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TECHNICAL PAPERS: Internal Combustion Engines

# Experimental Investigations on a Hydrogen-Diesel Dual Fuel Engine at Different Compression Ratios

[+] Author and Article Information
M. Masood

Mechanical Engineering Department, M. J. College of Engineering and Technology, Hyderabad-34, Indiamasoodtayyab@yahoo.com

S. N. Mehdi

Mechanical Engineering Department, M. J. College of Engineering and Technology, Hyderabad-34, Indianawazishmehdi@yahoo.co.in

P. Ram Reddy

J. Eng. Gas Turbines Power 129(2), 572-578 (Mar 19, 2006) (7 pages) doi:10.1115/1.2227418 History: Received February 03, 2005; Revised March 19, 2006

## Abstract

An experimental investigation was carried out on a computer interfaced single cylinder variable compression ratio, compression ignition engine to optimize the performance characteristics and to find the useful higher compression ratio (UHCR) with hydrogen-diesel dual fuel mode. Experimentations were conducted on five different compression ratios and the performance characteristics were calculated. The effect of blending on $NOx$, $HC$, $CO$, and particulate matter were measured and reported. The rate of heat release and speed of combustion with increase in compression ratio with simultaneous increase in hydrogen substitution were measured. Intake temperature of air was increased and for three different temperatures, the effect of increase in temperature of air-hydrogen mixture on $NOx$ were studied and found that there was a sharp increase in the $NOx$ value as the inlet temperature was increased from 65 to $85°C$.

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## Figures

Figure 1

Effect of hydrogen substitution on brake thermal efficiency

Figure 2

Effect of hydrogen substitution on HC

Figure 3

Effect of hydrogen substitution on CO

Figure 4

Effect of hydrogen substitution on NOx

Figure 5

Effect of hydrogen substitution on PM

Figure 6

Pressure-crank angle diagram at 80% hydrogen substitution

Figure 7

Heat release rate at 80% hydrogen substitution

Figure 8

Peak pressures at different compression ratios and at various % H2 substitution

Figure 9

Effect of inlet temperature on NOx at different injection angles

Figure 10

Pressure-crank angle diagram with diesel as fuel and at different compression ratios

Figure 11

% hydrogen substitution at different loads

Figure 12

Schematic representation of the experimental setup

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