Performance analysis of CCHP system based on SOFC/MGT hybrid system with organic steam ejector refrigerator

被引：0
|
作者：
You H. [1 ]
Han J. [1 ]
Liu Y. [1 ]
机构：
[1] School of Energy and Power Engineering, Shandong University, Jinan
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2019年 / 49卷 / 05期
关键词：
Combined cooling; Heating and power (CCHP) system; Micro-gas turbine; Solid oxide fuel cell; Steam ejector; Thermodynamic analysis;
D O I：
10.3969/j.issn.1001-0505.2019.05.005
中图分类号：
学科分类号：
摘要：
To improve the overall energy efficiency of fossil energy utilized in distributed energy systems, a combined cooling, heating and power (CCHP) system based on SOFC(solid oxide fuel cell)/MGT(micro-gas turbine) integrated with an organic steam ejector refrigerator (SER) was proposed. First, a mathematical model for the CCHP system was developed and validated. Then, a parametric study was performed to observe the effects on key design parameters, such as air to fuel ratio, SOFC working pressure, SOFC inlet temperature, and mass flow rate of organic Rankine cycle (ORC) working medium on energy and exergy performances of the proposed system. The results indicate that under design conditions, the CCHP system can provide power, heating and cooling loads of 300, 32.12 and 59.34 kW, respectively. The electrical, the exergy and the overall energy efficiencies of the system are 72.01%, 61.87% and 93.97%. Through ORC/SER and heat exchanger based on the principle of "energy cascade utilization", the overall energy efficiency of the CCHP system can increase by 30.81% compared with the single SOFC/MGT hybrid power system. It is also observed that the largest exergy loss occurs in SOFC followed by after burner, regenerator and preheater 3. © 2019, Editorial Department of Journal of Southeast University. All right reserved.
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页码：840 / 850
页数：10
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