Quote:
Originally Posted by GH85Carrera
There are several natural gas stations in my area. How long does it take to typically take to refill at a CNG station?
I keep waiting for the conversions to come down in price some. I can see going to a dual fuel setup. CNG for around town and good old gasoline for road trips.
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That works if CNG is priced better than Gasoline, and it is. But the CNG has an octane rating of about 120, so you can run higher compression. CNG is also harder to ignite, so if you're going to be running Gas for a long time, your plugs might be too hot.
And finally, without modifiying the engine, CNG typically produces lower HP. Look at generators and the ratings on Propane vs. Natural Gas.
My dad and I were talking about some related issues on Gas Turbines over the weekend. He worked on some "offshore" platforms in Lake Maricibo in the late 1950s/Early 1960s. They were running Westinghouse Gas Turbines running off the raw associated natural gas. After a while, they started having problems. The company started shipping the gas to shore, stripping out the LNG (Propane, butane, ethanes), which they could selll, and sending the Methane back to the platform. The GTs hadn't been setup for Methane and ran poorly, especially for starting.