Thermodynamic performance analysis and algorithm model of multi-pressure heat recovery steam generators (HRSG) based on heat exchangers layout

Feng, Hongcui; Zhong, Weimin; Wu, Yanling; Tong, Shuiguang

doi:10.1016/j.enconman.2014.02.060

Cited by 30 publications

(16 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Waste heat recovery, renewable energy utilization, cogeneration, combined cycle power generation and energy storage have all attracted much interest (Liang et al, 2013;Kuravi et al, 2013;Uchida et al, 2013;El-Khattam and Salama, 2004;Nag and De;. Waste heat is available from many industries and can be used for power generation using a heat recovery steam generator (HRSG) (Feng et al, 2014;Karellas et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effects of Oxy-Fuel Combustion on Performance of Heat Recovery Steam Generators

Self

Rosen

Reddy

2018

European Journal of Sustainable Development Research

View full text Add to dashboard Cite

The performance of steam power plants, utilizing recovered waste heat from air-fuel and oxy-fuel combustion, are compared. Temperature profiles in the heat recovery steam generator (HRSG), steam production rate, network output and energy efficiency are simulated for different conditions. Investigations are made into the effect of varying pinch point on HRSG performance, network and energy efficiency for power generation utilizing oxy-fuel combustion. It is found that with increased pinch point there is an associated decrease in HRSG and steam plant efficiencies. Exhaust gas composition influences the energy efficiency of the power plant. When air-fuel and oxy-fuel combustion are compared there is a reduced amount of nitrogen in the oxidant stream in the latter case. When comparing air-fuel and oxy-fuel combustion, a considerable deviation in HRSG and steam power plant performance is exhibited, with oxyfuel combustion offering benefits in system efficiency and plant output. The exhaust gas composition at the HRSG inlet contributes significantly the performance characteristics of the system. Raising the HRSG inlet temperature also increases power generation and system efficiency. The results provide insights into the use of oxy-fuel combustion for systems utilizing HRSG for power generation while demonstrating the influence of gas composition, pinch point, and exhaust gas temperature on system performance, and suggest that oxyfuel combustion can help enhance the contribution to sustainable development of some energy systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Oxy-Fuel Combustion on Performance of Heat Recovery Steam Generators

Self

Rosen

Reddy

2018

European Journal of Sustainable Development Research

View full text Add to dashboard Cite

show abstract

“…HRSG has been widely investigated from many aspects, such as the application of genetic algorithms in structural design [2], once-through HRSG modelling and design [3], HRSG pressure level selection [4], and the effect of heat transfer surface layout on HRSG thermal performance [5]. In addition, HRSG key parameter design and optimization have elicited an increasing amount of attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic performance simulation and concise formulas for triple-pressure reheat HRSG of gas–steam combined cycle under off-design condition

Zhang

Zheng

Yang

et al. 2016

Energy Conversion and Management

View full text Add to dashboard Cite

“…Meanwhile, adopting properly organized soot-blowing technology can eliminate the more serious problem of ash accumulation during the biomass fuel combustion process. Feng et al [21] built a model of multi-pressure heat recovery steam generator (HRSG) based on the laws of thermodynamics and incorporated energy balance equations for heat exchangers while analyzing flue gas and water/steam parameters such as temperature, pressure, steam mass flow rate and the heat efficiency of different heat exchangers. Tong et al [22] developed a model to solve the heat transfer calculation of multi-sectional regenerative air heaters (which usually have several layers), and they designed a computational procedure through which to carry out the model.…”

Section: Introductionmentioning

confidence: 99%

Online Ash Fouling Prediction for Boiler Heating Surfaces based on Wavelet Analysis and Support Vector Regression

et al. 2019

Self Cite

View full text Add to dashboard Cite

Depending on its operating conditions, traditional soot blowing is activated for a fixed time. However, low-frequency soot blowing can cause heat transfer efficiency to decrease. High-frequency soot blowing not only wastes high-pressure steam, but also abrades surface pipes, reducing the working life of a heat exchange device. Therefore, it is necessary to design an online ash fouling monitoring system to perform soot blowing that is dependent on the status of ash accumulation. This study presents an online monitoring model of ash-layer thermal resistance that reflects the degree of ash fouling. A wavelet threshold denoising algorithm was applied to smooth the thermal resistance of the ash layer calculated by the heat balance mechanism model. Thus, the variation in thermal resistance becomes more visible, which is more conducive to optimizing the operation of soot blowing. The designed Support Vector Regression (SVR) model could achieve the online prediction of thermal resistance denoising for low-temperature superheaters. Experimental analysis indicates that the prediction accuracy was 98.5% during the testing phase. By using the method proposed in this study, online monitoring of heating surfaces during the ash fouling process can be realized without adding complicated and expensive equipment.

show abstract

Thermodynamic performance analysis and algorithm model of multi-pressure heat recovery steam generators (HRSG) based on heat exchangers layout

Cited by 30 publications

References 21 publications

Effects of Oxy-Fuel Combustion on Performance of Heat Recovery Steam Generators

Effects of Oxy-Fuel Combustion on Performance of Heat Recovery Steam Generators

Thermodynamic performance simulation and concise formulas for triple-pressure reheat HRSG of gas–steam combined cycle under off-design condition

Online Ash Fouling Prediction for Boiler Heating Surfaces based on Wavelet Analysis and Support Vector Regression

Contact Info

Product

Resources

About