Recovery of industrial waste heat is significant to both energy saving and emission reduction. In the present paper, two types of supercritical CO2 Rankine cycles with and without internal heat exchanger (IHX) are integrated for analyzing the performance of low and medium temperature industrial heat recovery. Cycles were simulated with Aspen software, by which the influences of the initial temperature, initial pressure and temperature of cooling water were observed. The results indicate that cycle efficiency and net output work increase with growth of initial temperature, yet they fell as temperature of cooling water ramps down for the two types of cycle. For a given initial temperature, the cycle efficiency and net output work have maximum values under various initial pressures. This can be attributed to the power consumption of CO2 pump, which goes up significantly with increase of initial pressure. The performances of supercritical CO2 Rankine cycles with and without IHX utilizing four typical industrial heat sources at low and medium temperature were analyzed, which were the heat of non-concentrating solar collector, the exhaust gas heat of a 600MW coal fired plant, the exhaust gas heat of a CFB boiler and the exhaust gas heat of industrial furnace of a cement plant. The optimal cycle efficiencies range from 7% to 12% without IHX and 9% to 15% with IHX, respectively, under the temperature of heat source varying from 130°C to 200°C.
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ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology
July 14–19, 2013
Minneapolis, Minnesota, USA
Conference Sponsors:
- Advanced Energy Systems Division
- Solar Energy Division
ISBN:
978-0-7918-5551-5
PROCEEDINGS PAPER
Supercritical CO2 Rankine Cycle Using Low and Medium Temperature Heat Sources
Cong Guo,
Cong Guo
North China Electric Power University, Beijing, China
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Xiaoze Du,
Xiaoze Du
North China Electric Power University, Beijing, China
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Yingyan Zhou,
Yingyan Zhou
North China Electric Power University, Beijing, China
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Lijun Yang,
Lijun Yang
North China Electric Power University, Beijing, China
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Yongping Yang
Yongping Yang
North China Electric Power University, Beijing, China
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Cong Guo
North China Electric Power University, Beijing, China
Xiaoze Du
North China Electric Power University, Beijing, China
Yingyan Zhou
North China Electric Power University, Beijing, China
Lijun Yang
North China Electric Power University, Beijing, China
Yongping Yang
North China Electric Power University, Beijing, China
Paper No:
ES2013-18398, V001T15A010; 9 pages
Published Online:
December 22, 2013
Citation
Guo, C, Du, X, Zhou, Y, Yang, L, & Yang, Y. "Supercritical CO2 Rankine Cycle Using Low and Medium Temperature Heat Sources." Proceedings of the ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2013 7th International Conference on Energy Sustainability. Minneapolis, Minnesota, USA. July 14–19, 2013. V001T15A010. ASME. https://doi.org/10.1115/ES2013-18398
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