Amount of CO2 Discharged from Compound Micro-grid of Hydrogenation City-Gas Engine and Proton Exchange Membrane Fuel Cell.
The independent micro-grid is considered to be a technology in which maximum distributed energy is realizable. However, there are many subjects, such as the stability of the dynamic characteristics of power and development of an optimal design method. If the fuel cell system of the capacity corresponding to a load peak is installed, equipment cost will be high and energy cost will not be able to get any profile commercially. By increasing the hydrogen concentration at the time of low load, the power-generation efficiency of a city-gas-engine-generator improves, and carbon dioxide emissions decrease. So, in this paper, a micro-grid composed from a proton exchange membrane fuel cell and a hydrogenation city gas engine was investigated using numerical simulation. The system with a small load factor of NEG and with a large load factor of PEM-FC system has few CO<sub>2</sub> emissions. The system which combined base-load operation of PEM fuel cell and load fluctuation operation of hydrogenation city gas engine is the most advantageous for the comprehensive evaluation of equipment cost, power generation efficiency, and CO<sub>2</sub> emissions. When the optimal system was installed into the urban area model of 20 buildings and analyzed, power generation efficiency was 25% and CO<sub>2</sub> emissions were 1,106 kg/Day.
- Journal of Environment and Engineering
Journal of Environment and Engineering 2(2), 347-358, 2007