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You searched for subject:(Dual fuelling). Showing records 1 – 2 of 2 total matches.

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University of New South Wales

1. Padala, Srinivas. Ethanol port injection and dual-fuel combustion in a common-rail diesel engine.

Degree: Mechanical & Manufacturing Engineering, 2013, University of New South Wales

Opposed to a conventional approach of using ethanol in a spark-ignition engine, this study demonstrates a potential of ethanol utilization in a diesel engine using dual-fuel combustion strategy where ethanol is injected into the intake manifold and diesel is directly injected into the combustion chamber. The main focus of this study is the effect of ethanol port fuel injector (PFI) sprays on dual-fuel combustion and emissions. Firstly, details of temporal and spatial development of ethanol PFI sprays were studied using Mie-scattering and high-speed shadowgraph imaging techniques. Momentum flux-based injection rate measurement was also performed. The influences of fuel flow-rate, injection duration, and ambient air cross-flow are of particular interest in an effort to understand ethanol PFI spray characteristics that are relevant to automobile engines. Ethanol sprays are also studied for various PFI positions to examine the potential effect of droplets-airflow interaction and wall wetting. With the clear understanding on ethanol PFI sprays, dual-fuel engine experiments were conducted for various ethanol energy ratios and PFI positions. It is found that the effect of PFI position on global phenomena such as in-cylinder pressure, apparent heat release rate and mean effective pressure is much less significant than the effect of ethanol energy fraction. However, the misfiring limit shows measurable difference such that the PFI position closer to the intake valves results in 10% higher ethanol energy fraction than that of the further upstream position. Reduced wall-wetting due to surface boiling occurring on the hot valve seat is suggested as a possible cause, which is consistent with 30% lower carbon monoxide and 64% lower unburnt hydrocarbon emissions. Detailed investigation for various ethanol energy fractions was also conducted. From the in-cylinder pressure measurements, it is found that the increased ethanol energy fraction increases the engine efficiency up to 10% until it is limited by misfiring. The results are compared to diesel-only operation with varying injection timings in order to explain whether the increased efficiency is due to the combustion phasing or improved combustion associated with fast burning of ethanol. Further analysis of the data reveals that the latter is the primary cause for the efficiency gain. By advancing the diesel injection timing, it is found that the maximum ethanol fraction can be extended to 70% without the misfiring problem but 20% increase in nitrogen oxide emissions is also observed, which raises a question on the advantages of utilizing ethanol in a diesel engine. However, negligible smoke emissions are measured at ethanol energy ratio of 20% or higher suggesting that optimization of these emissions is much easier compared with conventional diesel combustion. Advisors/Committee Members: Kook, Sanghoon, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW, Hawkes, Evatt, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW.

Subjects/Keywords: Port fuel injecton; Ethanol; Dual fuelling; Diesel

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APA (6th Edition):

Padala, S. (2013). Ethanol port injection and dual-fuel combustion in a common-rail diesel engine. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/52880 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11558/SOURCE01?view=true

Chicago Manual of Style (16th Edition):

Padala, Srinivas. “Ethanol port injection and dual-fuel combustion in a common-rail diesel engine.” 2013. Doctoral Dissertation, University of New South Wales. Accessed April 17, 2021. http://handle.unsw.edu.au/1959.4/52880 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11558/SOURCE01?view=true.

MLA Handbook (7th Edition):

Padala, Srinivas. “Ethanol port injection and dual-fuel combustion in a common-rail diesel engine.” 2013. Web. 17 Apr 2021.

Vancouver:

Padala S. Ethanol port injection and dual-fuel combustion in a common-rail diesel engine. [Internet] [Doctoral dissertation]. University of New South Wales; 2013. [cited 2021 Apr 17]. Available from: http://handle.unsw.edu.au/1959.4/52880 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11558/SOURCE01?view=true.

Council of Science Editors:

Padala S. Ethanol port injection and dual-fuel combustion in a common-rail diesel engine. [Doctoral Dissertation]. University of New South Wales; 2013. Available from: http://handle.unsw.edu.au/1959.4/52880 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:11558/SOURCE01?view=true


Anna University

2. Venkata ramanan M. Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines;.

Degree: Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines, 2014, Anna University

With ongoing depletion of conventional fossil fuel reserves and associated environmental concerns there is a renewed interest in the utilization of biomass for supplementing the energy requirements Amongst different types of biomass special attention is being focused on agricultural residues known for its decentralized and perennial availability Selection of a particular biomass as a major fuel for meeting one s energy requirements are largely influenced by its availability seasonality heating value pre processing requirements competing uses and prevailing fossil fuel prices India is the largest producer processor and exporter of Cashews Over 65 of the world export of cashew kernels is accounted for by India Cashews upon processing for recovery of cashew kernels generate Cashew Nut Shell as by product The CNS formed as a protective layer of the kernel is leathery in nature and has a thickness of about 3 5 mm constituting about 65 by weight of the raw nut The calorific value of CNS is quantitatively equivalent to that of typical Indian coal These shells possess a soft honey comb structure embracing a dark reddish brown viscous liquid termed Cashew Nut Shell Liquid

References p.138-150, Appendix p.124-137

Advisors/Committee Members: Sethumadhavan R.

Subjects/Keywords: Cashew Nut Shell; Cashew shell char; Compression ignition engines; Dual fuelling; Gasification; Gasification of Cashew shell Char; Mechanical engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

M, V. r. (2014). Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/27175

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

M, Venkata ramanan. “Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines;.” 2014. Thesis, Anna University. Accessed April 17, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/27175.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

M, Venkata ramanan. “Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines;.” 2014. Web. 17 Apr 2021.

Vancouver:

M Vr. Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 17]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/27175.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

M Vr. Some studies on gasification of cashew shell char and dual fuelling of cashew shell char based producer gas in compression ignition engines;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/27175

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.