Thermo-environ study of a concentrated photovoltaic thermal system integrated with Kalina cycle for multigeneration and hydrogen production |
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| Affiliation: | 1. University of Electronic Science and Technology of China, School of Mechanical and Electrical Engineering, Electronics Science and Technology Department, Chengdu, 611731, China;2. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, China;3. Cyprus International University, Faculty of Engineering, Energy Systems Engineering Department, Haspolat-Lefkosa, Mersin 10, 99010, Turkey;4. Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Education City, Doha, Qatar;5. Department of Engineering Sciences, National University of Sciences and Technology, Karachi, Pakistan;1. Group of Energy Materials, École Polytechnique Fédérale de Lausanne, Sion 1951, Switzerland;2. School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran;1. MAPNA Turbine Engineering & Manufacturing Co. (TUGA), Karaj, Iran;2. Department of Mechatronic Karaj Branch, Islamic Azad University, Tehran, Iran;1. Cyprus International University, Faculty of Engineering, Department of Energy Systems Engineering, Nicosia, North Cyprus Via Mersin 10, Turkey;2. Shaheed Zulfikar Ali Bhutto Institute of Science and Technology, Clifton Campus, Karachi, Sindh, Pakistan;3. Eastern Mediterranean University, Faculty of Engineering, Department of Mechanical Engineering, Famagusta, North Cyprus Via Mersin 10, Turkey |
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| Abstract: | Unlike steam and gas cycles, the Kalina cycle system can utilize low-grade heat to produce electricity with water-ammonia solution and other mixed working fluids with similar thermal properties. Concentrated photovoltaic thermal systems have proven to be a technology that can be used to maximize solar energy conversion and utilization. In this study, the integration of Kalina cycle with a concentrated photovoltaic thermal system for multigeneration and hydrogen production is investigated. The purpose of this research is to develop a system that can generate more electricity from a solar photovoltaic thermal/Kalina system hybridization while multigeneration and producing hydrogen. With this aim, two different system configurations are modeled and presented in this study to compare the performance of a concentrated photovoltaic thermal integrated multigeneration system with and without a Kalina system. The modeled systems will generate hot water, hydrogen, hot air, electricity, and cooling effect with photovoltaic cells, a Kalina cycle, a hot water tank, a proton exchange membrane electrolyzer, a single effect absorption system, and a hot air tank. The environmental benefit of two multigeneration systems modeled in terms of carbon emission reduction and fossil fuel savings is also studied. The energy and exergy efficiencies of the heliostat used in concentrating solar radiation onto the photovoltaic thermal system are 90% and 89.5% respectively, while the hydrogen production from the two multigeneration system configurations is 10.6 L/s. The concentrated photovoltaic thermal system has a 74% energy efficiency and 45.75% exergy efficiency, while the hot air production chamber has an 85% and 62.3% energy and exergy efficiencies, respectively. Results from this study showed that the overall energy efficiency of the multigeneration system increases from 68.73% to 70.08% with the integration of the Kalina system. Also, an additional 417 kW of electricity is produced with the integration of the Kalina system and this justifies the importance of the configuration. The production of hot air at the condensing stage of the photovoltaic thermal/Kalina hybrid system is integral to the overall performance of the system. |
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| Keywords: | Concentrated photovoltaic thermal (CPVT) Energy Exergy Hydrogen production Kalina cycle system (KCS 11) |
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