How does CNG compare to traditional fuels in terms of energy density?

Compressed Natural Gas (CNG) is known to have a lower energy density compared to traditional fuels such as gasoline or diesel. Energy density refers to the amount of energy stored in a given volume or mass of fuel. In the case of CNG, it typically contains less energy per unit volume compared to liquid fuels. As a result, vehicles running on CNG require larger tanks or need to be refueled more frequently than those using traditional fuels to achieve a similar range. This characteristic is a key consideration for the design and operation of vehicles powered by CNG, which impacts fuel efficiency and range significantly in practical applications.

The context around the evaluation of CNG's energy density as lower than traditional fuels is important in understanding its feasibility, especially when assessing its use as an alternative fuel source.