Thermodynamic performance comparison of SOFC-MGT-CCHP systems coupled with two different solar methane steam reforming processes |
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| Affiliation: | 1. Faculty of Polymer Science, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran;2. Department of Mechanical Engineering and Materials, Universidad de Seville, P.O. Box 159163-4311, Seville, Spain;1. Functional Materials and Components R&D Group, Korea Institute of Industrial Technology, Gangneung 25440, Republic of Korea;2. Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea;3. Research & Development Team, Korea Zinc Company, Ulsan 44997, Republic of Korea;4. Department of Chemistry – Ångström Laboratory, Uppsala University, Box 538, 751 21 Uppsala, Sweden;1. Federal State Institution «Federal Research Centre «Fundamentals of Biotechnology» of the Russian Academy of Sciences» Leninsky Prospect, 33, Building 2, 119071, Moscow, Russian Federation;2. Federal Government Budgetary Institution of Science. “Federal Scientific Agroengeneering Centre VIM”, 1st Institutskiy Proezd, Building 5, 109428, Moscow, Russian Federation;3. Russian University of Transport, 127994, St. Obraztsova, 9, Bldg. 9, Moscow, Russia;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China |
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| Abstract: | Multi-energy complementary distributed energy system integrated with renewable energy is at the forefront of energy sustainable development and is an important way to achieve energy conservation and emission reduction. A comparative analysis of solid oxide fuel cell (SOFC)-micro gas turbine (MGT)-combined cooling, heating and power (CCHP) systems coupled with two solar methane steam reforming processes is presented in terms of energy, exergy, environmental and economic performances in this paper. The first is to couple with the traditional solar methane steam reforming process. Then the produced hydrogen-rich syngas is directly sent into the SOFC anode to produce electricity. The second is to couple with the medium-temperature solar methane membrane separation and reforming process. The produced pure hydrogen enters the SOFC anode to generate electricity, and the remaining small amount of fuel gas enters the afterburner to increase the exhaust gas enthalpy. Both systems transfer the low-grade solar energy to high-grade hydrogen, and then orderly release energy in the systems. The research results show that the solar thermochemical efficiency, energy efficiency and exergy efficiency of the second system reach 52.20%, 77.97% and 57.29%, respectively, 19.05%, 7.51% and 3.63% higher than those of the first system, respectively. Exergy analysis results indicate that both the solar heat collection process and the SOFC electrochemical process have larger exergy destruction. The levelized cost of products of the first system is about 0.0735$/h that is lower than that of the second system. And these two new systems have less environmental impact, with specific CO2 emissions of 236.98 g/kWh and 249.89 g/kWh, respectively. |
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| Keywords: | Solar energy Hydrogen Methane reforming Solid oxide fuel cell Performance comparison |
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