Sanyo ECO G SGP-EW120M2G2W, Технические данные инструкция

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System Design
5. Outdoor unit positioning requirements
D-23
2) Calculate the area of air inflow from surroundings
Calculate the effective inflow area, considering the effect of
surrounding walls.
a) Calculate effective inflow height Hwe
The calculation method depends on the type of wall. The two
types to consider are louvers, which allow air to pass, and
sound barrier walls, which do not.
i). Walls the permit air passage (including the case of no wall)
• Use the following formula to calculate the height of inflow,
Ha
1
to Ha
4
(m) for each wall.
Ha = L
W
+ Hu + 1.5Ht + U
H
where
Ha = inflow height (m)
L
W
= Distance from wall to nearest outdoor unit (m)
However, when there is no wall, L
W
= 6.
(Refer to item (5) -[1]-1) for details of U
H
.)
• Calculate effective inflow height Hwe (m) for each wall. Depending upon wall height and inflow
height Ha, apply one of the following formulae.
For Hw
≥
Ha, Hwe =(Ha – (H
U
+ H
H
+ Ht)) × Xw + (H
U
+ H
H
+ Ht) × Xw × 2
For Hw < Ha, Hwe =(Ha – Hw + [Hw – (H
U
+ H
H
+ Ht)] × Xw + (H
U
+ H
H
+ Ht) × Xw × 2
where Hw = Wall height (m)
Xw = Wall opening fraction
•
The wall height below the exhaust part (H
U
+ H
H
+ Ht) has twice the weighting of other parts
(inflow wind speed is doubled from 0.5 to 1 m/s).
•
When there is no wall, Hwe = Ha.
ii). Walls that block air passage
• Use the following formula to calculate apparent heights Hb
1
to Hb
4
(m) for each wall.
Hb = Hw – H
U
– 1.5Ht
where Hb = Apparent height (m) of wall
Hw = Wall height (m)
• For each wall, use the diagram at the right to obtain the effective inflow heights Hwe
1
to Hwe
4
(m)
for each wall.
b) Calculate effective inflow length Le
From the effective inflow height Hwe calculated for each wall, calculate effective inflow lengths Le
1
to Le
4
.
• Calculate the effective distance from each boundary surface (wall) to the nearest unit, Lwei (m).
With no wall: Lwei = 6
If Lwi
≥
6m, then Lwei = 6
If Lwi < 6m, then Lwei = Lwei
• Calculate effective inflow lengths Le
1
to Le
4
(m) for each wall.
Le
1
=L
N
+Lwe
4
+Lwe
2
Le
2
=L
M
+Lwe
3
+Lwe
1
Le
3
=Le
1
Le
4
=Le
2
c) Calculate effective inflow area
From effective inflow heights Hwe
1
to Hwe
4
and lengths Le
1
to Le
4
, calculate the effective inflow area
for each wall.
i) Calculate effective inflow area Se
1
to Se
4
(m) for each wall.
Se
1
=Hwe
1
×Le
1
Se
2
=Hwe
2
×Le
2
Se
3
=Hwe
3
×Le
3
Se
4
=Hwe
4
×Le
4
ii) Calculate the overall effective inflow area, Set (m
2
).
Set=Se
1
+Se
2
+Se
3
+Se
4
iii) Calculate the areas of adjoining surfaces.
Se
12
=Se
1
+Se
2
Se
23
=Se
2
+Se
3
Se
34
=Se
3
+Se
4
Se
41
=Se
4
+Se
1