India’s First LNG Dual-Fuel DEMU Train Ready, Cuts Diesel Use by 40%

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LNG Train: Indian Railways has hit a major milestone in achieving cleaner, eco-friendly, and cost-effective rail operations. The Ahmedabad Division of Western Railway has made history by implementing a liquefied natural gas (LNG)-based dual fuel system for the first time in the nation, specifically in the Driving Power Car (DPC) of a Diesel Electric Multiple Unit (DEMU). Consequently, the first LNG-powered DEMU train in the country is now fully prepared for regular service.

As part of this important initiative, two DEMU DPCs with a capacity of 1400 HP have been upgraded to a diesel + LNG dual fuel system, which replaces about 40 percent of diesel with LNG. These modified DPCs have successfully completed over 2000 kilometers of field trials and are currently running in regular passenger service without any technical problems.

Green Railway Mission

Meanwhile, the Ahmedabad Divisional Railway Manager (DRM), Mr. Ved Prakash, visited the DEMU shed at Sabarmati to check on the preparations, safety standards, and maintenance setups related to the LNG-based system. The DRM gathered detailed insights from officials and technical staff, labeling this innovation as a “game changer” for Indian Railways and a significant advancement towards the Green Railways Mission.

Advantages of LNG Dual Fuel System

Utilizing LNG will greatly cut down engine emissions, especially carbon dioxide (CO₂), nitrogen oxides (NOx), and particulate matter (PM), thus enhancing air quality around railway tracks. LNG is also a more affordable fuel compared to diesel. Based on test data, potential savings of around Rs 11.9 lakh per year for each DPC and about Rs 23.9 lakh per year for each 8-coach DEMU rake (2 DPCs) are achievable.

2200 litre capacity

Dual-fuel engines can seamlessly switch between diesel and LNG according to fuel availability, reducing operational disruption. The dual-fuel system is designed to maintain engine power and reliability comparable to conventional diesel engines. As per the approved design, each DPC is equipped with a tank of approximately 2,200 liters (approximately 950-1,000 kg of usable LNG).

A single full fill provides enough LNG to cover approximately 222 kilometers of daily operations. According to railway sources, this technology will be expanded on a large scale after emission testing and final approvals by the RDSO. In the next phase, there are plans to convert eight more DEMU DPCs to the LNG dual fuel system, further strengthening Indian Railways’ commitment to clean energy, low carbon emissions, and cost-effective operations.

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