SOFC-based micro-CHP system as an example of efficient power generation unit

Kupecki, Jakub; Badyda, Krzysztof

doi:10.2478/v10173-011-0011-7

Cited by 27 publications

(21 citation statements)

References 7 publications

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“…10 Figure 5 shows a comparison of results obtained as described above against the real load of the same period.…”

Section: Enginementioning

confidence: 96%

“…In [3] sources that can operate as a distributed source were classified: (i) Reciprocating engines; (ii) Gas turbines [4]; (iii) Stirling engines [5]; (iv) Combination systems based on gas turbines [6] and reciprocating engines; (v) Small hydro, wind power; (vi) Photovoltaic systems [7]; geothermal power plants [8]; (vii) Fuel cells [9,10]; and (viii) Systems using: biomass [11−13] and waste, tides, currents, waves and warm seas.…”

Section: Introductionmentioning

confidence: 99%

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Optimal control strategy of NG piston engine as a DG unit obtained by an utilization of Artificial Neural Network

Milewski

Szabłowski

Kuta

2012

2012 Power Engineering and Automation Conference

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The paper presents a control strategy concept of a piston engine fueled by Natural Gas as a DG unit obtained by using an Artificial Neural Network. The control strategy is based on several factors and directs the operation of the unit in the context of changes occurring in the market, while taking into account the operating characteristics of the unit. The control strategy is defined by an objective function: for example, work at maximum profit, maximum service life, etc. The results of simulations of the piston engine as a DG unit at chosen loads are presented. Daily changes in the prices of fuel and electricity are factored into the simulations.

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“…10 Figure 5 shows a comparison of results obtained as described above against the real load of the same period.…”

Section: Enginementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Optimal control strategy of NG piston engine as a DG unit obtained by an utilization of Artificial Neural Network

Milewski

Szabłowski

Kuta

2012

2012 Power Engineering and Automation Conference

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“…1). Main features of the micro-CHP system with solid oxide fuel cells were discussed in detail in previous paper [14]. All of these components exhibit different character-istics, strongly influencing electrical and overall efficiencies of a micro-CHP system under variable operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Mathematical model of a plate fin heat exchanger operating under solid oxide fuel cell working conditions

Kupecki¹,

Badyda²

2013

Archives of Thermodynamics

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Heat exchangers of different types find application in power systems based on solid oxide fuel cells (SOFC). Compact plate fin heat exchangers are typically found to perfectly fit systems with power output under 5 kW el . Micro-combined heat and power (micro-CHP) units with solid oxide fuel cells can exhibit high electrical and overall efficiencies, exceeding 85%, respectively. These values can be achieved only when high thermal integration of a system is assured. Selection and sizing of heat exchangers play a crucial role and should be done with caution. Moreover, performance of heat exchangers under variable operating conditions can strongly influence efficiency of the complete system. For that reason, it becomes important to develop high fidelity mathematical models allowing evaluation of heat exchangers under modified operating conditions, in high temperature regimes. Prediction of pressure and temperatures drops at the exit of cold and hot sides are important for system-level studies. Paper presents dedicated mathematical model used for evaluation of a plate fin heat exchanger, operating as a part of micro-CHP unit with solid oxide fuel cells.

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“…This characteristic is very important because since it is oxygen that comes to the anode side, a wide range of fuels can be utilized. A high operating temperature also enables further cascade use of thermal energy for its mechanical or thermal recuperation; the hybrid integration of the SOFCs with thermal cycles and/or the use of the SOFCs for the combined heat and power (CHP) generation regarding the electrochemical mechanism that the SOFCs possess [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The effect of applied control strategy on the current-voltage correlation of a solid oxide fuel cell stack during dynamic operation

Szmyd¹,

Komatsu²,

Brus³

et al. 2014

Archives of Thermodynamics

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This paper discusses the transient characteristics of the planar type SOFC cell stack, of which the standard output is 300 W. The transient response of the voltage to the manipulation of an electric current was investigated. The effects of the response and of the operating condition determined by the operating temperature of the stack were studied by mapping a current-voltage (I-V) correlation. The current-based fuel control (CBFC) was adopted for keeping the fuel utilization factor at constant while the value of the electric current was ramped at the constant rate. The present experimental study shows that the transient characteristics of the cell voltage are determined by primarily the operating temperature caused by the manipulation of the current. Particularly, the slope of the I-V curve and the overshoot found on the voltage was remarkably influenced by the operating temperature. The different values of the fuel utilization factor influence the height of the settled voltages. The CBFC has significance in determining the slope of the I-V characteristic, but the different values of the fuel utilization factor does not affect the slope as the operating temperature does. The CBFC essentially does not alter the amplitude of the overshoot on the voltage response, since this is dominated by the operating temperature and its change is caused by manipulating the current.

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SOFC-based micro-CHP system as an example of efficient power generation unit

Cited by 27 publications

References 7 publications

Optimal control strategy of NG piston engine as a DG unit obtained by an utilization of Artificial Neural Network

Optimal control strategy of NG piston engine as a DG unit obtained by an utilization of Artificial Neural Network

Mathematical model of a plate fin heat exchanger operating under solid oxide fuel cell working conditions

The effect of applied control strategy on the current-voltage correlation of a solid oxide fuel cell stack during dynamic operation

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