ZEMCH 2019 International Conference Proceedings April.2020 | Page 376
Figure 1. Concept of Air‐type PVT collector with triangular baffles
Table 1. Information of collector by variables
Case
Collector size
W1 [mm] H1 [mm] H2 [mm]
‐
62
82.5
144
62
82.5
144
62
82.5
144 ‐
47
47
47
0
0
0
47
47
47 ‐
83
83
83
130
130
130
176.3
176.3
176.3
Reference
Case 1
Case 2
Case 3
Case 4
1,011x1,520x34mm
Case 5
Case 6
Case 7
Case 8
Case 9
Baffle
number
‐
35
35
35
35
35
35
28
28
28
2.2 Modeling conditions and methodology
The NX program used in this paper simulates fluid flow effects, such as CFD modeling, by quickly
creating flow zones for complex geometry and performing computational fluid dynamics. In addition,
a combination of thermal analysis functions for conduction, convection, radiation, and complex heat
transfer were performed.
In order to set up 10 cases according to the variable, the baffle arrangement was changed and
modeled. Afterwards, the collector performance was compared and analyzed according to baffle
parameters. For simulation of the air‐type PVT collector, the collector area was set at 1.54 m 2 , and
thermal energy of 500 W per unit area was equally supplied to each case. In order to consider the surface
heat loss of the collector, the outside temperature value (7 °C) was used as the input. The air density to
be applied according to the temperature was specified at 1.225 kg/m 3 . The gravity acceleration value
was 9.81 m/s 2 and buoyancy was applied (see Table 2).
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ZEMCH 2019 International Conference l Seoul, Korea