1

Heat transfer intensification by fluidized

PCM particles: air cooled condenser case

Dr Vladimir Zivkovic

School of Chemical Engineering

Newcastle University

HEXAG Meeting, May 2015, Newcastle

Air cooled condenser

2

Dry cooling

+ No water required

- Very large equipment

The greatest resistance to heat rejection is on the air

side.

Fluidized bed heat exchangers

Enhanced heat transfer coefficient (order of magnitude)

Shallow fluidized bed condenser with PCM particles

Further enhancement due to phase change

Heat transfer enhancement

3 dp m

250 500 750100 1000

Heat

tra

nsfe

r co

eff

icie

nt

(bed-t

o-s

urf

ace)

W/m

2 K

250

750

1250

1750

2250

2750

0

500

1000

1500

2000

2500

Shallow fluidized bed

4

particles

particles

A.A.B. Pécora, M.R. Parise, Brazilian Journal of Chemical Engineering, 23 (2006) 497-506.