Bobjengr, thanks for your clarification. I think most of our readers may have same doubt, when reading an article with respect to natural gas/CNG/LPG. I hope the response from our various members will help them to clarify it.
Hello My Design--Basically, natural gas is methane. Generally 84 to 90 % methane with a heating value ranging from 900 to 1200 Btu/Ft^ 3. LPG is classified as propane or butane. Propane has a heating value of approximately 2500 Btu/Ft^3 where as butane is 3500 Btu/Ft^3. In climates experienced in the United States, butane is not that suitable for most usage. Propane is the LPG of choice. Hope this helps.
"Natural gas is essentially methane, whereas liquefied petroleum (propane and butane) is a hydrocarbon-based gas. It is used in automobiles, but its energy density is lower than that of gasoline, so its fuel consumption is higher."
Murray, thanks for the clarification and I think you are right.
"Many vehicles could be modified to run on natural gas. I have a friend who has traveled extensively in Asia and found lots of natural gas powered vehicles there. '
Naperlou, in our country, for a particular state all the public transport vehicles are using CNG (Compressed Natural Gas) and state government insisted all private vehicles to convert the mode of fuel as CNG. Federal government also has a plan to make it compulsory from 2016.
Design collaboration now includes the entire value chain. From suppliers to customers, purchasing to outside experts, the collaborative design team includes internal and external groups. The design process now stretches across the globe in multiple software formats.
A new high-pressure injection-molding technology produces near-net shape parts with 2-inch-thick walls from high-performance materials like PEEK, PAI, and carbon-filled polymers. Parts show no voids, sinks, or porosity, have more consistent mechanical properties, and are stronger.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.