Performance Analysis of Double Pipe by Using Different Nanofluids
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hot fluid (nanofluid) which is calculated by Eq. (1). The heat absorbed Q c (water)
calculated by Eq. (2),
Q = Q h =
˙
mC p
h
T h
(1)
Q = Q c =
˙
mC p
c
T c
(2)
The effectiveness is calculated using Eqs. (3), (4), and (5),
ε =
Q
Q max
(3)
ε =
(T hi − T ho )
(T hi − T ci )
m h C h < m c C c
(4)
ε =
(T co − T ci )
(T hi − T ci )
m c C c < m h C h
(5)
CFD method comprises of numerical arrangements of force, mass, and vitality
protection with different conditions. The CFD method has been used to explore the
heat exchanging process in the double pipe exchanger. Consistent state, incompressible liquid stream without mass exchange, and substance response were expected.
Consequently, just the congruity, force, and vitality conditions are thought of. The
overseeing conditions for laminar flow, consistent, and incompressible liquid stream
are as follow.
Continuity,
div
ρ
− →
V
= 0
( 6 )
Momentum,
div
ρ
− →
V
− →
V
= −gradp + ∇.
μ∇
− →
V
+ S m
(7)
Energy,
div
ρ
− →
V C P T
= div(kgradT ) + S e
(8)