conf.

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“…This nonlinear model was also developed based on mass, momentum, and energy balances. It is a field-proven simulator for the power plant control logic design in industry [26,30,31].…”

Section: -Mw Drum-type Thermal Power Plantmentioning

confidence: 99%

“…This nonlinear model was also developed based on mass, Energies 2020, 13, 226 9 of 15 momentum, and energy balances. It is a field-proven simulator for the power plant control logic design in industry[26,30,31].Energies 2019, 12, x FOR PEER REVIEW 9 of The conventional cross-limiting algorithm is equipped in this model, and the values of α1 and α2 were set to 5%. Schematic of a 1000 MW once-through-type thermal power plant.…”

mentioning

confidence: 99%

Supplementary Control of Air–Fuel Ratio Using Dynamic Matrix Control for Thermal Power Plant Emission

et al. 2020

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This paper proposes a supplementary control for tighter control of the air–fuel ratio (AFR), which directly affects the environmental emissions of thermal power plants. Dynamic matrix control (DMC) is applied to the supplementary control of the existing combustion control loops and the conventional double cross limiting algorithm for combustion safety is formulated as constraints in the proposed DMC. The proposed supplementary control is simulated for a 600-MW drum-type power plant and 1000 MW ultra-supercritical once-through boiler power plant. The results show the tight control of the AFR in both types of thermal power plants to reduce environmental emissions.

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“…Niu et al developed a dynamic model of an entire supercritical boiler–turbine unit using first-principles models combined with data-driven approaches for use in analyzing low-load operation, but to simplify the model, the physical property changes during the transition were neglected . This simplification was also made by Go and Moon for easier convergence of their supercritical water wall model . Liu et al developed another lumped-parameter model of an ultra-supercritical boiler where the steam in the separator was chosen as representative of the boiler condition such that the position of phase change within the water wall could be neglected as the boiler transitions to lower loads .…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling, Parameter Estimation, and Data Reconciliation of a Supercritical Pulverized Coal-Fired Boiler

Hedrick

Omell

et al. 2022

Ind. Eng. Chem. Res.

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A high-fidelity, spatially distributed dynamic model of a supercritical pulverized coal-fired boiler was developed for calculating transient thermal profiles of the boiler tubes, which are often not measured or unmeasurable in industrial settings due to the harsh operating conditions. Rigorous models of the subcritical and supercritical steam properties, which can be highly nonlinear, were used to capture the transition between two-phase and one-phase flow, respectively, as supercritical boilers frequently transition through the critical point during load-following operation. The transient boiler model was also used for data reconciliation and parameter estimation for the purpose of model validation against industrial data. An approach was developed to reduce the size of the large-scale reconciliation problem by focusing on the implementation of bias terms for the reconciled variables, which can be estimated in place of the reconciled variables themselves. In addition, a functional approximation of the reconciliation problem was defined so that it can be more simply optimized. Combining this functional approximation optimization with reformulation of the reconciliation problem considering measurement biases can significantly improve the tractability of many such large-scale problems. The validated boiler model was then used to study transient responses under load-following operation with specific attention on the calculation of unmeasurable variables.

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A Water-Wall Model of Supercritical Once-Through Boilers Using Lumped Parameter Method

Cited by 8 publications

References 18 publications

Thermodynamic Analysis of Once-through Heat Recovery Steam Generator in a Combined Cycle Power Plants Fueled with Biogas

Thermodynamic Analysis of Once-through Heat Recovery Steam Generator in a Combined Cycle Power Plants Fueled with Biogas

Supplementary Control of Air–Fuel Ratio Using Dynamic Matrix Control for Thermal Power Plant Emission

Dynamic Modeling, Parameter Estimation, and Data Reconciliation of a Supercritical Pulverized Coal-Fired Boiler

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