LPG: Liquefied Petroleum Gas , mixture of low molecular weight hydrocarbons.
"The name comes from the fact that the components are in gaseous form at room temperature and atmospheric pressure but are liquefied pressure following the logic of economizing the carriage . The advantage you get is to increase the gas density about 250 times, thus reducing the footprint for a given mass (and therefore of energy produces), this logic makes possible the use of pressure containers of relatively limited size . To give an example, a cylinder of 40 dm3 contains approximately 6 kg of methane gas, compressed to over 20 MPa (200 bar), an equal volume of a cylinder of LPG contains about 20 and therefore the energy supplied is about 3 times higher . "
In Following the accident occurred last Tuesday, June 30, several controversies have been raised about the dangers of LPG and particularly of cars that use it as fuel.
Meet clear. I tried to assemble as much information and reliable sources can be found on the Internet to figure out exactly how the situation is. On
Ecoblog.it give an interview to Ing. Salvatore Piccolo, head of car-Assogasliquidi Federchimica. Here's a taste.
"Q: The auto LPG cars are safe?
A: Yes we are. On the web there is a movie (the one that I propose to Ed) which shows that are carried out tests to establish the safety or otherwise of a gas and in that case we speak of LPG. That said it should also be clarified that the LPG gas tank installed in the classic car is equipped with a valve (valve) that closes when we turn off the ignition. This means that either an accident, and then turns off the engine, or in case of a parking garage, garage or other, if in the presence of leak in the gas is released only in piping, and not in the cylinder and This first figure is expected to remove many already concerns about safety.
Q. It 's just that the safety device present?
A: No. In LPG there are several devices that are there to ensure safety in all circumstances, the heavier the incident ordinary forgetfulness. There are relief valve filler used to block the release during refueling, the safety valve that keeps constant pressure in the reservoir or the fuse that holds the gas inside the gas tank in case of fire. A level engineering and technology is much easier to intervene with technical devices at small containers, such as those for cars, rather than large tanks. In addition, the donuts are to be replaced every 10 years. The point is that LPG cars are often pulled in an accident that involved nothing have to do with the gas and not statistically dangerous accidents such persons are in a very low number. Different, however, is the situation of commercial transportation and industrial markets. "
So LPG cars have a system designed and tested to prevent explosions and accidents caused by liquefied gas . In this regard I also found a video demonstrates the usefulness of the new engine technology and safety valves.
Watch Video
For those who want to know in detail the form, function and placement of valves Boldringroup.it recommend the site, where you can find descriptions with photos of each.
Gpl o non Gpl? Questo è il dilemma.
Abbandonare una nuova tecnologia che potrebbe farci risparmiare tanti bei soldini solo per colpa di una saldatura mal eseguita (probabilmente è questo il motivo dell'incidente di Viareggio) non sembra essere una mossa costruttiva.
Creare il panico nella gente e allarmarsi non serve, perchè la paura in questo caso non ha fondamento: le procedure e i metodi della produzione industriale sono molto diversi da quelli adottati per uso civile. E poi diciamolo, sono anni che il Gpl viene trasportato via treno e non è mai accaduto nulla del genere: non può essere solo fortuna!
Per concludere, è normale che nuovi sistemi come l'impianto LPG car in need of a break-in period before they can be at most of the functionality and security, but this does not mean that some engineer has taken the liberty of putting into circulation an unsafe product.
We are not (yet) in the banana republic.
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