Experimental study on combustion stability and performance of hydrogen-enriched compressed natural gas of a free-piston linear generator

The effect of EGR and hydrogen addition to natural gas on performance and exhaust emissions in a diesel engine by AVL fire multi-domain simulation, GPR model, and multi-objective genetic algorithm

“…Experimental evaluation [25] of hydrogen enrichment in a dual-fueled CRDI diesel engine demonstrated a decrease in CO, HC, and increase in NOx emissions by 35%, 16%, and 13% and improve in BTE and BSEC by 28% and 20%, respectively. The results of experimental study on combustion stability and performance of hydrogen-enriched compressed natural gas of a free-piston linear generator showed an improved in engine performance when l ¼ 1.4 [26].…”

Biodujomis veikiančio kibirkštinio uždegimo variklio ekologinių ir energinių rodiklių gerinimas

“…As the amount of H2 increases, the mixture's rate of heat release and flame speed increase due to the increased lower heating value of the mixture and high flame speed of hydrogen (Ismael et al, 2021). Maximum biogas flame speed with a volume ratio of CH4 to CO2 of 60/40 was recorded for the stoichiometric air-fuel ratio (Zhang and Jiang, 2018).…”

“…Iš surinktų duomenų matyti, kad, didinant vandenilio koncentraciją biodujose, visais atvejais liepsnos sklidimo greitis didėja. Didėjant vandenilio koncentracijai, didėja degimo proceso šilumos išsiskyrimo greitis ir liepsnos sklidimo greitis, dėl aukšto vandenilio žemutinio šilumingumo ir liepsnos sklidimo greičio (Ismael et al, 2021). Maksimali šilumos išsiskyrimo greičio reikšmė, kai metano ir anglies dioksido santykis 60/40, nustatyta esant stechiometriniam arba paliesintam degiajam mišiniui, kai λ = 1,1.…”