Part load to full fuel efficiency for small natural gas 4 stroke engine
Part load to full fuel efficiency for small natural gas 4 stroke engine
(OP)
I am looking for literature supporting very low efficiencies of small about 8 to 10 kW rated natural gas fired SI engines- water cooled.
Something similar to the graph as attached. I know that the efficiencies go low at part load but how much and are their any testing result that i can refer to. I did not find much info on spec sheets by manufacturers. Although large engines data is easily available. Any help.
I had a thread but i was deleted due to wrong group without being moved here.
Something similar to the graph as attached. I know that the efficiencies go low at part load but how much and are their any testing result that i can refer to. I did not find much info on spec sheets by manufacturers. Although large engines data is easily available. Any help.
I had a thread but i was deleted due to wrong group without being moved here.





RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
Your next challenge will be to find the BSFC chart for the specific engine that you are looking that.
Failing that ... the BSFC charts for generic spark-ignition engines are all similar in concept, so try finding one for an engine that operates in a similar RPM range. Gasoline versus natural gas fuel won't make an appreciable difference, but how much error are you willing to tolerate in the results?
RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
Suggestions that come to mind:
- California Energy Commission
- California Air Resouces Board
- SoCal Gas
- SCAQMD (South Coast Air Quality Management District)
- (US) Department of Energy
- NGV Coalition
- IANGV (International Association for Natural Gas Vehicles)
- GRI (Gas Research Institute)
For all I know some of these organizations may now be dormant or defunct, but perhaps their reports are nevertheless archived somewhere."Schiefgehen will, was schiefgehen kann" - das Murphygesetz
RE: Part load to full fuel efficiency for small natural gas 4 stroke engine
So you only want some data that supports your preexisting conclusions?
I hope you appreciate your use of the phrase "very low efficiencies" is entirely subjective. What is your definition of "very low efficiencies"?
I also assume you meant natural gas fueled SI engine rather than natural gas fired SI engine. The combustion event of an SI IC engine is initiated by a spark produced by the spark plug.
As others noted, the part load efficiency of an SI IC engine using NG fuel would not differ much from one using petrol, all other things being equal.