Abstract
The flow and heat transfer characteristics in helically baffled shell and tube heat exchangers were studied experimentally. The results show that, when the helix cycle is fixed, for the same flow rate, the pressure drop of the shell side of helical baffled heat exchanger decreases with the increase of helix angle, and is far lower than that of segmental baffle heat exchanger; as the shell diameter decreases, the pressure drop increase markedly. For the same Re number, the shell side heat transfer coefficients for helical baffled heat exchanger are lower than those for segmental baffle heat exchanger, and reach the maximum when the helix angle is 40 degrees. At the same flow rate, the helical baffle shell-tube heat exchanger has a higher heat transfer coefficient than that of segmental baffled heat exchanger for both per unit pressure drop and per unit pump power.
| Original language | English |
|---|---|
| Pages (from-to) | 147-149 |
| Number of pages | 3 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 30 |
| Issue number | 1 |
| State | Published - Jan 2009 |
Keywords
- Heat transfer coefficients
- Heat transfer enhancement
- Helical baffle
- Pressure drop
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