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Indoor Air QualityIndoor Air Quality

Lee Jung-Hyun

2200937

Department of Civil and Environmental System Engineering

University of Incheon, South Korea

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ContentsContents IntroductionIntroduction Importance of indoor air qualityImportance of indoor air quality Study purposeStudy purpose

Main subjectMain subject

Indoor air pollutant and pollution Indoor air pollutant and pollution source source

Effect of Indoor air pollutant Effect of Indoor air pollutant Factors Influencing indoor air quality Factors Influencing indoor air quality

ConclusionConclusion For improving indoor air qualityFor improving indoor air quality

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Study purposeStudy purpose Introduction to Indoor AIndoor Air ir

pollutant pollutant and pollution sourceand pollution source

Application box model

-Relation among factors

-How to improve air quality

How influence indoor air pollution to human?

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Definition Definition

It is defined as the amount of pollutant or contaminations on the

indoor air.

Gases or particulate matter harmful to human and nature is called

pollutant.

Indoor air quality degraded by ourselves directly or indirectly.

It reduces by many factors such as smoking, dust, mites, mold spores, smoking, dust, mites, mold spores,

radon, and gases and chemicals from materials and appliances.radon, and gases and chemicals from materials and appliances.

What is indoor air quality?

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Sources of indoor air pollutionSources of indoor air pollution

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pollutantpollutant SourceSource

Combustion gases-CO,NOCombustion gases-CO,NO Combustion-furnace, cooking stove, Combustion-furnace, cooking stove, space heater, etc.space heater, etc.

Volatile organic compounds(VOCs)Volatile organic compounds(VOCs) Outgassing of building materials, coatings, wall and Outgassing of building materials, coatings, wall and floor coverings, and furnishingsfloor coverings, and furnishings

FomaldehydeFomaldehyde Outgassing of pressed wood, insulation foamOutgassing of pressed wood, insulation foam

ozeonozeon Duplicator, Air cleaner Duplicator, Air cleaner

Biological agents-molds, Biological agents-molds, spores, dangerspores, danger

Contaminated ventilation systems, petsContaminated ventilation systems, pets

Environmental tobacco Environmental tobacco smokesmoke

Smoking in buildingSmoking in building

RadonRadon Infiltration from soil beneath structureInfiltration from soil beneath structure

Particulate matterParticulate matter CombustionCombustion

AsbestosAsbestos Construction coatings, tile, insulationConstruction coatings, tile, insulation

Indoor Air Pollutants and Typical Indoor Air Pollutants and Typical sourcessources

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Importance of indoor air Importance of indoor air qualityquality

Cognizance about Importance of indoor air quality .

Dilution rates of atmospheric pollution

Dilution rates of indoor air pollution

We spend about 90% of our time indoors in our homes, cars, offices, factories, public buildings such as restaurants, malls, and others.

Without proper ventilation, increase concentration

Negative influence on human

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PollutantPollutant EffectEffect

Combustion gases-Combustion gases-CO,NOCO,NO

Headache, vertigo, emesis, lung Headache, vertigo, emesis, lung disease disease

Volatile organic compounds (VVolatile organic compounds (VOCs)OCs)

the production of cancerthe production of cancer

FormaldehydeFormaldehyde skin stimulus ,lung cancerskin stimulus ,lung cancer

ozoneozone stimulus on the respiratory organs , stimulus on the respiratory organs , exhaustion exhaustion

Biological agents-Biological agents-molds, spores, dangermolds, spores, danger

allergic disease, respiratory diseaseallergic disease, respiratory disease

Environmental tobacco Environmental tobacco smokesmoke

Anxiousness, lung disease, lung Anxiousness, lung disease, lung cancercancer

RadonRadon lung cancerlung cancer

Particulate matterParticulate matter stimulus on the respiratory organs stimulus on the respiratory organs and mucous membrane, the and mucous membrane, the

production of cancerproduction of cancer

AsbestosAsbestos skin stimulus ,lung cancerskin stimulus ,lung cancer

Effect of Indoor air pollutantEffect of Indoor air pollutant

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(A), exchange (B), indoor concentration

(C), outgassing of building and furniture materials

(D), infiltration from soils (E), removal on interior surfaces

Factors Influencing indoor air qualityFactors Influencing indoor air quality(application box model)(application box model)

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What is box model?What is box model?

S

Q1

C1

Q2

C2

Optional Value Substitution !

IN - OUT + SOURCE

= ACCMULATION

0 100 2004

6

8

10

12

f t( )

t

Suppose : f(t)=C 3

3

31

3

100

sec/0.10

/10

/5

mV

mQ

mugC

mugCi

)1(*/)(* /1

/ VQtVQti eQCSeCC

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0 100 2004

6

8

10

12

10.1

5.485

f t( )

2001 t

0 100 2004

6

8

10

12

10.1

5.924

f t( )

2001 t

0 100 2004

6

8

10

12

10.1

5.485

f t( )

2001 t

0 100 2005

5.05

5.1

5.1

5.01

f t( )

2001 t

0 100 2004

6

8

10

12

10.1

5.485

f t( )

2001 t

Q Q/2

V V/2

C C/2

0 100 2005

5.05

5.1

5.1

5.005

f t( )

2001 t

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ResultResult

(V) is not related to (C) , but inverse proportion with Diffusion Velocity

Q ∝ C

C ∝ C

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ConclusionConclusion

Proper ventilation is important for indoor air quality.

Reduction of the pollutant source reduces the

concentration of pollution to indoor air.

Different types of pollutant have different level of harm

to human health.

The increase of pollution level like smog and particle in

indoor air cause direct health effect and can reduce

easily than others like VOC’s

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Thank you for Thank you for attending attending presentationpresentation ……

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