0
RESEARCH PAPERS

A Novel Solar-Hybrid Gas Turbine Combined Cycle With Inherent CO2 Separation Using Chemical-Looping Combustion by Solar Heat Source

[+] Author and Article Information
Hui Hong1

Mechanical School, University of Sciences and Technology of Beijing, Xueyuan Road, Beijing 100083, People’s Republic of Chinahonghui70@me.ustb.edu.cn

Hongguang Jin

 Institute of Engineering Thermophysics, Chinese Academy of Sciences, P.O. Box 2706, Beijing 100080, People’s Republic of Chinahgjin@mail.etp.ac.cn

Baiqian Liu

Mechanical School, University of Sciences and Technology of Beijing, Xueyuan Road, Beijing 100083, People’s Republic of China

1

Corresponding author.

J. Sol. Energy Eng 128(3), 275-284 (Jan 21, 2006) (10 pages) doi:10.1115/1.2212443 History: Received September 13, 2005; Revised January 21, 2006

In this paper we propose a novel CO2-recovering hybrid solar-fossil combined cycle with the integration of methane-fueled chemical-looping combustion, and investigate the system with the aid of the Energy-Utilization Diagram (EUD). Chemical-looping combustion (CLC) consists of two successive reactions: first, methane fuel is oxidized by metal oxide(NiO)as an oxygen carrier (reduction of metal oxide); and second, the reduced metal (Ni) is successively oxidized by combustion air (the oxidation of metal). The oxidation of methane with NiO requires a relative low-grade thermal energy at 300°C500°C. Then concentrated solar thermal energy at approximately 450°C550°C can be utilized to provide the process heat for this reaction. By coupling solar thermal energy with methane-fueled chemical-looping combustion, the energy level of solar thermal energy at around 450°C550°C can be upgraded to the chemical energy of solid fuel Ni for better utilization of solar energy to generate electricity. The synergistic integration of solar thermal energy and chemical-looping combustion could make the exergy efficiency and the net solar-to-electric efficiency of the solar hybrid system more than 60% and 30%, respectively, at a turbine inlet temperature (TIT) of 1200°C. At the same time, this new system has an extremely important advantage of directly suppressing the environmental impact due to lack of energy penalty for CO2 recovery. Approximately 9–15 percentage points higher efficiency can be achieved compared to the conventional natural gas-fired combined cycle with CO2 separation. The results obtained here are promising and indicate that this novel solar hybrid combined cycle offers the new possibility of CO2 mitigation using both green energy and fossil fuels. These results also provide a new approach for highly efficient use of solar thermal energy to generate electricity.

FIGURES IN THIS ARTICLE
<>
Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

(a) Simplified flow diagram for solar hybrid system with CLC; (b) t-s diagram for solar hybrid cycle with CLC.

Grahic Jump Location
Figure 2

(a) Simplified diagram for ISCC; (b) t-s diagram for ISCC.

Grahic Jump Location
Figure 3

The exergy flow diagram for solar-hybrid cycle with CLC

Grahic Jump Location
Figure 4

Direct combustion of methane in ISCC

Grahic Jump Location
Figure 5

Reaction subsystem of SCLC-CC

Grahic Jump Location
Figure 6

Heat exchanger subsystem of ISCC

Grahic Jump Location
Figure 7

Heat exchanger subsystem of SCLC-CC

Grahic Jump Location
Figure 8

Power subsystem of ISCC

Grahic Jump Location
Figure 9

Power subsystem of solar hybrid system with CLC

Grahic Jump Location
Figure 10

A comparison of energy level degradation among Ni oxidation, direct combustion of CH4, and syngas combustion

Grahic Jump Location
Figure 11

The role of the solar thermal energy temperature in the exergy efficiency and the net solar-to-electric efficiency

Grahic Jump Location
Figure 12

Efficiency gain of the new system compared to a NGCC with the variation of solar thermal energy temperature

Grahic Jump Location
Figure 13

Variation of CO2 emission and its reduction with solar thermal energy temperature

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In