Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7720863 | International Journal of Hydrogen Energy | 2014 | 15 Pages |
Abstract
In a previous study, a new hybrid system of molten carbonate fuel cell (MCFC) and homogeneous charge compression ignition (HCCI) engine was developed, where the HCCI engine replaces the catalytic burner and produces additional power by using the left-over heating values from the fuel cell stack. In the present study, to reduce the additional cost and footprint of the engine system in a hybrid configuration, the possibility of engine downsizing is investigated by using two strategies, i.e. the use of a turbocharger and the use of high geometric compression ratio for the engine design, both of which are to increase the density of the intake charge and thus the volumetric efficiency of the engine. Combining these two strategies, we suggest a new engine design with â¼60% of displacement volume of the original engine. In addition, operating strategies are developed to run the new hybrid system under part load conditions. It is successfully demonstrated that the system can operate down to 65% of the power level of the design point, while the system efficiency remains almost unchanged near 63%.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Seonyeob Kim, Ji Young Jung, Han Ho Song, Seung Jin Song, Kook Young Ahn, Sang Min Lee, Young Duk Lee, Sanggyu Kang,