TY  - JOUR
N1  - cited By 16
TI  - Optimisation of operating parameters on the performance characteristics of a free piston engine linear generator fuelled by CNGâ??H2 blends using the response surface methodology (RSM)
SP  - 1996
AV  - none
EP  - 2016
SN  - 03603199
PB  - Elsevier Ltd
N2  - The free piston engine linear generator (FPELG) is a simple engine structure with few components, making it a promising power generation system. However, because the engine works without a crankshaft, the handling of the piston motion control (PMC) is the main challenge influencing the stability and performance of FPELGs. In this article, the optimal operating parameters of FPELG for maximising engine performance and reducing exhaust gas emissions were studied. Moreover, the influence of adding hydrogen (H2) to compressed natural gas (CNG) fuel on FPELG performance was investigated. The influence of operating parameters on in-cylinder pressure was also analysed. The single-piston FPELG fuelled by CNG blended with H2 was used to run the experiments. The response surface methodology (RSM), including the central composite design (CCD), was used. Then, adequacy models were developed and verified by ANOVA. Three independent factors on seven responses were utilised for optimisation. Results showed that the optimal operating conditions of lambda, ignition velocity, and injection position were 0.96, 0.53 m/s, and â??14.9 mm, respectively. The best-predicted values were as follows: indicated mean effective pressure (IMEP) of 7.6 bar, in-cylinder pressure of 27.87 bar, combustion efficiency of 39.64, CO of 9531.41 ppm, CO2 of 2.4, HC of 551.75 ppm, and NOX of 113.737 ppm. Furthermore, results showed that the experimental data could be fitted well with the predicted quadratic model. © 2021 Hydrogen Energy Publications LLC
IS  - 3
KW  - Compressed natural gas; Crankshafts; Electric generators; Engine pistons; Free piston engines; Surface properties
KW  -  Engine performance; Free-piston engine; In-cylinder pressures; Linear free piston engine; Linear generators; Operating parameters; Optimisations; Performance; Performance characteristics; Response-surface methodology
KW  -  Gas emissions
ID  - scholars17178
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85119437420&doi=10.1016%2fj.ijhydene.2021.10.125&partnerID=40&md5=c2cdb0213333d66f8dbdf2fbf19c3b64
JF  - International Journal of Hydrogen Energy
A1  - Raheem, A.T.
A1  - Aziz, A.R.A.
A1  - Zulkifli, S.A.
A1  - Baharom, M.B.
A1  - Rahem, A.T.
A1  - Ayandotun, W.B.
VL  - 47
Y1  - 2022///
ER  -