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 Pressure increase of diesel fuel Post Reply Forum
 Posted by: MechDude ® 08/10/2006, 01:08:05 Author Profile eMail author Edit I have the following situation - Diesel fuel is travelling through a pipeline at a pressure of 350kPa from a tank that is open to atmosphere, when a valve at each end of the pipe closes. The temperature of the diesel in the pipe is at 20 degrees. The pipe is heated to 70 degree. The diesel is now in a set volume (due to the closure of the valves). How do I calculate the pressure increase of the diesel?

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 Re: Pressure increase of diesel fuel Re: Pressure increase of diesel fuel -- MechDude Post Reply Top of thread Forum
 Posted by: Kelly Bramble ® 08/10/2006, 20:31:01 Author Profile eMail author Edit With a fixed volume and a temperature rise in the liquid, you should see a pressure increase.What you realy need is a temperature - pressure curve of diesel. I know there is a equation to solve for temperature and pressure with steady volume, however I simply do not remember it.You can measure the change in pressure due to temp. by installing a pressure gage within the system in question. Modified by Kelly Bramble at Thu, Aug 10, 2006, 20:32:02

 Re: Re: Pressure increase of diesel fuel Re: Re: Pressure increase of diesel fuel -- Kelly Bramble Post Reply Top of thread Forum
 Posted by: MechDude ® 08/10/2006, 22:12:22 Author Profile eMail author Edit This is a design concept at the moment, so I can not messure the pressure.

 Re: Pressure increase of diesel fuel Re: Pressure increase of diesel fuel -- MechDude Post Reply Top of thread Forum
 Posted by: Scooter ® 08/10/2006, 12:14:43 Author Profile eMail author Edit Is the diesel "Pumped" thru the pipeline or does it Gravity flow from the storage tank ?If it is gravity fed, the pressure when the valve is closed would be based on the liquid height of the tank. If pumped, you need more info. (ie, is pump turned off prior to valve closure or after, etc.)Scooter

 Re: Re: Pressure increase of diesel fuel Re: Re: Pressure increase of diesel fuel -- Scooter Post Reply Top of thread Forum
 Posted by: MechDude ® 08/10/2006, 19:03:09 Author Profile eMail author Edit The diesel is pumped from the storage tank, and the operating pressure is 350kPa. The isolation valves are linked to the pump motor and they close at the same time as the pump stopping.

 Re: Re: Re: Pressure increase of diesel fuel Re: Re: Re: Pressure increase of diesel fuel -- MechDude Post Reply Top of thread Forum
 Posted by: Kelly Bramble ® 08/11/2006, 08:14:24 Author Profile eMail author Edit /thermodynamics/effect_temp_fluid_prop.htm - see the last sentence.