Wind turbine cooling technologies - Wind Power Generation and Wind Turbine Design - page 629

Read fin pairs on two sides

Output “This is
fin pair is not
suitable”

Read heat dissipating capacity Q and wind velocity v c,in

Compute weight and efficiency of the
radiator and pressure drop on liquid side;
Output data

Assume the radiator height c

Change c

Compute other fin parameters

Y

Assume airside average t c,av ?
compute parameters

N

Does the default c =
c real ?

Change
t c,av

N

Compute the real radiator
height c real

Is this t c,av
suitable?

N

Y

Y

Assume liquid side average t h,av ?
compute parameters

Is t c,out <t h,in ?

Change
t h,av

Is T c,av suitable?

N

Y

Figure 8: Flow chart of the optimization and computation of the radiator.

demands of the system. The calculated results by MATLAB forms are in Fig. 9.
It can be concluded from the fi gure that, as the fi n height on the airside declines,
the fi n height on the liquid side rises and the wind condition numbers with a heat
exchanger thickness exceeding 0.2 m increases correspondingly, thus leading to
an unreasonable collocation.

4.2.3.2 Selected heat exchanger thickness corresponding to different fi n pairs
and the weight of the heat exchanger
When the 18 values of c (heat exchanger thickness) are all less than 0.2 m corre-
sponding to 18 wind conditions, it indicates that this fi n pair can meet the system's
cooling and dimension requirements simultaneously. Similarly, it can be found
that when the fi n pair is cc1 and ch1, indicating that the airside fi n height reaches
its maximum and that of the liquid side is of its minimum, the selected thickness
c max and weight W max is the smallest, and thus the structure of the heat exchanger