Power lossses in air intake
Power lossses in air intake
(OP)
Good day mu friends, I am back at en-tips with a new name and I know some can give an idea on this: In our new power plant I inspected the air intake for our engines and I found that the transition from rectangular to round was not well done and also we have internal plates that will cause turbulences. How can I calculate the power losses due to this 2 factors? Check the pictures. The power og each engine is 18 MW and any improvement will be of great help.-





RE: Power lossses in air intake
RE: Power lossses in air intake
RE: Power lossses in air intake
The important thing is to compare the intake restriction to the allowable restriction figure from the manufacturer and have a figure less than the limit. Your power will not be impacted (for any diesel engine I've seen) within the manufacturer's restriction limits.
RE: Power lossses in air intake
RE: Power lossses in air intake
RE: Power lossses in air intake
http://www.engineeringtoolbox.com/sizing-ducts-d_2...
RE: Power lossses in air intake
RE: Power lossses in air intake
RE: Power lossses in air intake
RE: Power lossses in air intake
B.E.
The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor
RE: Power lossses in air intake
"In our case 1% improvement would mean a lot of power increase."
So, you should have bought larger/more powerful engines ?
RE: Power lossses in air intake
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: Power lossses in air intake
http://www05.abb.com/global/scot/scot208.nsf/verit...
ABB had a pretty good inlet air piping design guide at one time, I haven't been able to find a copy. MAN used to have a prety good installation guidebook that included inlet air piping design recommendations. If the turbo's are provided by someone else, you might see if they have published inlet piping design guidelines.
Mike L.
RE: Power lossses in air intake
RE: Power lossses in air intake
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: Power lossses in air intake
RE: Power lossses in air intake
RE: Power lossses in air intake
@catserveng: this are MAN turbos but they are not the problem, the filters are from another brand and the problem is the reduction from retacngular to round which is not well done, the brand is Clarkor Uk model autoflo
RE: Power lossses in air intake
RE: Power lossses in air intake
Do you know if, for the engines in question, the boost pressure/mass airflow is under closed loop control (via a wastegated etc) turbocharger?
If they are then I would not worry too much about inlet restrictions, unless it is efficiency you are looking for or you are close to the operating limits of your turbochargers and/or intercoolers.
Whilst under closed loop control, for a target boost pressure/mass airflow, the wastegates will be closed more to provide the extra boost to overcome the losses - however, this will move your operating point to the right of the compressor map, towards the choke line. Working the turbos harder and requiring more intercooling and giving a higher intake temp. Not the end of the world but very much dependant upon other boundary conditions, such as combustion noise etc etc.
If, however, there is no closed loop control I would be concerned about exhaust temps & smoke before power loss as, unless the engine was calibrated for that mass airflow/boost pressure you will not be running in the 'as mapped' condition.
MS
RE: Power lossses in air intake
RE: Power lossses in air intake
What I would expect is efficiency improvement, in this market that could representa a lot of costa savings. Te engines have all controls ya Scad ti a Man control room