Sharp JX-9400 Technical Information PDF herunterladen (Seite 144)

Results of all experiments are shown in Tables 6.6 and 6.7.

Evidence for adsorption

Leakage and entrained air would result in the same recirculation rate for all

chemical compounds, this rate being about 7 per cent for the auditorium

unit, close to zero for the laboratory unit, and about 25 per cent for the

EMPA unit. Recirculation rates of most VOCs are larger than that.

The diﬀerences among compounds shown in Figures 6.14 and 6.15 can be

explained only by a physico-chemical behaviour such as adsorption. In all

Table 6.6 VOC transfer rate in the experiments performed in

both EPFL units (%)

Auditorium unit Laboratory unit

Purging sector With Without With Without

Experiment no. A þ 1Aþ 2Aþ 3A 1A2Lþ 1Lþ 2L1L 2

1,6-Dichlorohexane 26 16 38 4 58 8 17 34 47

1-Butanol 9 10 29 16 42 11 9 34 39

1-Hexanal 15 14 23 15 29 17 3 38 34

1-Hexanol 36 32 45 30 54 16 20 41 62

Benzaldehyde 10 12 31 18 49 8 10 28 39

Dipropylether 10 13 13 5 22 5 5 24 9

Limonene 11 10 13 16 14 3 0 14 13

Mesitylene 5 9 20 15 31 7 9 28 28

m-Xylene 4 8 13 10 20 9 9 28 27

n-Decane 8 10 25 16 42 8 10 27 29

Phenol 51 44 54 50 71 32 37 64 64

Table 6.7 VOC transfer rate in the EMPA experiments

Experiment no. 1 (%) 2 (%) 3 (%) Average

(%)

Standard

Deviation

Sampling time 91 mins 91 mins 45 mins

1-Hexanal 74 57 92 74 18

1-Hexanol + m-Xylol 51 39 59 49 10

Benzaldehyde 85 63 100 83 19

Dipropylether 15 25 53 39 20

Limonene 35 22 47 35 13

Mesitylene 46 29 54 43 13

n-Decane 46 30 54 43 12

Phenol 94 57 101 84 24

Contaminants in Air Handling Units 123

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 210 211

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Sharp JX-9400 Technical Information Seite 144