Environmental Engineering Reference
In-Depth Information
Analysis of Results
All the considerations mentioned for the combined system, are essentially linked to the
evaporative cooler behaviour.
Heating and cooling mode analysis
Temperature Factor:
•
Heating Mode: This is the most contributory factor. Its shows a lineal decreasing trend,
the transition between heating and cooling mode can be clearly appreciated next to
temperature level 3, where primary air and secondary air temperatures are very similar.
•
Cooling Mode: this is the most contributory factor. Its shows a lineal decreasing
trend, although this trend could be considered as increasing trend, due to the fact that
more negative values results in a gain in terms of energy recovered in cooling mode.
This fact can be easily explained in terms of thermal differences between primary
and secondary airstream when temperature factor is increased from T5 to T9.
Furthermore, the cooling mode potential in terms of energy recovery in comparison with
heating mode is clearly shown. Due to the aforementioned fact, a conclusion can be inferred,
the behaviour of the analyzed device can be considered as irreversible and thus it should be
operated under cooling conditions.
Heat Pipes System
In this subsection a detailed analysis for the heat pipes system was carried out. Firstly,
the corresponding results for both working modes are shown ( See Figure 20 and 23 and
Tables 14-15 and 18), and secondly, these results are studied separately for heating mode
(See Figure 21 and 24 and Tables 16 and 19) and cooling mode (See Figure22 and 25 and
Tables 17 and 20).
Table 14-. Single factors mean values
Sensible Heat (W)
Factors
Mean Values
Factors
Mean Values
V1
-19.77
T4
-20.30
V2
-37.10
T5
-31.07
V3
-36.35
T6
-64.59
T1
98.49
T7
-88.35
T2
59.79
T8
-125.62
T3
48.14
T9
-156.16
