Thermal power plant efficiency enhancement with Ocean Thermal Energy Conversion |
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| Affiliation: | 1. Department of Chemical, Materials and Production Engineering, Faculty of Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;2. Department of Industrial Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy;1. Department of Refrigeration and Air-Conditioning Engineering, College of Engineering, Pukyong National University, San 100, Yongdang-dong, Nam-gu, Pusan 608-739, South Korea;2. Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute, 245-7 Oho-ri, Jukwang-myeon, Goseong-gun, Gangwon-do 219-822, South Korea;1. Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, RI 02881, USA;2. Deep Ocean Water Application Research Center, Korea Institute of Ocean Science and Technology, Gangwon 245-7, South Korea;3. College of Business Administration, University of Rhode Island, RI 02881, USA;4. Department of Mechanical Engineering, University of Utah, UT 84112, USA;1. College of Engineering, Ocean University of China, 238 Songling Road, Laoshan District, Qingdao 266100, China;2. Department of Naval Architecture and Marine Engineering, University of Strathclyde, Glasgow G4 0LZ, United Kingdom;1. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, ON, Canada;2. Department of Mechanical Engineering, KFUPM, Dhahran 31261, Saudi Arabia |
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| Abstract: | In addition to greenhouse gas emissions, coastal thermal power plants would gain further opposition due to their heat rejection distressing the local ecosystem. Therefore, these plants need to enhance their thermal efficiency while reducing their environmental offense. In this study, a hybrid plant based on the principle of Ocean Thermal Energy Conversion was coupled to a 740 MW coal-fired power plant project located at latitude 28°S where the surface to deepwater temperature difference would not suffice for regular OTEC plants. This paper presents the thermodynamical model to assess the overall efficiency gained by adopting an ammonia Rankine cycle plus a desalinating unit, heated by the power plant condenser discharge and refrigerated by cold deep seawater. The simulation allowed us to optimize a system that would finally enhance the plant power output by 25–37 MW, depending on the season, without added emissions while reducing dramatically the water temperature at discharge and also desalinating up to 5.8 million tons per year. The supplemental equipment was sized and the specific emissions reduction was estimated. We believe that this approach would improve the acceptability of thermal and nuclear power plant projects regardless of the plant location. |
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| Keywords: | OTEC Thermal power plant Heat recovery Desalination |
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