Abstract
This study evaluates the performance of a molten carbonate fuel cell and micro gas turbine (MCFC/MGT) hybrid power system bi-fueled by city gas and biogas. The performance of the MCFC/MGT hybrid power system and MFCF/MGT hybrid power system response have been investigated experimentally and numerically. Results show that the MCFC, steam reformer, and catalytic combustor models are in agreement with the experimental results of the system fueled by city gas only and the system bi-fueled by city gas and biogas. The MFCF/MGT hybrid power system can have manifest operation with the addition of biogas at a flow rate of up to 150.0 Nm3·h−1, which is about 50% of the overall input heat value. In addition, the MCFC and MGT outputs decrease with the increase in the flow rate of added biogas, with an overall power generation efficiency ranging from 39.0% to 42.0%. Furthermore, the MCFC/MGT hybrid power system can be operated stably both at low amplitude with slow current change and large amplitude with rapid power conditions. Finally, the MCFC/MGT hybrid system bi-fueled by city gas and biogas may be applicable to the energy supply of the micro–grid network.
Highlights
With the steadily increasing oil prices and strict policies for emission control, the development of new, high efficiency power generation concepts has become increasingly urgent in recent decades.The molten carbonate fuel cell (MCFC) has attracted great interest because it is a promising, clean, and efficient technology for high-efficiency and low-emission power production [1,2,3]
This study develops a MCFC/MGT hybrid system model and investigates the operating performance of a MCFC/MGT hybrid power system bi-fueled by city gas and biogas
The performance of an MCFC/MGT hybrid power system bi-fueled by city gas and biogas was evaluated in this study
Summary
With the steadily increasing oil prices and strict policies for emission control, the development of new, high efficiency power generation concepts has become increasingly urgent in recent decades. The above research shows that very little research has been conducted on the effect of the MCFC/MGT hybrid system on the energy supply in a micro–grid network, it is necessary to develop a MCFC/MGT hybrid system model and investigate the possibility of using different fuels on this hybrid system to supply energy to the power grid network. This study develops a MCFC/MGT hybrid system model and investigates the operating performance of a MCFC/MGT hybrid power system bi-fueled by city gas and biogas. The research objectives are as follows: first, to develop the MCFC, steam reformer, and catalytic combustor models; second, to evaluate the performance of a MCFC/MGT hybrid power system when bi-fueled by city gas and biogas; and third, to study the possibility of using an MCFC/MGT hybrid system fueled by bi-fueled of city gas and biogas to supply energy to the power grid network. Response analyses of the MCFC system are considered in this study for the MCFC power generation and supply system
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