Author details

Cüneyt Ezgi

Tc Cold fluid temperature, C, K Th Hot fluid temperature, C, K

26 Heat Exchangers – Design, Experiment and Simulation 34 Heat Exchangers– Design, Experiment and Simulation

ΔTlm Log-mean temperature difference, C, K U Overall heat transfer coefficient, W/m<sup>2</sup>

β packing density for a regenerator, m<sup>2</sup>

ρ<sup>m</sup> Matrix material density, kg/m<sup>3</sup>

Λ Reduced length for a regenerator π Reduced period for a regenerator

i Inlet conditions, inner, inside

lm logarithmic mean max Maximum min Minimum

u Unfinned

o Outer, outside, overall

1 Initial or inlet state, fluid 1 2 Final or exit state, fluid 2

K

/m<sup>3</sup>

t Wall thickness, m

V Velocity, m/s W\_ Power, kW z Elevation, m

Greek symbols

Δ Difference ε Effectiveness

η Efficiency

Subscripts

h Hot

c Cold fluid cf Counter flow cv Control volume e Exit conditions f Fin, finned, friction Address all correspondence to: cuneytezgi@beykent.edu.tr

Department of Mechanical Engineering, Faculty of Engineering and Architecture, Beykent University, Istanbul, Turkey
