Sharp JX-9400 Technické informace stáhnout pdf (Strana 78)

Example of application

The age of air was mapped in the conference room after the improvement,

ﬁrst in the empty room, and then with ten occupants sitting around a U-

shaped table. These measurements were performed at the head level of

sitting persons, using the nine-sampling-point full factorial design shown in

Table 3.5. The results are shown in Figure 3.11. In the unoccupied room,

the air is older at the middle left, where there is only one air inlet. When the

room is occupied, the air is younger in the middle of the room, where the

occupants are.

100

200

300

400

500

600

Age of air [s]

420-2-4

-5

-1

500–600

400–500

300–400

200–300

100–200

200

400

600

800

1000

420-2-4

-5

-1

800–1000

600–800

400–600

200–400

0–200

Figure 3.11 Map of the age of the air at head level

Note: Left is the unoccupied room, and right is the room occupied by ten persons sitting

around a conference table.

Table 3.9 Condition number of M

M for some experimental designs and

three models

Experimental design Number of

points

Quadratic

model

Interactions

model

Linear

model

2-D Designs

2-level part factorial 3 – – 2.0

2-level full factorial 4 – – 1.0

Centred 2-level factorial 5 – 1.0 1.0

Minimum for quadratic 6 6.3 1.0 1.0

3-level full factorial 9 4.4 1.0 1.0

3-D Designs

2-level half factorial 4 – – 1.0

2-level full factorial 8 – 1.0 1.0

C3 10 4.3 3.2 1.0

Composite centred 15 4.4 1.0 1.0

Age of Air and Ventilation Eﬃciency 57

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 210 211

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