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Research Papers: Alternative Energy Sources

Exergy Analysis of Photovoltaic Panels-Coupled Solid Oxide Fuel Cell and Gas Turbine-Electrolyzer Hybrid System

[+] Author and Article Information
Saber Sadeghi

Department of Mechanical Engineering,
Shahid Bahonar University,
Kerman, Iran
Energy and Environmental
Engineering Research Center,
Shahid Bahonar University,
Kerman, Iran

Mehran Ameri

Department of Mechanical Engineering,
Faculty of Engineering,
Shahid Bahonar University,
Kerman, Iran
Energy and Environmental
Engineering Research Center,
Shahid Bahonar University,
Kerman, Iran
e-mail: ameri_mm@uk.ac.ir

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received June 25, 2013; final manuscript received December 15, 2013; published online March 4, 2014. Assoc. Editor: Srinivas Katipamula.

J. Energy Resour. Technol 136(3), 031201 (Mar 04, 2014) (10 pages) Paper No: JERT-13-1195; doi: 10.1115/1.4026313 History: Received June 25, 2013; Revised December 15, 2013

Exergy losses represent true losses of potential to generate a desired product, exergy efficiencies always provide a measure of approach to ideality, and the links between exergy and both economics and environmental impact can help develop improvements. In this study, PV-coupled Solid Oxide Fuel Cell (SOFC) and Gas Turbine (GT)-electrolyzer hybrid power generation system is considered to determine the contribution of different hybrid system components in the total exergy loss. The number of panels, the power of SOFC–GT, and the power of electrolyzer can have different values. Therefore, to obtain the optimum combination from ecological, economical, and reliability points of view, a multi-objective optimization algorithm (PESA) is considered. This optimization method chooses a set of optimum solutions that is known as Pareto frontier. The exergy loss of some of these optimum solutions is compared with each other. The effect of panel angle and SOFC–GT fuel type on the hybrid system exergy loss is considered in this study. Also, the hybrid system exergy loss is determined in different months of the year to obtain the worst month from exergy loss view.

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Figures

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Fig.1

The hybrid power generation system

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Fig. 2

The load demand for four different days of the year for 500 households

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Fig. 3

Radiation in Kerman for four different days of the year

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Fig. 4

Temperature variation in Kerman for four different days of the year

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Fig. 5

Pareto frontier of hybrid system for methane as SOFC–GT fuel

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Fig. 6

Exegy loss of three optimum combinations on 17 January, SOFC–GT fuel: methane, tilt angle of panels is 30 deg

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Fig. 7

Inlet exergy, outlet power, and exergy loss of 2000 PV panels on 17 January, SOFC–GT fuel: methane, tilt angle of panels is 30 deg

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Fig. 8

Inlet power, outlet exergy, and exergy loss of electrolyzer on 17 January, SOFC–GT fuel: methane, tilt angle of panels is 30 deg

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Fig. 9

Inlet exergy, outlet power, and exergy loss of SOFC–GT on 17 January, SOFC–GT fuel: methane, tilt angle of panels is 30 deg

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Fig. 10

Inlet exergy, outlet exergy, stored exergy, and exergy loss of the hybrid system on 17 January, SOFC–GT fuel: methane, tilt angle of panels is 30 deg

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Fig. 11

Exergy loss of the hybrid system for four different days of the year, tilt angle of panels is 30 deg, SOFC–GT fuel: methane

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Fig. 12

Total radiation in Kerman for four different days of the year, tilt angle of panels is 30 deg

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Fig. 13

Exergy loss of the hybrid system on 17 January, SOFC–GT fuel: methane

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Fig. 14

Exergy loss of the hybrid system on 17 January for four different SOFC–GT fuels, tilt angle of panels is 30°

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