Heat Transfer
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Heat transfer co-efficient (h) for a fluid flowing inside a clean pipe is given by h = 0.023 K/D `((Dvp)/(mu))^0.8 . ((C_(p mu))/(K))^0.4`
This is valid for the value of NRe equal to
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`( N_(Re) . N_(Pr))` (D/L) is called the __________ number
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For a counter current heat exchanger with Tih =` 80^circC`, `T^circ`c=` 60^circC`, `T^circ`h =` 50^circC` andTic = `30^circC`, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy
- 4
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Fouling factor for a heat exchanger is given by (where, U1 = heat transfer co-efficient of dirty surface U2 = heat transfer co-efficient of clean surface)
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In case of surface condensers, a straight line is obtained on plotting
`1/U` vs__________ on an ordinary graph paper.