Sharp JX-9400 Informations techniques télécharger pdf (Page 146)

unity. The average diﬀerence between recirculation rates is 22 per cent, close to

the recirculation rate resulting from internal leakage in the EMPA unit.

This supports the hypothesis that the surface of the clean new wheel has not

much inﬂuence on the adsorption properties of aged wheels. There are,

however, new developments of rotating heat exchangers transferring latent

heat and water vapour, without transferring chemical compounds such as

odours (Okano et al., 1999; Seibu Giken Co., 1999).

Strategies to improve the performance of

HVAC systems

Indoor air quality strategies for an optimal performance of HVAC systems and

their components can be divided in two categories:

Strategies that aﬀect the HVAC system while in use – operation, main-

tenance and replacement strategies;

10%

20%

30%

40%

50%

60%

70%

0 50 100 150 200 250

Boiling point [°C]

Transfer ratio

Alcohols

6 C chains

6 C cyclic

Figure 6.16 Transfer ratio as a function of the boiling point for

three families

Note: The ﬁlled square corresponds to dichlorohexane.

20%

40%

60%

80%

100%

0% 20% 40% 60% 80%

EPFL laboratory

EMPA

y = 1.09x + 0.22

= 0.63

Figure 6.17 Recirculation rates for each chemical compound measured in

EPFL and EMPA units, in both cases without a purging sector

Contaminants in Air Handling Units 125

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 210 211

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Sharp JX-9400 Informations techniques Page 146