Paper ID: 1366

Impact of Multi-Walled Carbon Nano Tubes in Diesel Engine Combustion with Hydrogen as Supplementary Fuel

 

Konkala Balashowry¹, Putha Prasad Kumar², M.S. Srinivasa Rao³, Hazari Naresh⁴ N. Srilatha⁵

¹Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Bachupally, Hyderabad.
²Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Bachupally, Hyderabad.
³Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Bachupally, Hyderabad.
⁴Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Bachupally, Hyderabad.
⁵Department of Mechanical Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Bachupally, Hyderabad

 

*Corresponding author: mechshowry@gmail.com

 

Abstract

The objective of this experiment is to investigate the effect of multiwalled carbon nanotubes, combined with hydrogen as a supplementary fuel, on the efficiency, combustion, and emissions of a diesel engine test rig. In three phases, tests were conducted. In the initial attempt, pure diesel and hydrogen at 0.047, 0.077, 0.101, and 0.121 kg per hour (F1-F5). In the second phase, diesel with 60 ppm concentration of MWCNT and hydrogen at   0.047, 0.077, 0.101, and 0.121 kg per hour(F6-F10). In the third phase, diesel with 90 ppm concentration of MWCNT and hydrogen at   0.047, 0.077, 0.101, and 0.121 kg per hour (F11-F15). It was recorded that the output thermal efficiency improved with hydrogen injection at 0.121kg per hour in all three phases, to 27.65%, 23.47%, and 25.97% compared to diesel, diesel with 60 ppm, and diesel with 90 ppm. The specific fuel consumption was reduced by 32.43%,23.52% and 25.71%, respectively. CO emissions are reduced by 37.5%, 50%, and 27.27% in three phases, and CO2 emissions are reduced by 16.66%, 35%, and 11.11%, respectively. Hydrocarbon emissions were mitigated by 40%,55% and 65% compared to baseline fuels. Smoke emissions were also reduced by 56%,70% and 76%, whereas nitric oxide emissions were increased by 38.64%, 11.03% and 28.6% among the three phases compared to baseline fuels. As cylinder peak pressure are concerned in phase 1 the pressure was increase by 29.12%, in the second phase and third phase the pressures are recorded highest value of peak pressure of 85 bar at 371 crank angle and net heat release was increased by 46.14%,16.18% and 5.2% at crank angle 363 deg, in the third phase for all the hydrogen injection rates heat release was found very high.

Keywords: Hydrogen, Particulate matter, Nitric oxide, Multiwall Carbon Nano Tubes(MWCNT), sonication.

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