Economic Assessment of Compressed Natural Gas for Diesel Vehicle in Thailand

In the present work, the economical aspects of compressed natural gas (CNG) as fuel for diesel vehicles were studied. There are 2 main technologies i.e dedicated retrofit and diesel dual fuel (DDF). Dedicated retrofit and diesel dual fuel were considered in technical and economic that composes with infrastructure and conversion investment cost. According to the economic study, the research was mainly concerned the use of compressed natural gas for diesel vehicle in Thailand by focusing on 10 wheels, 6 wheels and 4 wheels both dedicated retrofit and diesel dual fuel. The expected results explain the suitable pathway of compressed natural gas in the case of dedicated retrofit and diesel dual fuel in order to reduce the import diesel oil for Thailand. From the economic analysis based on the same diesel oil saving rate, the investment and operating costs of diesel duel fuel NGV is significantly lower than those of dedicated NGV, particularly for the 4 wheels vehicle.