Liquefied Natural Gas (LNG) as Fuel for Road Heavy Duty Vehicles Technologies and Standardization Sintesi AB srl

Format:

Conference/Event

Author/Creator:

Bassi, Bassi, author.

Conference Name:

10th International Conference on Engines & Vehicles (2011-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

Natural Gas Vehicle (NGV) engine technology is mainly based on awell-known and already established engine functioning principle,the Otto engine. The recent developments achieved and the OEMs pushfor this kind of technology clearly shows the confidence andreliability of this technology, especially when it comes to the useof compressed natural gas (CNG). For the above-mentioned reasons,the number of applications involving NGVs has increasedworldwide.Environmental and economic reasons, on the whole, have been themain drive for this diffusion. Natural Gas chemical properties arean irrefutable proof of the advanced behavior, environmentallyspeaking, of a fuel that emits less CO₂ (due to its carbon-hydrogenbalance when compared to other fuels) and less NOx and PM. In manycountries, favorable taxation schemes have helped the developmentand entrance into the market of the NGV technology, especially forthe light-duty vehicles. Until now, practically no heavy-dutyvehicles or lorries have taken advantage of this fuel, because ofpayload restrictions, and due to the cylinders weight required fora suitable range, an issue requested by specific commercial missionprofiles.Nevertheless, Liquefied Natural Gas (LNG) offers the possibilityof using this fuel for heavy-duty road transport applications dueto its higher energy density. It should be taken into account thata temperature of -162°C is required (at atmospheric pressure) tomaintain the fuel in liquid state, therefore the main issue of thistechnology lies on the cryogenic tank installed on board with athermal behavior control system and the board vaporizer required tofeed the internal combustion engine (ICE). This aspect (on boardcryogenic vessels) and some others like the refuelinginfrastructure still require some standardization work, aspect thatis being developed at ISO level.In this context a new interesting opportunity arises withregards to the refueling infrastructure, that is the L-CNG fillingstations concept.This application could be used by all types of natural gasvehicles since it's able to deliver both LNG and CNG.The gas in compressed form in this case is obtained from aliquid cryogenic pump at 300 bar followed by a downstreamvaporizer, which releases gas in compressed form at 200-250 bar. Inthis way, a reduced amount of energy is required, when compared tothe usual filling stations operated by compressors to build up theCNG from the piped gas

Notes:

Vendor supplied data

Publisher Number:

2011-24-0122

Access Restriction:

Restricted for use by site license