Kevin Pemberton wrote:
> The problem with CNG are the number of CNG outlets. Propane works as well, however one needs to consider the BTUs available, about 20% less power to the gallon. This translates into 20% less watts and 80% less time per gallon of fuel, so the generator needs to be sized accordingly.
>
My city has a fleet of CNG powered buses. The drivers complain they are
'gutless'. The buses have the same engine as their diesel counterparts
(with obvious changes for the different fuel), thus the drivers 'feel'
the derate as they drive both the CNG and diesel version of the same
vehicle.
I'm not aware of any one running a CNG car, although the taxi feel
makes extensive use of 'LPG' as we call it. (Mostly propane), and many
service stations are equiped to fill LPG cars - due to the Taxi /
commercial fleet. Only the main government owned bus operator uses
Natural Gas as the bus depot has to be feed from a high pressure gas
line and they only sprung for the money to equip two depots out of a
dozen or so. The 'private' operators see no value, expensive fueling
infrastructure and a derated engine.
Both Natural Gas and Liquid Petroleum Gas are orderless thus in
'retail' both have a perfume added so you can smell a leak.
On a small boat - is exchanging a tank of Petrol (gas)/diesel for a
pressure tank full of CNG / LPG a win anyway ?
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