Since the earth is called water planet and the electric power can be generated from renewable energy sources and the safety precautions are advanced, the water electrolysis process can be efficiently and affordably performed. The electrolysis process of water with a catalyst (NaOH) produces oxy-hydrogen (HHO) gas that can solve the shortage of fossil fuel and reduces environmental pollution. In this study, the HHO dry cell generator was designed, fabricated and tested experimentally to investigate its performance and optimize its parameters. The hybrid internal combustion engines using HHO is considered one of the most important studied applications in this work. The engine performance and gas emission are evaluated and analyzed for two different engines; new engine with ECU and different sensors 1300CC and old engine with carburetor 150CC. The results show HHO gas helps to solve the problems of fossil fuel depletion, environmental pollution, and global warming. The results also recorded that the consumption of the fuel is reduced by 14.8% for the 150CC engine and 16.3% for a 1300CC engine. HHO gas reduced the emission gases by 33% and 24.5% reduction in CO and 27.4% and 21% reduction in HC for 150CC and 1300CC engines respectively. A new application of HHO gas, its use in water desalination is studied. A hybrid solar still using oxy-hydrogen is investigated and its productivity of distilled water was examined. HHO gas has different domestic and industrial applications like cooking, welding, and cutting. The new HHO desalination system had daily efficiency nearly 25% and productivity 19.1l/m2/day plus its work can long-lasting for 24hours, while the conventional solar still had higher daily efficiency 42% but lower productivity 3.9 l/m2/day. HHO gas can work individually as a fuel and it can work as an enhancer secondary fuel.


HHO, engine performance, emissions, desalination, cooking, welding, cutting.


Nabil, T., Dawood, M.M.K., 2019. Enabling Efficient Use of Oxy-hydrogen Gas (HHO) in Selected Engineering Applications; Transportation and Power Generation. Int. J. Altern. Fuels. Energy., 3(2): IJAFE-2019-013.