Abstract
The commercial viability of heat exchanger is mainly dependent on its long-term fouling characteristic because the fouling increases the pressure loss and degrades the thermal performance of a heat exchanger. An experimental study was performed to investigate the characteristics of fluid flow and heat transfer in a fluidized bed heat exchanger with circulating various solid particles. The present work showed that the higher densities of particles had higher drag force coefficients, and the increases in heat transfer were in the order of sand, copper, steel, aluminum, and glass below Reynolds number of 5,000.
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Abbreviations
- A :
-
Contact surface [m2]
- C d :
-
Drag coefficient
- d :
-
Diameter [m]
- F b :
-
Buoyancy force [N]
- F d :
-
Resistance force [N]
- F g :
-
Gravity force [N]
- g :
-
Gravity acceleration [m/s2]
- h :
-
Heat transfer coefficient [W/m2K]
- m :
-
Mass [kg]
- m :
-
Flow rate [kg/s]
- Nu :
-
Nusselt number
- Re :
-
Reynolds number
- U r :
-
Relative velocity [m/s]
- V :
-
Water velocity in the tube [m/s]
- ν :
-
Kinematic viscosity [m2/s]
- 0:
-
Without solid particle
- 1:
-
Solid particle diameter
- 2:
-
Tube diameter
- b :
-
Bulk
- p :
-
Solid particle
- t :
-
Tube
- w :
-
Wall, water (fluid)
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Ahn, S.W., Lee, B., Kim, W. et al. Characteristics of fluid flow and heat transfer in a fluidized heat exchanger with circulating solid particles. KSME International Journal 16, 1175–1182 (2002). https://doi.org/10.1007/BF02984437
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DOI: https://doi.org/10.1007/BF02984437