Development of an integrated membrane condenser system with LNG cold energy for water recovery from humid flue gases in power plants |
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| Affiliation: | 1. Department of Mechanical Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia;2. Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia;3. Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia;4. Institute on Membrane Technology (CNR-ITM), via P. Bucci 17/C, 87036 Rende (CS) Italy;5. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China;1. College of Ecology, Taiyuan University of Technology, Taiyuan 030024, China;2. School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China;3. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China;4. College of Physics, Taiyuan University of Technology, Taiyuan 030024, China;1. Energy Storage Research Group, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia;2. Department of Electrical and Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kem Sungai Besi, Kuala Lumpur, Malaysia;1. Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding 071003, Hebei, China;2. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Baoding 071003, Hebei, China;1. Center for Computational Science & e-Systems, Japan Atomic Energy Agency, 2-4, Shirakata, Tokai-mura, Naka-gun, 319-1195, Ibaraki, Japan;2. Graduate School of Science and Technology, Sophia University, 7-1, Kioi-cho, Chiyoda-ku, 102-8554, Tokyo, Japan;3. Nissan Motor Co., Ltd, 560-2, Okatsukoku, Atsugi, 243-0192, Kanagawa, Japan;4. Nippon Steel Corporation, 20-1, Shintomi, Futtsu, 293-8511, Chiba, Japan;5. Faculty of Science and Technology, Sophia University, 7-1, Kioi-cho, Chiyoda-ku, 102-8554, Tokyo, Japan;1. Department of Mechanical Engineering, University of Kashan, P. O. Box: 8731753153, Kashan, Iran;2. Department of Mechanical Engineering, Tafresh University, Tafresh, 39518-79611, Iran |
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| Abstract: | This paper investigates a detailed thermodynamic analysis of a modular-type membrane condenser system where a cooler or condenser is connected in series upstream of the membrane condenser module. A coolant circulates inside the cooler/condenser to cool down the industrial flue gas up to saturation conditions. The analysis covers water recovery rate and energy requirement for different combinations of flue gas humidity, flow rate, and temperature. Additionally, a case study is included which considers a practical industrial exhaust flue gas where the constituents of the flue gas with volumetric ratio and the feed parameters are referred from the literature. The case study investigated the utilization of cold energy obtained by LNG regasification facility as a cooling power source for the water vapor recovery process. A detailed heat transfer analysis based on the heat exchanger model is performed to determine the required mass flow rate of cooling water and natural gas. It is concluded that, the water self-sufficiency of a power plant can be achieved if the mass flow rate of the ?50 °C natural gas which is entering the membrane condenser is kept around 0.3 kg s?1 for every 1 kg s?1 flow rate of the 168 °C flue gas. |
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| Keywords: | Membrane condenser Thermodynamic analysis Liquefied natural gas (LNG) LNG regasification Cold energy |
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