Thermodynamic analysis of coal-fired power plant based on the feedwater heater drainage-air preheating system

Wang, Di; Li, Haoyu; Wang, Chaonan; Zhou, Yunlong; Li, Xiaoli; Yang, Mei

doi:10.1016/j.applthermaleng.2020.116420

Cited by 19 publications

(3 citation statements)

References 28 publications

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“…Simulation calculations were carried out to utilize drain feedwater heaters as air heaters directed to the air preheater. The simulation results showed an efficiency increase of 41.7%, leading to an increase in power generation capacity up to 627.7 MW [8].…”

Section: Introductionmentioning

confidence: 96%

Performance Analysis of HP Heater with Comparison of the Number of Plugging Tubes in a 400 MW Coal-Fired Power Plant

Dwitama,

Widayat,

Suryo Utomo

et al. 2023

IRJIET

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Each of Units 1-4 SLA PGU has a capacity of 400 MW and seven feedwater heaters, namely three lowpressure feedwater heaters (LPH 1, 2, and 3), a deaerator, and three high-pressure feedwater heaters (HPH 5, 6, and 7). HPH 5 in Unit 2 has experienced 30% tube plugging, which is equivalent to 480 out of 1579 tubes. Plugging is expected to reduce the performance of HPH. If the plugging exceeds the maximum limit, the HPH needs to be retubed to restore equipment reliability. Furthermore, a comparison of the performance of HPH 5 was calculated with plugging variations of 0%, 22%, and 30% when the unit was at full load. The calculation results of terminal temperature difference (TTD), drain cooler approach (DCA), and log mean temperature difference (LMTD) showed an increase with the increase in plugging in HPH. Meanwhile, the calculation of heat rate and effectiveness showed a decrease caused by the additional plugging in the HPH. The largest heat transfer occurs in the condensing zone of the HPH, where the value is around 80% to 85% of the total heat transfer that occurs. All calculations of the relationship between performance parameters and HPH plugging variations have an R-square value of more than 0.67, indicating a strong relationship.

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Section: Introductionmentioning

confidence: 96%

Performance Analysis of HP Heater with Comparison of the Number of Plugging Tubes in a 400 MW Coal-Fired Power Plant

Dwitama,

Widayat,

Suryo Utomo

et al. 2023

IRJIET

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“…The objective of this algorithm is to predict the expected value of the performance degradation indicator. Wang et al [13] introduced a benchmark for the optimization of the operations of direct air-cooled combined heat and power plants. This benchmark is founded on the utilization of dynamic data mining technology.…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency State Identification for Cogeneration Units Based on Benchmark Value

Li,

Gu,

Wang

2023

Processes

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In China, cogeneration units predominantly employ a flexible operation mechanism. However, it is possible that this could lead to a decline in performance and an increase in energy consumption. This paper introduces a methodology that utilizes the data mining technique to ascertain the benchmark value section of the energy efficiency status index for cogeneration units. The equal interval division method is utilized for the purpose of categorizing the operating conditions. The Gaussian mixture model is utilized to ascertain the benchmark value section in relation to the fluctuating operating conditions by estimating the probability of historical data. The methodology is verified by utilizing historical data from a functioning cogeneration unit. The findings suggest that the unit’s total heat consumption can be decreased by 32.5–50 kJ·(kW·h)−1 when compared to the design-based approach.

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“…The efficiency of thermal power plants can be increased using various methods. It is proposed that the performance and maneuverability characteristics of TPP can be improved by condensate throttling [7], integrating high temperature thermal energy storage into the TPP heat balance diagram through an additional thermodynamic cycle [8], introducing new air preheating systems [9] and developing simulation models that precisely predict TPP behaviour at various loads [10].…”

mentioning

confidence: 99%

Switching 300 MW Power-Generating Units with Gas-and-Oil-Fired Boilers to Increased Load Mode

Mysak¹,

Kuznetsova²,

Martynyak-Andrushko³

2021

Energy eng. control syst.

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The goal of the research is to develop the guidelines for increasing the capacity of the operating 300 MW power-generating units by using the allowances assumed at the design computations and manufacture of the power-generating equipment, while preserving its reliability criteria and performance efficiency. The capacity of the operating power-generating units is increased in three stages. During the first stage, the technical state and operation conditions are established, measures aimed at increasing the capacity and increased load capabilities and reasons that may restrict them, as well as modernization and reconditioning measures are determined. The second stage includes developing technical solutions and reconstruction measures to increase the transfer capacity of the systems. At the third stage, the study and testing of the power-generating units’ equipment in the wide load range, including overload modes, are carried out with assessing and comparing the reliability criteria and efficiency indices. Technical measures intended to upgrade and modernize the equipment are low-cost. Most of them consist in ensuring the normal operating state of the existing main and auxiliary equipment of the power generating units.

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Thermodynamic analysis of coal-fired power plant based on the feedwater heater drainage-air preheating system

Cited by 19 publications

References 28 publications

Performance Analysis of HP Heater with Comparison of the Number of Plugging Tubes in a 400 MW Coal-Fired Power Plant

Performance Analysis of HP Heater with Comparison of the Number of Plugging Tubes in a 400 MW Coal-Fired Power Plant

Energy Efficiency State Identification for Cogeneration Units Based on Benchmark Value

Switching 300 MW Power-Generating Units with Gas-and-Oil-Fired Boilers to Increased Load Mode

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