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and keep them in gaseous status. Only a part of the thermal energy brought from the
water will participate the chamber air thermal energy sharing. Thus the sharable energy
brought into chamber air by evaporated water can be expressed as [54]:
h 4182
T
(3.51)
va w
Where hva is the sharable thermal energy brought in by evaporated water in J/kg.
3.4.3 Thermal energy brought in at the chamber inlet
The energy brought in by air inlet when air flows from the ADU is:
Where:
Q m c T
(3.52)
Cai D Da Cai
m A u
(3.53)
D Dcs Da D
Also according to Eq. (3.6), TCai T TADUa
. So Eq. (3.52) may be expanded to:
Q c A u ( T T
)
(3.54)
Cai Da Dcs Da D ADUa
However, when reverse flow occurs the inlet is from the HADT. The energy brought in
is:
Q m c T
(3.55)
Cai T Ta Cai
Here the inlet temperatureTCai is the air temperature in HADT lump 1.
3.4.4 Thermal energy at the outlet
Same as the inlet calculation above, the outlet also needs to consider the flow direction.
When reverse flow occurs the air flows into the chamber from HADT and flows out
toward ADU.
3.4.5 Heat storage in chamber air
The heat storage in the chamber air may be expressed as:
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