04-18-2012 11:38 AM
Good morning, and please, we do need your experts engineer help. I am the PM at Soto Cano Air Base for the BOSS contract, and we are in the process of conducting a Design Of Experiment (DOE - Six Sigma) to see the feasibility of utilizing SVO (Straight Vegetable Oil) on generators. We have some questions inrefernce to the existing 3516B (we have 5 each) generators we have at the base:
Can Caterpillar re-furbish or retrofit 3516B generators to use SVO? If so, what need to be done?
Does Caterpillar have in inventory 3516B retrofitted to utilize SVO? If so, how can we replace the one we have for the retrofitted ones?
Does Caterpillar produce a generator that can utilize SVO? If not, is Caterpillar considering this Green venue?
James Ellerbee / PM / SCAB / Ms QSM / LSSMBB
04-20-2012 08:37 PM
Contact your local dealer.
CAT does have a publication for alternative fuel sources. From what I gather they had a strict percentage of alternative fuel sources with X amount of fuel at Y amount of load for a certain hour limit.
Running 100% SVO is probably not desired for a few reasons and may require more maintenance and replacement of certain components. The heat value of SVO would be my question and next would be the byproducts from combustion and operation and the effects of prolonged usage. Start with your dealer and work from there. I am going to guess you will not find alot of data for your desires as it probably is not cost effective for EPG applications depending on the application needs. The demand for SVO as a fuel source is probably not demanded enough for a viable case study, either way, best of luck!
04-20-2012 10:40 PM
Untreated or straight vegetable oilshave had a poor performance history in high speed engines. I've been out of it for a while, but a few years ago did quite a bit of research and the dealer I worked for did some field testing and work with University of California at Riverside, who at the time was pretty much one of the USA leaders in researching bio-diesel fuels.
In short, untreated base stocks, SVO is one of those, has issues with deposit rates, doesn't like the high surface temperatures in modern high speed diesel engine fuel systems (it oxidizes and rapidly degrades), and has storage problems, mostly with water and biological growth. It also had erratic emissions performance, and in some cases I know, problems maintaining rated power.
www.biodiesel.org has some good general information regarding biodiesel and applications for stationary and on road engines. They also point out some of the issues with non-treated fuels.
The other challenge you may find is that engine manufacturers have to certify their engines for emissions, and fuels not meeting ASTM or other similar guidelines make it hard to predict performance and emissions.
In my experience the best operation on SVO type fuels has been older design engines, like the older D399 series, we ran one for over a year on straight palm kernal oil in the Pacific, but problems with fuel storage and treatment caused an engine failure and the site upgraded the unit to a 3500 series engine.
For your last question, I think the answer is yes, before I left the dealer we quoted an Mak engine to run on palm kernal oil, and the performance engineer from Kiel seemed to think it was quite doable. I haven't seen one go in, but that type of engine, medium speed with a lower pressure fuel injection system might be your best answer.
You might want to contact some of your military partners at National Training Center, Fort Irwin. It's my understanding they run a significant amount of B20 fuels, and have been doing some work on other blends and possibly straight base stock oils like soybean. I know at one time the worked quite a bit with Southwest Research and UC Riverside on bio-diesel research.
Maybe some of the European dealers or users will add some info, as I think there are a number of projects in Europe, mostly with rapeseed oil and I heard that there was a project in Northern Africa on palm oil, I believe by Alstrom.
Hope that helps,
04-21-2012 01:54 AM
we have esperience in italy about use 3500 family engine, is good, second, way is higth speed engine piston speed is corect to use vegetable oil, yes need more thing about engine oil need more quantity, need more thing about fuel filter, and very iimportant is corect vetable oil temperacture to supply injection, we not use B seris at the moment, old mechanical sistem, temperacture exaust still same from diesel, or small different, polloution better from diesel, need spend money to accessory around engine to save engine, long list, the end of story is possible uve vegetable oil in diesel engine, 3500 series is good and hard engine, pal oil is not the best to use, lot of problem in logist also, we are full of different oil from many flover and colture not at human use, this is mi direct esperience and heart, sorry for mi englice, hope understan regards gordini claudio