harrisj,
You're right about engine weights:
The Caterpillar 3056 Marine (205 bhp, 6 litre) engine has a dry weight of 1342 lbs.
The C-12 marine engine (490 bhp, 12 litre) has a dry weight of 2588 lbs.
Coldest temperature ever recorded in Alaska was -80F.
http://www.usatoday.com/weather/wcstates.htm
Coldest temperature recorded on Earth was -89.4C (-128.9F) in Antartica.
http://en.wikipedia.org/wiki/Coldest_temperature_achieved_on_earthtarctica.
I'm a Mech Eng who has made the jump to lawschool.
What is interesting (and what I initially had a hard time with) is that in law, being held to the standard of another "reasonable engineer" is considered an "objective" test. (Whereas, to my engineering-trained mind, and to most of yours by...
rusika,
As rcrowl said, pump power is a function of flow rate, head and density of the fluid. But power can also be expressed as a function of torque. You may recall work = force x distance, and rate of work-done is power. The power consumed by the pump is provided by a motor or engine...
AusLee,
One more thing to consider: if you go to a lower speed engine you may have to upgrade the engine size (i.e. add a few cylinders) which will increase your overall project cost.
At the same load (1000 kVA) a larger engine may produce a slightly lower exhaust flow rate, possibly letting...
Try the "Applied Scientist" definition and see if that gets a better reaction from grade 10s...
"Engineers apply science to real-world situations to create new or better things, systems, and processes."
or (a little more cynically) ...
"Engineers make stuff so that the marketing guys can get...
freedomtech,
AMOT makes thermostatic valves might have something appropriate... but they're WAY more expensive than $20.
http://www.amot.com/us/products.asp
There is a minimum standard that is applicable Greg. It's the P.Eng standard in Canada or PE in the states.
What I meant was if you are a P.Eng with 20 years of design experience, and a Ph.D in the specific subject you may be held to a higher standard than a brand new P.Eng, even it he is...
the standard of care that an engineer must meet will be determined by what other reasonalbly prudent engineers with the same amount of education, training, and experience, in that particular field (and yes, possibly that geographic region), acting reasonably would have done in a similar...
Oh yeah, and separate cooling systems for each engine is a strongly preferable system. If the cooling circuits (at least on the engine side) are interconnected you can and will run into problems if one of the engines is running or not pulling the same load as the others.
neweng1,
designing a heat recovery system is not easy, and there are different ways to do it - including two main difference: low temperature and high temperature (steam). Sounds like you may be dealing with the more simple low temperature situation:
typically you need a radiator (usually...
MikeHalloran is right - the power density just isn't there in the diesel vs. the gasoline engine.
Your boat won't be designed for the weight of the diesel and besides giving up 300 HP you'll have trim and possibly structural (and floatation!) issues with the boat.
Rob45
As far as I know pretty much all the major diesel manufactures except Cat use EGR to meet Tier III EPA emissions.
Cat took a bold step in developing their ACERT technology instead of going the EGR route. And they paid something like $7K per on-highway truck engine in penalties a couple...
