Effects of on-board HHO and water injection in a diesel generator

Cameron, Rick (2012) Effects of on-board HHO and water injection in a diesel generator. [USQ Project]

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HHO otherwise known as hydroxy or Browns Gas is the gas produced from splitting water into hydrogen and oxygen from electrolysis and allowing the gas to stay in a premixed state for use on-demand without the need for storage. In 1918 Charles Frazer, a North American inventor, patented the first water electrolysis machine act as a hydrogen booster for internal combustion engines. Yull Brown, a Bulgarian born Australian inventor patented and attempted to popularize Browns Gas as a cutting gas and fuel additive during the 1970’s and 80’s. During the 2000’s there was a huge influx in Browns Gas devices coming to the mark, with many sensational claims of bringing dramatic reductions in fuel consumption and exhaust emissions in internal combustion engines.

This research project involved experimentally validating the effects of on-board HHO addition on fuel economy and emissions in a 28kW diesel generator. The diesel generator was run at 30% and 55% of the engines rated power output with three rates of HHO injection, with and without water injection.

Results include accurate measurement and analysis of diesel consumption and exhaust emissions of the diesel generator under 16 combinations of generator loading, HHO injection and water injection. The HHO and water are injected into the air intake manifold of the engine. Error margins and calibrations are detailed, and environmental conditions accounted for in the findings.

HHO was shown to increase diesel consumption under all conditions tested, proportional to the rate of injection – up to a 5.2% increase at 55% load with 6L/min of HHO addition. Oxides of nitrogen (NOx) emissions were reduced up to 11.8% with the addition of water and HHO from an externally powered electrolyser. Even if the efficiency of the HHO system could be raised to 100%, the thermal losses in the engine stage would still outweigh the economy gains from on-board HHO addition.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering (Up to 30 Jun 2013)
Supervisors: Bowtell, Les
Date Deposited: 27 Feb 2013 01:44
Last Modified: 27 Feb 2013 01:44
Uncontrolled Keywords: water injection; diesel generator; browns gas
Fields of Research (2008): 09 Engineering > 0906 Electrical and Electronic Engineering > 090607 Power and Energy Systems Engineering (excl. Renewable Power)
Fields of Research (2020): 40 ENGINEERING > 4008 Electrical engineering > 400805 Electrical energy transmission, networks and systems
URI: https://sear.unisq.edu.au/id/eprint/23108

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