BUS-FUEL SAVINGS - Integration of Green Technologies on Existing Public Transportation Buses
About this good practice
The BUS_FUEL_SAVINGS project addressed the high fuel consumption and environmental impact of Cyprus’s public transport system, which operates 2,600 diesel-powered buses consuming 60 million litres of fuel annually. This results in high operational costs for transport companies, most of which depend on government subsidies. Diesel use also contributes to air pollution and a reduced quality of life. The project was initiated to reduce fuel costs and emissions while supporting sustainable mobility.
Through the promotion of alternative fuels such as hydrogen, the project reduced carbon emissions and greenhouse gases from public transport. It also improved energy efficiency by introducing fuel-saving technologies and launched awareness campaigns to educate stakeholders, policymakers, and the public on the benefits of alternative fuels.
The initiative began with an assessment of the bus fleet and implemented HHO gas generators to enhance combustion efficiency. These devices electrolyze water to produce a hydrogen-oxygen gas mixture, which is injected into engines to improve fuel performance.
This interdisciplinary effort supported Research, Technological Development, and Innovation in sustainable transport.
Partners: Hystore Tech Ltd, SignalGeneriX Ltd, Frederick Research Center, Energy Service, Cyprus Energy Regulatory Authority, InoMob Ltd.
Beneficiaries: Public transport operators including Cyprus Public Transport and private bus companies.
Resources needed
The total budget was €1,270,620.00. The project was co-funded by the European Regional Development Fund and the Republic of Cyprus, through the Research and Innovation Foundation under the RESTART Program.
Evidence of success
The HHO Generator System was tested on a van and a bus to assess fuel consumption and emissions before and after applying the technology. The results showed significant fuel savings and a noticeable reduction in harmful emissions across both vehicles. Overall, fuel savings ranged from 5.54% to 25.3%, and emissions were reduced by over 20%, demonstrating the effectiveness of the HHO Technology in improving fuel efficiency and environmental sustainability.
Potential for learning or transfer
The BUS-FUEL-SAVINGS project provides insights for regions looking to improve public transport efficiency and sustainability. By integrating OxyHydrogen (HHO) gas generators, it achieved significant fuel savings and emission reductions. The technology is adaptable to different bus fleet sizes, making it suitable for various transport capacities. It also costs less than replacing an entire fleet, making it a budget-friendly option for regions with limited funds. Adopting this model can enhance transport efficiency, improve air quality and support environmental goals. However, challenges include technical compatibility, as integrating HHO with different engines may require adjustments and infrastructure needs, since proper maintenance and support systems are essential for long-term success. A patent application has been submitted, and further developments remain awaited.
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