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While dual fuel low temperature combustion (LTC) has been studied before, a detailed second law analysis of dual fuel LTC is not yet available in the open literature. To address this gap, a previously validated, closed-cycle, multi-zone, simulation of diesel-natural gas dual fuel LTC was used to perform a second law analysis. For the present study, a 2.4-l single-cylinder research engine operating...
Dual fuel low temperature combustion (LTC) strategies are attractive for future internal combustion engines due to their promise of very low engine-out emissions of oxides of nitrogen (NOx) and particulate matter. In the present work, experimental results for diesel-ignited methane dual fuel LTC on a compression ignition single cylinder research engine (SCRE) are presented. Methane was fumigated into...
In the present work, a comparative study of fuel–air equivalence ratio measurements in premixed atmospheric methane–air flames with ungated laser-induced breakdown spectroscopy (LIBS) and natural chemiluminescence emission spectroscopy is presented. With ungated LIBS, the strong elastically scattered laser light greatly reduces the measurement dynamic range and sensitivity. For effectively suppressing...
Recently, Teh et al. (2008) showed that constant internal energy–volume (UV) combustion (with equilibrium products) is the optimal strategy for minimizing entropy generation (S gen ) in idealized internal combustion (IC) engine processes. The present paper examines the effects of fuel type (CH 4 , C 2 H 5 OH, and C 8 H 18 ), reactant temperature (300–1200 K),...
Chemiluminescence emissions from OH ∗ , CH ∗ , C2∗, and CO2∗ formed within the reaction zone of premixed flames depend upon the fuel–air equivalence ratio in the burning mixture. In the present paper, a new partial least square regression (PLS-R) based multivariate sensing methodology is investigated and compared with an OH ∗ /CH ∗ intensity ratio-based calibration...
This paper examines the exhaust waste heat recovery potential of a high-efficiency, low-emissions dual fuel low temperature combustion engine using an Organic Rankine Cycle (ORC). Potential improvements in fuel conversion efficiency (FCE) and specific emissions (NO x and CO 2 ) with hot exhaust gas recirculation (EGR) and ORC turbocompounding were quantified over a range of injection...
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