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fuel economy difference in cargo shipment
Currently, I have a project that researchs methods to save fuel, mainly the practicality of using existing cars on the road to help with logistics in a region. So assuming 40000 lbs of cargo need to be shipped from point A to B (100miles). One can either use a single truck to ship this via one...- hhtguy
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- Replies: 20
- Forum: Engine & fuel engineering
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how long should the pipe be in order to cool the air by this amount?
I tried to use Dittus–Boelter correlation and got a Reynold number of 500,000,000. Prandtl number of 0.75. Nusselt number =Nu = 0.023 * Re^0.8 * 0.75^.33 = 190,000 Is that even close?- hhtguy
- Post #2
- Forum: Heat Transfer & Thermodynamics engineering
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how long should the pipe be in order to cool the air by this amount?
Air of temperature 80 F enters a copper tube with inner diameter of 2 mm. The copper tube is of fixed temperature of -50 F. Air speed is 8 m/s in order to get the flow rate I want. How long should the tube be in order to cool the air to at least 0 F when it comes out of the end of the tube...- hhtguy
- Thread
- Replies: 2
- Forum: Heat Transfer & Thermodynamics engineering
