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5. Calculation of Dust Concentration
An air conditioning system using the Lossnay is shown below. Using this diagram the level of dust concentration can be easily
determined.
Dust concentration study diagram
Lossnay unit
Q
: Outdoor air intake amount (m
o
Q
: Indoor unit air volume
i
(Total air volume of indoor unit) (m
In this type of system, when the performance of each machine is known, the indoor dust concentration C
the filtering performance of the filters, η
formula is used:
G + C
Q
(1 – η
o
o
C
=
i
Q
+ Q
η
o
i
i
Also, with the value of Ci and ho known, the efficiency of the indoor unit can be found using:
G + C
Q
(1 – η
o
o
o
η
=
i
C
Q
i
High-efficiency filter ηo
3
η
: Filtering efficiency of humidifier with high efficiency filter (%)
/h)
o
(colorimetric method)
3
η
: Filtering efficiency of filter for indoor unit (%) (colorimetric method)
/h)
i
and η
, having been set to specific values as per manufacturer's data. The following
o
i
)
o
) – C
Q
i
o
× 100
i
CHAPTER 8
Indoor unit
Indoor unit filter ηi
C
o
C
i
G : Amount of dust generated indoors (mg/h)
Filtering for Freshness
: Outdoor air dust concentration (mg/m
: Indoor dust concentration (mg/m
may be obtained with
i
3
)
3
)
91
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