Wartsila RTA 96C
Wartsila RTA 96C
(OP)
I would like to know what injection advance is used and how turbulent the combustion chamber is on these engines?
Hp/cu in seems very low as compaired to automotive engines, yet effciency is high?
Hp/cu in seems very low as compaired to automotive engines, yet effciency is high?





RE: Wartsila RTA 96C
RE: Wartsila RTA 96C
RE: Wartsila RTA 96C
The engine may be slow revving but is equipped with a very "modern" common rail injection system with three injectors per cylinder.
RE: Wartsila RTA 96C
I suspect that has something to do with the efficiency quoted.
RE: Wartsila RTA 96C
That sites been in favorites for years.
Again there are two things that don't make sense.
1 The high efficiency yet low HP per Cubic inch.
2 The low speed and alot of surface area, meaning this engine is not even close to an adiabatic type engine.
Thus lots of heat transfer, look at the oil cooled (bore cooled) piston.
You have to remember this engine uses very little fuel per hp produced. The BSFC figures are great.
If memory serves I think its in the .25/BHP hour it maybe a bit less than that.
RE: Wartsila RTA 96C
Bill
--------------------
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Jimmy Carter
RE: Wartsila RTA 96C
RE: Wartsila RTA 96C
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Wartsila RTA 96C
RE: Wartsila RTA 96C
(1) What is total combustion space heat rejection ?
(2) What is the injection advance in piston position to TDC?
(3) Why the high effciency as compaired to smaller engines yet less horse power density per cubic inch displacement?
RE: Wartsila RTA 96C
I doubt power/cubic inch really featured as a design requirement. I'd guess they could have doubled the piston area without noticing, if power was a big deal in itself.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Wartsila RTA 96C
RE: Wartsila RTA 96C
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Wartsila RTA 96C
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Wartsila RTA 96C
Offshore Engineering&Design
RE: Wartsila RTA 96C
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Wartsila RTA 96C
Greglocock,
These slow speed diesels are mostly used in the marine industry. The steam generated has many variations of use. To drive a turbo gen, turbo pump. cargo heating, accomodation heating,et al. The engine coolant can also be diverted to cargo or accomodation heating.
In all, i have seen efficiencies quoted above 80% overall per lb of fuel energy burned.
Also of course they can burn the crudest and cheapest fuel Bunker C.
Doctor Diesel in his early experiments used pulverised coal in his first engine ,built by MAN.
Offshore Engineering&Design
RE: Wartsila RTA 96C
check out this link and let your eyes pop. It currently is installed in the EMMA MAERSK. The worlds largest container ship, but that is another story.
http://people.bath.ac.uk/ccsshb/12cyl/
Offshore Engineering&Design
RE: Wartsila RTA 96C
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Wartsila RTA 96C
I should have done that in the begining.
There are many things that add to make these engines effcient. Thanks for all the posts