Techno-economic analysis and optimization of the heat recovery of utility boiler flue gas

Xu, Gang; Huang, Shengwei; Yang, Yongping; Wu, Ying; Zhang, Kai; Xu, Chuanlong

doi:10.1016/j.apenergy.2013.04.048

Cited by 132 publications

(41 citation statements)

References 15 publications

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“…It has been confirmed by many commercial power units in China that the application of an exhaust heat recovery process can result in multiple advantages for the power plant, such as coal savings, water savings, and dust emission removal. [20][21][22] Of this, the low-temperature economizer (LTE) process [23][24][25][26] is currently applied on a practical level. However, it is noted by several literatures [27][28][29] that the conventional bypass flue (CBF), which was originally implemented in a 1000-MW brown coal-fired unit at the Niederaussem power plant in Germany in the 1990s, 30 has an obvious superiority than the LTE, whether in thermal economy or in techno-economic performance.…”

Section: Introductionmentioning

confidence: 99%

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

Wang

et al. 2018

Int J Energy Res

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The above article from the International Journal of Energy Research, published online on 5 March 2018 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief and John Wiley & Sons Ltd. The retraction has been agreed due to major overlap with another published article: Ma Y, Wang Z, Lu J, Yang L. Techno‐economic analysis of a novel hot air recirculation process for exhaust heat recovery from a 600 MW brown‐coal‐fired boiler, Energy, 152, 2018, 348–357, 10.1016/j.energy.2018.03.176

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Section: Introductionmentioning

confidence: 99%

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

Wang

et al. 2018

Int J Energy Res

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“…To achieve extra work, installed low temperature economizer after ESP takes place. Exergy analysis and economic analysis have been done and discussed on results [6].…”

Section: Literature Surveymentioning

confidence: 99%

District Heating and Power Generation Based Flue Gas Waste Heat Recovery

Özbek¹,

Karaoglu²

2017

European Mechanical Science

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In this study, integration of appropriate renewable methods are going to be applied on conventional coal fired steam power plant which has 660 MW full load capacity and including 4 Turbines (1 HP, 1 IP and 2 LP), one Benson type boiler and having multi pre heater stages for each unit. Steam parameters are 177 Bar and 541 o C super-heater section and 50 bar 539 o C for re-heater section. Primary fuel is coal except for startup and shut down operations. It is aimed by retrofitting some renewable energy methods on existing power plant, thus eliminating conventional type power plants adverse effects on thermodynamically, environmental and economic issues. One of the most important issue of conventional steam power plant operation is waste heat recovery management. A widespread techniques has been developed on this topic. It's possible to handle low grade heat by considering thermodynamic and environmental facts and also dealing with restrictions and opportunities after fulfilled feasibility study. In this study, it is being proposed waste heat recovery by combining OrganicRankine Cycle (ORC) with steam-Rankine cycle at available section. Brief summary of operation is ORC takes place after regenerative air preheater section and the target is to utilize waste heat of flue gas either via district heating or power generation up to few MW values. Depending upon the calculation and results additional modifications can further be needed as well.

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“…Based on the scaling up method [5, 29,30], the investment of the new added equipment and the related pump are estimated by the following equation:…”

Section: Estimation Of the Total Investment Costmentioning

confidence: 99%

“…For example, the German Schwarze Pumpe power plant (2×800 MW lignite generation units) implemented a flue gas division system after the electrostatic precipitator and recovered low-grade heat to heat up the condensed feedwater. Significant energy-saving effects have been reported [28,29]. In China, several 1000 MW scale coal-fired power plants, including the most efficient coal-fired power plant in the world (Waigaoqiao No.…”

Section: Introductionmentioning

confidence: 99%

An Improved System for Utilizing Low-Temperature Waste Heat of Flue Gas from Coal-Fired Power Plants

Huang

Tan

et al. 2017

Entropy

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Abstract:In this paper, an improved system to efficiently utilize the low-temperature waste heat from the flue gas of coal-fired power plants is proposed based on heat cascade theory. The essence of the proposed system is that the waste heat of exhausted flue gas is not only used to preheat air for assisting coal combustion as usual but also to heat up feedwater and for low-pressure steam extraction. Air preheating is performed by both the exhaust flue gas in the boiler island and the low-pressure steam extraction in the turbine island; thereby part of the flue gas heat originally exchanged in the air preheater can be saved and introduced to heat the feedwater and the high-temperature condensed water. Consequently, part of the high-pressure steam is saved for further expansion in the steam turbine, which results in additional net power output. Based on the design data of a typical 1000 MW ultra-supercritical coal-fired power plant in China, an in-depth analysis of the energy-saving characteristics of the improved waste heat utilization system (WHUS) and the conventional WHUS is conducted. When the improved WHUS is adopted in a typical 1000 MW unit, net power output increases by 19.51 MW, exergy efficiency improves to 45.46%, and net annual revenue reaches USD 4.741 million while for the conventional WHUS, these performance parameters are 5.83 MW, 44.80% and USD 1.244 million, respectively. The research described in this paper provides a feasible energy-saving option for coal-fired power plants.

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Techno-economic analysis and optimization of the heat recovery of utility boiler flue gas

Cited by 132 publications

References 15 publications

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

Retracted: Techno-economic analysis of a novel hot-air recirculation process for exhaust heat recovery from a 600-MW hard coal-fired boiler

District Heating and Power Generation Based Flue Gas Waste Heat Recovery

An Improved System for Utilizing Low-Temperature Waste Heat of Flue Gas from Coal-Fired Power Plants

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