scholarly journals Exergy analysis and economic evaluation of the steam superheat utilization using regenerative turbine in ultra-supercritical power plants under design/off-design conditions

2017 ◽  
Vol 5 (3) ◽  
pp. 156-166 ◽  
Author(s):  
Zhou Luyao ◽  
Xu Cheng ◽  
Xu Gang ◽  
Bai Pu ◽  
Yang Yongping
Keyword(s):  
Economic Evaluation ◽  
Power Plants ◽  
Exergy Analysis ◽  
Steam Superheat

Techno-economic Evaluation of Utility-Scale Power Plants Based on the Indirect sCO2 Brayton Cycle - Report

2017 ◽  
Author(s):  
Charles W. White ◽  
Walter Shelton ◽  
Nathan Weiland ◽  
Travis Shultz ◽  
John Plunkett ◽  
...  
Keyword(s):  
Economic Evaluation ◽  
Power Plants ◽  
Brayton Cycle ◽  
Utility Scale

Compressed Air Energy Storage System Exergy Analysis and its Combined Operation with Nuclear Power Plants

2013 ◽  
Vol 448-453 ◽  
pp. 2786-2789 ◽  
Author(s):  
Jin Li ◽  
Chu Fu Li ◽  
Yan Xia Zhang ◽  
Hui Guo Yue
Keyword(s):  
Energy Storage ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Exergy Analysis ◽  
Compressed Air ◽  
Air Cooling ◽  
Compressed Air Energy Storage ◽  
Tracking Mode ◽  
Combined Operation

Nuclear plants are facing more and more peaking pressure, and combined operation with compressed air energy storage (CAES) systems is an effective approach to improve its peaking capacity. This work first simulates and conducts the exergy analysis for the CAES system. The results show that exergy efficiency of the CAES system is about 51.7%, as well as the exergy loss are primary in the fuel combustion and compressed air cooling processes, accounted for 25.4% and 11.3% of total exergy, respectively. Subsequently, three combined operation modes between CAES system and nuclear power plants for power grid peaking are investigated, which shows that three section tracking mode and incomplete tracking mode can achieve the balance between peaking effects and peaking cost.

scholarly journals Techno-economic evaluation of biomass fired or co-fired power plants with post combustion CO2 capture

2011 ◽  
Vol 4 ◽  
pp. 1851-1860 ◽  
Author(s):  
Rosa Domenichini ◽  
Franco Gasparini ◽  
Paolo Cotone ◽  
Stanley Santos
Keyword(s):  
Economic Evaluation ◽  
Co2 Capture ◽  
Power Plants

On the exergy analysis of power plants

2001 ◽  
Vol 42 (18) ◽  
pp. 2053-2059 ◽  
Author(s):  
G.P. Verkhivker ◽  
B.V. Kosoy
Keyword(s):  
Power Plants ◽  
Exergy Analysis

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 Exergy analysis of the Szewalski cycle with a waste heat recovery system

2015 ◽  
Vol 36 (3) ◽  
pp. 25-48 ◽  
Author(s):  
Tomasz Kowalczyk ◽  
Paweł Ziółkowski ◽  
Janusz Badur
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Power Plants ◽  
Exergy Analysis ◽  
Waste Heat ◽  
Reference Conditions ◽  
Heat Rate ◽  
Working Fluid ◽  
Regeneration System ◽  
Waste Heat Recovery System

Abstract The conversion of a waste heat energy to electricity is now becoming one of the key points to improve the energy efficiency in a process engineering. However, large losses of a low-temperature thermal energy are also present in power engineering. One of such sources of waste heat in power plants are exhaust gases at the outlet of boilers. Through usage of a waste heat regeneration system it is possible to attain a heat rate of approximately 200 MWth, under about 90 °C, for a supercritical power block of 900 MWel fuelled by a lignite. In the article, we propose to use the waste heat to improve thermal efficiency of the Szewalski binary vapour cycle. The Szewalski binary vapour cycle provides steam as the working fluid in a high temperature part of the cycle, while another fluid – organic working fluid – as the working substance substituting conventional steam over the temperature range represented by the low pressure steam expansion. In order to define in detail the efficiency of energy conversion at various stages of the proposed cycle the exergy analysis was performed. The steam cycle for reference conditions, the Szewalski binary vapour cycle as well as the Szewalski hierarchic vapour cycle cooperating with a system of waste heat recovery have been comprised.

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