Scenario analysis of a bioethanol fueled hybrid power generation system

Sustainable Chemical Processes

Po Chih Kuo²  Yuan-Tai Hsu¹  Wei Wu² 

[1]National Yunlin University of Science and Technology, Douliou, Yunlin 64002, Taiwan

[2]Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan

关键词: Energy efficiency;    Ethanol-fueled fuel cell system;    Scenario analysis;    Hybrid power system;   

Others  :  789163
DOI  :  10.1186/2043-7129-2-5

 received in 2013-11-27, accepted in 2014-02-14,  发布年份 2014

【 摘 要 】

Background

Regarding most of FC/PV/Battery based hybrid power generation systems, the photovoltaic (PV) power usually dominates the main power supply and the water electrolyzer is used to produce hydrogen. The energy efficiencies of these hybrid power generation (HPG) systems are usually low due to the low conversion efficiency of PV cell and the extra power consumption to hydrogen production. To reduce the electricity demand by the PV system and improve the energy efficiency of hydrogen production unit, a scenario-based design of the HPG system is necessary.

Result

This paper proposes an EFC/PV/Battery based hybrid power generation system to meet 24-hour power demand. An ethanol-fueled fuel cell (EFC) power generator not only dominates the main power supply, but also a combination of the stand-alone EtOH-to-H2 processor and PEMFC can ensure higher energy efficiency. A PV system is treated as an auxiliary power generator which can reduce the (bio)ethanol consumption. A backup battery not only stores excess power from PV or EFC, but also it can precisely satisfy the power demand gap. Finally, scenario analysis of the hybrid power generation (HPG) system in regard to the hybrid power dispatch and energy efficiency is addressed.

Conclusion

An optimized fuel processing unit using ethanol fuel can produce high-purity hydrogen. The simulation shows that the stand-alone EtOH-to-H2 processor not only guarantee the high energy efficiency, but also it can continuously produce hydrogen if the fuel is enough. According to scenarios for the daily operation of the HPG system, the EFC power dominates the power supply during the night, the PV system dominates the power supply during the day and the backup battery aims to instantly compensate the power gap and store the excess power from PV or EFC. According to the hybrid power dispatch, the distribution of the HPG system efficiency is specified.

【 授权许可】

   
2014 Wu et al.; licensee Chemistry Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

Figure 3.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

【 参考文献 】

• [1]Muselli M, Notton G, Louche A: Design of hybrid-photovoltaic power generator, with optimization of energy management. Sol Energy 1999, 65:143-157.
• [2]Elhadidy MA: Performance evaluation of hybrid (wind/solar/diesel) power systems. Renew Energy 2002, 26:401-413.
• [3]Hwang JJ, Lai LK, Wu W, Chang WE: Dynamic modeling of a photovoltaic hydrogen fuel cell hybrid system. Int J Hydrogen Energy 2009, 34:9531-9542.
• [4]Uzunoglu M, Onar OC, Alam MS: Modeling, control and simulation of a PV/FC/UC based hybrid power generation system for stand-alone applications. Renew Energy 2009, 34:509-520.
• [5]Zervas PL, Sarimveis H, Palyvos JA, Markatos NCG: Model-based optimal control of a hybrid power generation system consisting of photovoltaic arrays and fuel cells. J Power Sources 2008, 181:327-338.
• [6]Yilanci A, Dincer I, Ozturk HK: A review on solar-hydrogen/fuel cell hybrid energy systems for stationary applications. Prog Energy Combust Sci 2009, 35:231-244.
• [7]Gupta RB: Hydrogen Fuel: Production, Transport, and Storage. USA: CPC press; 2009.
• [8]Shekhawat D, Spivey JJ, Berry DA: Fuel Cells: Technologies for Fuel Processing. UK: Elsevier; 2007.
• [9]Wu W, Tungpanututh C, Yang HT: A conceptual design of a stand-alone hydrogen production system with low carbon dioxide emissions. Int J Hydrogen Energy 2012, 37:10145-10155.
• [10]Garcia VM, Lopez E, Serra M, Llorca J: Dynamic modeling of a three-stage low-temperature ethanol reformer for fuel cell application. J Power Sources 2009, 192:208-215.
• [11]Degliuomini LN, Biset S, Luppi P, Basualdo MS: A rigorous computational model for hydrogen production from bio-ethanol to feed a fuel cell stack. Int J Hydrogen Energy 2012, 37:3108-3129.
• [12]Uriza I, Arzamendi G, Lopez E, Llorca J, Gandia LM: Computational fluid dynamics simulation of ethanol steam reforming in catalytic wall microchannel. Chem Eng J 2011, 167:603-609.
• [13]Choi Y, Stenger HG: Water gas shift reaction kinetics and reactor modeling for fuel cell grade hydrogen. J Power Sources 2003, 124:432-439.
• [14]Khan MJ, Iqbal MT: Analysis of a small wind-hydrogen stand-alone hybrid energy system. Appl Energy 2009, 86:2429-2442.
• [15]Wu W, Xu JP, Hwang JJ: Multi-loop nonlinear predictive control scheme for a simplistic hybrid energy system. Int J Hydrogen Energy 2009, 34:3953-3964.
• [16]Knauff M, McLaughlin J, Dafis C: Simulink model of a lithium-ion battery for the hybrid power system test-bed. 2007. [ASNE Intelligent Ships Symposium, Philadelphia, PA, USA]
• [17]Erdinc O, Vural B, Uzunoglu M: A dynamic lithium-ion battery model considering the effects of temperature and capacity fading. 2009. [2nd International Conference on Clean Electrical Power, Capri, Italy]
• [18]Nelson J: The Physics of Solar Cell. UK: Imperial College Press; 2003.
• [19]Deluga GA, Salge JR, Schmidt LD, Verykios XE: Renewable hydrogen from ethanol by autothermal reforming. Science 2004, 303:933-937.
• [20]Hung CC, Chen SL, Liao YK, Chen CH, Wang JH: Oxidative steam reforming of ethanol for hydrogen production on M/Al2O3. Int J Hydrogen Energy 2012, 37:4955-4966.
• [21]Shen J, Tang Y, Liang Y, Tan X: Relationship between initial efficiency and structure parameters of carbon anode material for Li-ion battery. J Cent South Univ Technol 2008, 15:484-487.
• [22]Ma D, Ki WH, Tsui CY, Mok PKT: A single inductor dual-output integrated dc/dc boost converter for variable voltage scheduling. 2001. [Proceeding of the ASP-DAC, Asia and South Pacific]
• [23]Anis RA: Stepped sine wave DC/AC inverter I. Theoretical analysis. Energy Mater Sol Cells 1992, 28:123-130.