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3. COMPONENT DESCRIPTION
is not in direct contact there will be a temperature difference (over
the tubes), and the outlet temperature of the fluid will be higher
than for the Wet Cooling Tower.
In this project only the Dry Cooling Tower and the Wet Cooling
Tower will be investigated and modeled since they constitute the two
extremities.
3.14.1 Dry Cooling Tower - TOWERd
The heat transmission of the dry tower works exactly as the general heat
exchanger component (see section 3.8 page 57). The only new thing is
that the cold fluid is humid air with a humidity at the inlet equal to that
of the ambient air, while the outlet air has the same absolute humidity as
inlet air (i.e. the relative humidity changes).
T [° C ]
T w ,o
T w ,i
ΔT min ,w , i
ΔT min ,w , o
T air , o
T air ,i
TOWERd
˙Q[kW ]
Figure 3.17: Dry Tower: ∆T min,w,o (left side) specifies how much larger the water outlet
temperature is than the (ambient) air inlet temperature. ∆T min,w,i (right side) specifies how
much colder the outlet air is relative to the water inlet temperature
.
The electricity consumption of the fan in the tower is calculated by
the volume flow of the air times the (explicitly given) pressure loss in the
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