Cooling Diesel Fuel to Increase Efficiency

[ssreese1500]

Was told recently by an engine manufacturer that by decreasing the fuel oil temperature at the fuel oil rail to my engines by 10 degrees F will give me approximately a 1% increase in efficiency.

Has anyone heard of this?

If so, do you know where i might be able to find a 110vac operated chiller that would accomplish this? My comsumption at sea speed is about 155 gallons of diesel fuel per hour, ambient temp in the 115 degree F range, and the fuel into the engine is approx. 100 degrees F. Would really love to get the temp to the engine to about 80 degrees.

Any ideas?

 

[MikeHalloran]

Just out of idle curiosity, have you measured the exhaust backpressure? I was astonished at the specification.



Mike Halloran
Pembroke Pines, FL, USA

 

[mauner]

Engine efficiency can be gained by a better (faster) burn or explosion. Engine design efficiency may be lost because the fuel temperature is too high causing less fuel to be injected. For the fuel that is injected it may vaporize too quickly instead of the ideal atomization of the fuel droplets for optimal burn. The result is higher exhaust temperature due to gases burning after the power stroke.

Poor combustion chamber design led to the quick fix to use that wasted energy to power a turbo charger. Todays design using CFD tools have produced more efficient engines. I would trust the engine manufacture to know optimal design parameters.

 

[waross]

Have you looked at adsorbtion coolers? They run on waste exhaust heat. I was given an estimate of $2000 per air conditioning ton. The units supply water at about 39 deg.F.

Each ADsorption Chiller shall be a modular, single shell (chillers larger than model-180 shall have multiple shells), hermetic design using SILICA GEL as the aDsorbent and water (tap water) as the refrigerant.

If you use airconditioning these may be a bonus.
Web site

http://www.adsorptionchiller.com/

yours

 

[berkshire]

ssreese1500 (Marine/Ocean)
I mentioned this thread to an acquaintance of mine who runs a long distance sport fisher 105 feet long. He is intrigued enough to run a line from his day tank through the saltwater chillers in his fish hold, back to the injectors. He says he will let me know if it does any good.
B.E.