Nowadays, the rising demand for energy and serious environmental pollution become the motive to improve the energy structure, saving energy and optimize energy utilization. Based on a gas turbine, a marine multistage gas turbine combined heat and power (CHP) structure is proposed. The CHP system includes the top gas turbine Brayton cycle, the intermediate water Rankine cycle (WRC) and the bottom organic Rankine cycle (ORC). According to the method of screening organic Rankine cycle refrigerant to select the appropriate organic working fluids, and their physical characteristics are described. Based on the modular modelling method, the 3-stage CHP system is established. In order to more effectively absorb low temperature waste heat, three different kinds of 3-stage CHP structures were designed to recover the heat in the exhaust gas from the heat recover steam generator (HRSG). The thermodynamic model of the combined heat and power system of marine multistage gas turbine was used to simulate the performance of three different types of 3-stage CHP structures, the optimal 3-stage CHP structure was selected by comparing and analyzing the simulation results. Based on the simulation results of the design point, it is found that the introduction of the optimal 3-stage CHP structure can increase the power output by about 8.5% and improve the cycle thermal efficiency by about 4.32% compared with a conventional 2-stage CHP cycle where only gas turbine topping cycle and water Rankine bottoming cycle are included.
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ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition
June 11–15, 2018
Oslo, Norway
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5104-3
PROCEEDINGS PAPER
Optimization Analysis of Combined Heat and Power Plant of Multistage Gas Turbine for Marine Applications
Zhitao Wang,
Zhitao Wang
Harbin Engineering University, Harbin, China
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Haoda Lei,
Haoda Lei
Harbin Engineering University, Harbin, China
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Yi-Guang Li,
Yi-Guang Li
Cranfield University, Cranfield, UK
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Shuying Li,
Shuying Li
Harbin Engineering University, Harbin, China
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Weitian Wang
Weitian Wang
Harbin Engineering University, Harbin, China
Search for other works by this author on:
Zhitao Wang
Harbin Engineering University, Harbin, China
Haoda Lei
Harbin Engineering University, Harbin, China
Yi-Guang Li
Cranfield University, Cranfield, UK
Shuying Li
Harbin Engineering University, Harbin, China
Weitian Wang
Harbin Engineering University, Harbin, China
Paper No:
GT2018-76025, V003T23A006; 14 pages
Published Online:
August 30, 2018
Citation
Wang, Z, Lei, H, Li, Y, Li, S, & Wang, W. "Optimization Analysis of Combined Heat and Power Plant of Multistage Gas Turbine for Marine Applications." Proceedings of the ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. Volume 3: Coal, Biomass, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems. Oslo, Norway. June 11–15, 2018. V003T23A006. ASME. https://doi.org/10.1115/GT2018-76025
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