The ejectors used for the fuel cell recirculation are more reliable and low cost in maintenance than high-temperature blowers. In this paper, an anode and cathode recirculation scheme, equipped with ejectors, was designed in a solid oxide fuel cell-gas turbine (SOFC-GT) hybrid system. The ejector model, SOFC model, and other component models and the validation were conducted to investigate the performance of the hybrid system with anode and cathode ejectors. The geometric parameters of the ejectors were designed to perform the anode and cathode recirculation loops according to the design conditions of the hybrid system with a blower-based recirculation loop. The cathode ejector geometries are much larger than the anode ejector. In addition, the sensitivity analysis of the primary fluid for the standalone anode and cathode ejectors is investigated. The results show that the ejector can recirculate more secondary fluid by reducing the ejector outlet pressure. Then, the anode and cathode ejectors were integrated into the SOFC-GT hybrid system. A blower gets involved downstream, and the compressor is necessary to avoid high expensive cost of redesigning compressor. The off-design and dynamic performance were characterized after integrating the anode and cathode ejectors into the hybrid system. The dynamic and off-design performances show that the designed ejectors are effectively integrated into the anode and cathode recirculation loops to replace the blower-based recirculation loops. The safety range of relative fuel flow rate is 0.62–1.22 in the fixed rotational speed strategy, and it is 0.53–1.1 in the variable rotational speed strategy. The variable rotational speed strategy can ensure higher system efficiency, which is more than 61% at a part-load condition.
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November 2019
Research-Article
Performance Evaluation of an SOFC-GT Hybrid System With Ejectors for the Anode and Cathode Recirculations Available to Purchase
Jinwei Chen,
Jinwei Chen
1
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
1Corresponding authors.
Search for other works by this author on:
Kuanying Gao,
Kuanying Gao
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
Search for other works by this author on:
Maozong Liang,
Maozong Liang
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
Search for other works by this author on:
Huisheng Zhang
Huisheng Zhang
1
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
1Corresponding authors.
Search for other works by this author on:
Jinwei Chen
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
Kuanying Gao
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
Maozong Liang
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
Huisheng Zhang
Gas Turbine Research Institute,
Shanghai 200240,
e-mail: [email protected]
Shanghai Jiao Tong University
,Shanghai 200240,
China
e-mail: [email protected]
1Corresponding authors.
Manuscript received March 5, 2018; final manuscript received February 12, 2019; published online March 25, 2019. Editor: Wilson K. S. Chiu.
J. Electrochem. En. Conv. Stor. Nov 2019, 16(4): 041004 (11 pages)
Published Online: March 25, 2019
Article history
Received:
March 5, 2018
Revision Received:
February 12, 2019
Accepted:
February 20, 2019
Citation
Chen, J., Gao, K., Liang, M., and Zhang, H. (March 25, 2019). "Performance Evaluation of an SOFC-GT Hybrid System With Ejectors for the Anode and Cathode Recirculations." ASME. J. Electrochem. En. Conv. Stor. November 2019; 16(4): 041004. https://doi.org/10.1115/1.4042985
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