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Member

Join Date: Sep 2007
Posts: 7

JP-7 Fuel Alternatives?

09/24/2007 12:44 PM

Hello friends

In turbine generator we are using jp-7 fuel, what is the alternate of this, because its very costly and we want to reduce the running cost.The ambient temperature, 2 degree centigrade minimum in winter up to 48 degree centigrade in summers.

Regards.

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Guru
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Join Date: Jan 2007
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#1

Re: jp-7 fuel

09/24/2007 1:45 PM

JP fuel is Jet Propulsion fuel. The Number after it is the version.

Years ago we used JP -4 which is kerosene based fuel. It was very unstable and required constant circulation. We used this until one of our ships had a massive explosion. After the explosion, They developed JP 5 which was more stable, yet still required recirculation a couple of times a day. Commercial fleet and the US air force went to JP-8 (JET-A). JP8 is a cheaper version of JP5.

JP6 was developed for long range bombers which operate at lower temperatures.

JP7 is has an extremely high flash point designed for hypersonic aircraft. It can operate in a wide range of temperatures.

Any substitution will reduce the efficiency, and possibly damage the components. It is best you contact the manufacturer to see if JP-8 could be used in your situation.

See:

http://en.wikipedia.org/wiki/JP-7

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Anonymous Poster
#2

Re: JP-7 Fuel Alternatives?

09/25/2007 7:24 AM

Might look into trying JP-5. Used it for helos when I was on a ship in the Navy. Seems to be pretty stable and can get it with FSII (fuel system icing inhibitor). Though you may not need that, aircraft needed it for operating at altitudes. We also ran DFM (diesel fuel marine) in main propulsion gas turbines and never had problems, just a matter of changing the specific gravity setting on the main fuel control for different fuels. Hope you can find something suitable, turbines do guzzle some fuel.

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Guru
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#3

Re: JP-7 Fuel Alternatives?

09/25/2007 11:56 AM

In turbine generator ---JP7 FUEL---:
please state following:

For Gas Turbine:

  • Make-Company
  • Model#
  • Year of manufacture
  • Operating Ambient Temp-min.>max.(+2>+48)ºC
  • Stationary/Mobile/Aviation Duty?
  • Continuous/Intermittent/baseload -- run?
  • rpm at which run?

For Generator

  • Nameplate KW/KVA -Hz(50/60/400)?
  • RPM at which run?

Location

Country/Town/City?

On receipt we will try to

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Power-User

Join Date: Dec 2006
Posts: 441
Good Answers: 20
#4

Re: JP-7 Fuel Alternatives?

09/25/2007 12:09 PM

You might ask the turbine manufacturer if your turbine can be converted to operate on some form of gas such as natural gas or well head gas.

Many GE turbines are able to operate efficiently on natural gas. An advantage of natural gas is its greater insensitivity to storage temperatures, little or no carbon deposits in the engine's hot section and reduced fuel storage maintenance costs (no requirement for fuel stabilizers or fungicides).

As one contributor suggested, other JP formulations may work as well but it is best to check with the manufacturer for recommendations.

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Anonymous Poster
#5

Re: JP-7 Fuel Alternatives?

11/02/2007 11:41 AM

I'm rather curious as to the application of a turbine that would be set up to run on JP-7, the only application I am aware of for that fuel was the SR-71 and the A-12 OXCART and their derivatives using the Pratt and Whitney J58 engine. In fact the fuel was specifically developed for that particular application.

This question is sending up warning flags for me. This is venturing into national security type information.

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