scholarly journals Εnergy-exergy analysis of ultra-supercritical biomass-fuelled steam power plants for industrial CHP, district heating and cooling

2020 ◽  
Vol 154 ◽  
pp. 252-269 ◽  
Author(s):  
Konstantinos Braimakis ◽  
Despina Magiri-Skouloudi ◽  
Dimitrios Grimekis ◽  
Sotirios Karellas
Keyword(s):  
Power Plants ◽  
Exergy Analysis ◽  
District Heating ◽  
Steam Power ◽  
Heating And Cooling ◽  
Steam Power Plants

Exergy Analysis of Steam Power Plants

Exergy ◽  
2013 ◽  
pp. 261-284 ◽  
Author(s):  
Ibrahim Dincer ◽  
Marc A. Rosen
Keyword(s):  
Power Plants ◽  
Exergy Analysis ◽  
Steam Power ◽  
Steam Power Plants

scholarly journals Numerical method for determining the allowable medium temperature during transient operation of a thick-walled boiler element in power plant

2011 ◽  
Vol 32 (4) ◽  
pp. 91-99
Author(s):  
Dariusz Rząsa ◽  
Piotr Duda
Keyword(s):  
Power Plant ◽  
Numerical Method ◽  
Power Plants ◽  
Transient Operation ◽  
Medium Temperature ◽  
Steam Power ◽  
Construction Element ◽  
Heating And Cooling ◽  
Steam Power Plants ◽  
Optimum Parameters

Numerical method for determining the allowable medium temperature during transient operation of a thick-walled boiler element in power plant Secure and cost-effective power generation has become very important nowdays. Care must be taken while designing and operating modern steam power plants. There are regulations such as German boiler regulations (Technische Regeln für Dampfkessel 301) or European Standards that guide the user how to operate the steam power plants. However, those regulations are based on the quasi-steady state assumption and one dimensional temperature distribution in the entire element. This simplifications may not guarantee that the heating and cooling operations are conducted in the most efficient way. Thus, it was important to find an improved method that can allow to establish optimum parameters for heating and cooling operations. The optimum parameters should guarantee that the maximum total stresses in the construction element are in the allowable limits and the entire process is conducted in the shortest time. This paper summarizes mathematical descriptions how to optimize shut down process of power block devices. The optimization formulation is based on the assumption that the maximum total stresses in the whole construction element should be kept within allowable limits during cooling operation. Additionally, the operation should be processed in the shortest time possible.

EXERGY ANALYSIS OF STEAM POWER PLANTS

EXERGY ◽  
2007 ◽  
pp. 229-256
Author(s):  
Ibrahim Dincer ◽  
Marc A. Rosen
Keyword(s):  
Power Plants ◽  
Exergy Analysis ◽  
Steam Power ◽  
Steam Power Plants

scholarly journals Computer - Aided Evaluation of Steam Power Plants Performance Based on Energy and Exergy Analysis

2017 ◽  
Vol 6 (2) ◽  
pp. 2210-2219
Author(s):  
AHMED NOAMAN AHMED KAMAL EL-ZAYATI ◽  
EED A. ABDEL-HADI, ◽  
SHERIF H. TAHER ◽  
ISLAM H. ABDEL-AZIZ
Keyword(s):  
Power Plants ◽  
Exergy Analysis ◽  
Steam Power ◽  
Steam Power Plants ◽  
Energy And Exergy ◽  
Computer Aided ◽  
Energy And Exergy Analysis

scholarly journals Study of the effect of using duct burner on the functional parameters of the two repowered cycles through exergy analysis

2017 ◽  
Vol 21 (6 Part B) ◽  
pp. 3011-3023 ◽  
Author(s):  
Mehrabani Maghsoudi ◽  
Abdollah Mehrpanahi ◽  
Vahid Rouhani ◽  
Naser Nikbakht
Keyword(s):  
Power Generation ◽  
Steam Generator ◽  
Heat Recovery ◽  
Power Plants ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Heat Recovery Steam Generator ◽  
Steam Power ◽  
Steam Power Plants ◽  
Duct Burner

Steam power plants have been extensively used in Iran for a long time, yet no specific step has been taken for promoting their performance. In this regard, full repowering is considered as a way to enhance the performance of steam power plants. Furthermore, because of the continental condition of Iran, duct burners can be used as a common strategy to compensate for power generation shortage caused by environmental conditions. In this study, the effect of using a duct burner on the full repowering of Be?sat Steam Cycle representing both single-and dual-pressure cycles was investigated based on exergy analysis. The results showed that by using the duct burner, due to the increase in the heat recovery steam generator inlet gas temperature, the general thermal efficiency of the combined cycle and the exergy efficiency of the combined cycle and heat recovery steam generator decreased. However, the results revealed an increase in the stack temperature and resulting exergy losses, steam flow and power generation.

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