Calculation Of Dust Concentration - Mitsubishi Electric Lossnay LGH-15RX3 Technical Manual

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:
(1 – η
G + C Q
o o
C =
i
η
Q + Q
o i i
Also, with the value of Ci and ho known, the efficiency of the indoor unit can be found using:
(1 – η
G + C Q ) – C
o o o
η
=
i
C Q
i i
High-efficiency filter ηo
η
3 : Filtering efficiency of humidifier with high efficiency filter %
/h) o
(colorimetric method)
η
3 : 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
Q
i o
× 100
CHAPTER 8 G Filtering for Freshness
Indoor unit
Indoor unit filter ηi
C : Outdoor air dust concentration (mg/m
o
C : Indoor dust concentration (mg/m
i
G : Amount of dust generated indoors (mg/h)
3
)
3
)
may be obtained with
i
109