Indoor aerosol behaviourIndoor aerosol behaviour

Jiří Smolík1, Pavel Moravec1, Jaroslav Schwarz1, Vladimír Ždímal1,

Elin Dahlin2, Yannis Drossinos3, Mita Lapi4 and Mihalis Lazaridis5

1Institute of Chemical Process Fundamentals AS CR, Praha, 2Norwegian Institute for Air Research (NILU), Kjeller, 3European Commission Joint Research Centre, Ispra,

4Fondazione Lombardia per l'Ambiente, Milan, 5Technical University of Crete, Chania

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3

Balance modelBalance model

QvACCPCVdtdCV ininoutin )()/(

VvAvvdAhdvnAhnv /*

teCCCtCinoutinin

4

InstrumentsInstruments

NanoSMPS: 3 nm - 1 m DMA2 (EC 3085) + UCPC (3025), TSI SMPS: 7 nm - 1 m DMA1 (EC 3071A) + CPC (3022A), TSI APS: 0,7 m – 20 m (0,5 m - 20 m)

model 3320 (3321), TSI

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Set-upSet-up

AC/DC

PC4

UCPC

PC2

DMA2

APS

PC3

CPC

PC1

DMA1

T,PRH

Out

In

T,PRH

6

7

100

1000

SMPS: 100nm<GMD<700nm

1000

10000Nano: 3nm<GMD<20nm

0.1

1

8 10 12 14 16time, h

APS: 2.5mkm<AeD<10mkm

8

0 1 2 3 4 5 6

10-1

100

103

104

Fig.1 Temporal evolution of indoor concentrations ofultrafine (3-20 nm) and coarse (2.5-10 µm) particles

Dp 2.5-10 m

Dp 3-20 nm

Outdoor Indoor

con

cen

tra

tion

, #/c

cm

time, h

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Deposition rateDeposition rate

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NorwayNorway

Family house, Steinborgveien, Oslo

3.-14.6.2002

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12

13

14

15

16

17

18

Air exchange

6,0

6,5

7,0

7,5

8,0

8,5

0:00 0:10 0:20 0:30 0:40 0:50 1:00

ln C

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ItalyItaly

Office of the Fondazione Lombardia per l’Ambiente

Milan centre

8.-23.10.2002

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21

22

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24

25

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27

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Institute of Chemical Process FundamentalsAcademy of Sciences of the Czech RepublicRozvojova 2, 165 02 Prague, Czech Republic

Milano 2002

0

20

40

60

80

100

120

140

Date

mic

rog

r/m

3

indoor

outdoor

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ConclusionsConclusions

Indoor aerosol concentration depends on

• infiltration• deposition • indoor sources

Compared to outdoor aerosol concentrations the indoor concentrations can be

• higher• lower

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Conclusions - continuationConclusions - continuation

Rate of deposition on internal surfaces is

• higher for ultrafine and coarse particles• lower for the accumulation mode

Model assuming the ideal mixing in the room describes well the behaviour of the indoor aerosol

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AcknowledgementAcknowledgement

Project is supported by the grant EVK4-CT-2000-00018

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